Merge pull request #2186 from rhansen/fallback

fix: Improve handling of unknown hosts and missing certs

README.md

@@ -347,10 +347,9 @@ Note that the `Mozilla-Old` policy should use a 1024 bits DH key for compatibili
 
 The default behavior for the proxy when port 80 and 443 are exposed is as follows:
 
-* If a container has a usable cert, port 80 will redirect to 443 for that container so that HTTPS is always preferred when available.
+* If a virtual host has a usable cert, port 80 will redirect to 443 for that virtual host so that HTTPS is always preferred when available.
-* If the container does not have a usable cert, a 503 will be returned.
+* If the virtual host does not have a usable cert, but `default.crt` and `default.key` exist, those will be used as the virtual host's certificate and the client browser will receive a 500 error.
-
+* If the virtual host does not have a usable cert, and `default.crt` and `default.key` do not exist, TLS negotiation will fail (see [Missing Certificate](#missing-certificate) below).
-Note that in the latter case, a browser may get an connection error as no certificate is available to establish a connection. A self-signed or generic cert named `default.crt` and `default.key` will allow a client browser to make a SSL connection (likely w/ a warning) and subsequently receive a 500.
 
 To serve traffic in both SSL and non-SSL modes without redirecting to SSL, you can include the environment variable `HTTPS_METHOD=noredirect` (the default is `HTTPS_METHOD=redirect`). You can also disable the non-SSL site entirely with `HTTPS_METHOD=nohttp`, or disable the HTTPS site with `HTTPS_METHOD=nohttps`. `HTTPS_METHOD` can be specified on each container for which you want to override the default behavior or on the proxy container to set it globally. If `HTTPS_METHOD=noredirect` is used, Strict Transport Security (HSTS) is disabled to prevent HTTPS users from being redirected by the client. If you cannot get to the HTTP site after changing this setting, your browser has probably cached the HSTS policy and is automatically redirecting you back to HTTPS. You will need to clear your browser's HSTS cache or use an incognito window / different browser.
 
@@ -358,6 +357,31 @@ By default, [HTTP Strict Transport Security (HSTS)](https://developer.mozilla.or
 
 *WARNING*: HSTS will force your users to visit the HTTPS version of your site for the `max-age` time - even if they type in `http://` manually.  The only way to get to an HTTP site after receiving an HSTS response is to clear your browser's HSTS cache.
 
+#### Missing Certificate
+
+If HTTPS is enabled for a virtual host but its certificate is missing, nginx-proxy will configure nginx to use the default certificate (`default.crt` with `default.key`) and return a 500 error.
+
+If the default certificate is also missing, nginx-proxy will configure nginx to accept HTTPS connections but fail the TLS negotiation.  Client browsers will render a TLS error page.  As of March 2023, web browsers display the following error messages:
+
+  * Chrome:
+
+    > This site can't provide a secure connection
+    >
+    > example.test sent an invalid response.
+    >
+    > Try running Connectivity Diagnostics.
+    >
+    > `ERR_SSL_PROTOCOL_ERROR`
+
+  * Firefox:
+
+    > Secure Connection Failed
+    >
+    > An error occurred during a connection to example.test.
+    > Peer reports it experienced an internal error.
+    >
+    > Error code: `SSL_ERROR_INTERNAL_ERROR_ALERT` "TLS error".
+
 ### Basic Authentication Support
 
 In order to be able to secure your virtual host, you have to create a file named as its equivalent VIRTUAL_HOST variable on directory
@@ -373,6 +397,49 @@ docker run -d -p 80:80 -p 443:443 \
 
 You'll need apache2-utils on the machine where you plan to create the htpasswd file. Follow these [instructions](http://httpd.apache.org/docs/2.2/programs/htpasswd.html)
 
+### Upstream (Backend) Server HTTP Load Balancing Support
+
+> **Warning**
+> This feature is experimental.  The behavior may change (or the feature may be removed entirely) without warning in a future release, even if the release is not a new major version.  If you use this feature, or if you would like to use this feature but you require changes to it first, please [provide feedback in #2195](https://github.com/nginx-proxy/nginx-proxy/discussions/2195).  Once we have collected enough feedback we will promote this feature to officially supported.
+
+If you have multiple containers with the same `VIRTUAL_HOST` and `VIRTUAL_PATH` settings, nginx will spread the load across all of them.  To change the load balancing algorithm from nginx's default (round-robin), set the `com.github.nginx-proxy.nginx-proxy.loadbalance` label on one or more of your application containers to the desired load balancing directive.  See the [`ngx_http_upstream_module` documentation](https://nginx.org/en/docs/http/ngx_http_upstream_module.html) for available directives.
+
+> **Note**
+> * Don't forget the terminating semicolon (`;`).
+> * If you are using Docker Compose, remember to escape any dollar sign (`$`) characters (`$` becomes `$$`).
+
+Docker Compose example:
+
+```yaml
+services:
+  nginx-proxy:
+    image: nginxproxy/nginx-proxy
+    ports:
+      - "80:80"
+    volumes:
+      - /var/run/docker.sock:/tmp/docker.sock:ro
+    environment:
+      HTTPS_METHOD: nohttps
+  myapp:
+    image: jwilder/whoami
+    expose:
+      - "8000"
+    environment:
+      VIRTUAL_HOST: myapp.example
+      VIRTUAL_PORT: "8000"
+    labels:
+      com.github.nginx-proxy.nginx-proxy.loadbalance: "hash $$remote_addr;"
+    deploy:
+      replicas: 4
+```
+
+### Upstream (Backend) Server HTTP Keep-Alive Support
+
+> **Warning**
+> This feature is experimental.  The behavior may change (or the feature may be removed entirely) without warning in a future release, even if the release is not a new major version.  If you use this feature, or if you would like to use this feature but you require changes to it first, please [provide feedback in #2194](https://github.com/nginx-proxy/nginx-proxy/discussions/2194).  Once we have collected enough feedback we will promote this feature to officially supported.
+
+To enable HTTP keep-alive between `nginx-proxy` and a backend server, set the `com.github.nginx-proxy.nginx-proxy.keepalive` label on the server's container to the desired maximum number of idle connections. See the [nginx keepalive documentation](https://nginx.org/en/docs/http/ngx_http_upstream_module.html#keepalive) and the [Docker label documentation](https://docs.docker.com/config/labels-custom-metadata/) for details.
+
 ### Headers
 
 By default, `nginx-proxy` forwards all incoming request headers from the client to the backend server unmodified, with the following exceptions:

nginx.tmpl

@@ -11,6 +11,7 @@
 {{- $_ := set $globals "Env" $.Env }}
 {{- $_ := set $globals "Docker" $.Docker }}
 {{- $_ := set $globals "CurrentContainer" (where $globals.containers "ID" $globals.Docker.CurrentContainerID | first) }}
+{{- $_ := set $globals "default_cert_ok" (and (exists "/etc/nginx/certs/default.crt") (exists "/etc/nginx/certs/default.key")) }}
 {{- $_ := set $globals "external_http_port" (coalesce $globals.Env.HTTP_PORT "80") }}
 {{- $_ := set $globals "external_https_port" (coalesce $globals.Env.HTTPS_PORT "443") }}
 {{- $_ := set $globals "sha1_upstream_name" (parseBool (coalesce $globals.Env.SHA1_UPSTREAM_NAME "false")) }}
@@ -19,6 +20,7 @@
 {{- $_ := set $globals "access_log" (or (and (not $globals.Env.DISABLE_ACCESS_LOGS) "access_log /var/log/nginx/access.log vhost;") "") }}
 {{- $_ := set $globals "enable_ipv6" (parseBool (coalesce $globals.Env.ENABLE_IPV6 "false")) }}
 {{- $_ := set $globals "ssl_policy" (or ($globals.Env.SSL_POLICY) "Mozilla-Intermediate") }}
+{{- $_ := set $globals "vhosts" (dict) }}
 {{- $_ := set $globals "networks" (dict) }}
 # Networks available to the container running docker-gen (which are assumed to
 # match the networks available to the container running nginx):
@@ -176,6 +178,7 @@
     {{- if exists $override }}
     include {{ $override }};
     {{- else }}
+        {{- $keepalive := first (keys (groupByLabel .Containers "com.github.nginx-proxy.nginx-proxy.keepalive")) }}
     location {{ .Path }} {
         {{- if eq .NetworkTag "internal" }}
         # Only allow traffic from internal clients
@@ -189,10 +192,14 @@
         root {{ trim .VhostRoot }};
         include fastcgi_params;
         fastcgi_pass {{ trim .Upstream }};
+            {{- if $keepalive }}
+        fastcgi_keep_conn on;
+            {{- end }}
         {{- else if eq .Proto "grpc" }}
         grpc_pass {{ trim .Proto }}://{{ trim .Upstream }};
         {{- else }}
         proxy_pass {{ trim .Proto }}://{{ trim .Upstream }}{{ trim .Dest }};
+        set $upstream_keepalive {{ if $keepalive }}true{{ else }}false{{ end }};
         {{- end }}
 
         {{- if (exists (printf "/etc/nginx/htpasswd/%s" .Host)) }}
@@ -214,6 +221,11 @@
 {{- define "upstream" }}
 upstream {{ .Upstream }} {
     {{- $server_found := false }}
+    {{- $loadbalance := first (keys (groupByLabel .Containers "com.github.nginx-proxy.nginx-proxy.loadbalance")) }}
+    {{- if $loadbalance }}
+    # From the container's loadbalance label:
+    {{ $loadbalance }}
+    {{- end }}
     {{- range $container := .Containers }}
     # Container: {{ $container.Name }}
         {{- $args := dict "globals" $.globals "container" $container }}
@@ -232,6 +244,10 @@ upstream {{ .Upstream }} {
     # Fallback entry
     server 127.0.0.1 down;
     {{- end }}
+    {{- $keepalive := first (keys (groupByLabel .Containers "com.github.nginx-proxy.nginx-proxy.keepalive")) }}
+    {{- if $keepalive }}
+    keepalive {{ $keepalive }};
+    {{- end }}
 }
 {{- end }}
 
@@ -254,11 +270,33 @@ map $http_x_forwarded_port $proxy_x_forwarded_port {
     '' $server_port;
 }
 
-# If we receive Upgrade, set Connection to "upgrade"; otherwise, preserve
+# If the request from the downstream client has an "Upgrade:" header (set to any
-# NGINX's default behavior ("Connection: close").
+# non-empty value), pass "Connection: upgrade" to the upstream (backend) server.
+# Otherwise, the value for the "Connection" header depends on whether the user
+# has enabled keepalive to the upstream server.
 map $http_upgrade $proxy_connection {
     default upgrade;
-    '' close;
+    '' $proxy_connection_noupgrade;
+}
+map $upstream_keepalive $proxy_connection_noupgrade {
+    # Preserve nginx's default behavior (send "Connection: close").
+    default close;
+    # Use an empty string to cancel nginx's default behavior.
+    true '';
+}
+# Abuse the map directive (see <https://stackoverflow.com/q/14433309>) to ensure
+# that $upstream_keepalive is always defined.  This is necessary because:
+#   - The $proxy_connection variable is indirectly derived from
+#     $upstream_keepalive, so $upstream_keepalive must be defined whenever
+#     $proxy_connection is resolved.
+#   - The $proxy_connection variable is used in a proxy_set_header directive in
+#     the http block, so it is always fully resolved for every request -- even
+#     those where proxy_pass is not used (e.g., unknown virtual host).
+map "" $upstream_keepalive {
+    # The value here should not matter because it should always be overridden in
+    # a location block (see the "location" template) for all requests where the
+    # value actually matters.
+    default false;
 }
 
 # Apply fix for very long server names
@@ -309,36 +347,103 @@ proxy_set_header X-Original-URI $request_uri;
 proxy_set_header Proxy "";
 {{- end }}
 
+{{- /*
+     * Precompute some information about each vhost.  This is done early because
+     * the creation of fallback servers depends on DEFAULT_HOST, HTTPS_METHOD,
+     * and whether there are any missing certs.
+     */}}
+{{- range $vhost, $containers := groupByMulti $globals.containers "Env.VIRTUAL_HOST" "," }}
+    {{- $vhost := trim $vhost }}
+    {{- if not $vhost }}
+        {{- /* Ignore containers with VIRTUAL_HOST set to the empty string. */}}
+        {{- continue }}
+    {{- end }}
+    {{- $certName := first (groupByKeys $containers "Env.CERT_NAME") }}
+    {{- $vhostCert := closest (dir "/etc/nginx/certs") (printf "%s.crt" $vhost) }}
+    {{- $vhostCert = trimSuffix ".crt" $vhostCert }}
+    {{- $vhostCert = trimSuffix ".key" $vhostCert }}
+    {{- $cert := or $certName $vhostCert }}
+    {{- $cert_ok := and (ne $cert "") (exists (printf "/etc/nginx/certs/%s.crt" $cert)) (exists (printf "/etc/nginx/certs/%s.key" $cert)) }}
+    {{- $default := eq $globals.Env.DEFAULT_HOST $vhost }}
+    {{- $https_method := or (first (groupByKeys $containers "Env.HTTPS_METHOD")) $globals.Env.HTTPS_METHOD "redirect" }}
+    {{- $_ := set $globals.vhosts $vhost (dict "cert" $cert "cert_ok" $cert_ok "containers" $containers "default" $default "https_method" $https_method) }}
+{{- end }}
+
+{{- /*
+     * If needed, create a catch-all fallback server to send an error code to
+     * clients that request something from an unknown vhost.
+     */}}
+{{- block "fallback_server" $globals }}
+    {{- $globals := . }}
+    {{- $http_exists := false }}
+    {{- $https_exists := false }}
+    {{- $default_http_exists := false }}
+    {{- $default_https_exists := false }}
+    {{- range $vhost := $globals.vhosts }}
+        {{- $http := or (ne $vhost.https_method "nohttp") (not $vhost.cert_ok) }}
+        {{- $https := ne $vhost.https_method "nohttps" }}
+        {{- $http_exists = or $http_exists $http }}
+        {{- $https_exists = or $https_exists $https }}
+        {{- $default_http_exists = or $default_http_exists (and $http $vhost.default) }}
+        {{- $default_https_exists = or $default_https_exists (and $https $vhost.default) }}
+    {{- end }}
+    {{- $fallback_http := and $http_exists (not $default_http_exists) }}
+    {{- $fallback_https := and $https_exists (not $default_https_exists) }}
+    {{- /*
+         * If there are no vhosts at all, create fallbacks for both plain http
+         * and https so that clients get something more useful than a connection
+         * refused error.
+         */}}
+    {{- if and (not $http_exists) (not $https_exists) }}
+        {{- $fallback_http = true }}
+        {{- $fallback_https = true }}
+    {{- end }}
+    {{- if or $fallback_http $fallback_https }}
 server {
     server_name _; # This is just an invalid value which will never trigger on a real hostname.
     server_tokens off;
-    listen {{ $globals.external_http_port }};
+        {{- if $fallback_http }}
-{{- if $globals.enable_ipv6 }}
+    listen {{ $globals.external_http_port }} default_server;
-    listen [::]:{{ $globals.external_http_port }};
-{{- end }}
-    {{ $globals.access_log }}
-    return 503;
-
-{{- if (and (exists "/etc/nginx/certs/default.crt") (exists "/etc/nginx/certs/default.key")) }}
-    listen {{ $globals.external_https_port }} ssl http2;
                 {{- if $globals.enable_ipv6 }}
-    listen [::]:{{ $globals.external_https_port }} ssl http2;
+    listen [::]:{{ $globals.external_http_port }} default_server;
                 {{- end }}
-
+        {{- end }}
+        {{- if $fallback_https }}
+    listen {{ $globals.external_https_port }} ssl http2 default_server;
+            {{- if $globals.enable_ipv6 }}
+    listen [::]:{{ $globals.external_https_port }} ssl http2 default_server;
+            {{- end }}
+        {{- end }}
+    {{ $globals.access_log }}
+        {{- if $globals.default_cert_ok }}
     ssl_session_cache shared:SSL:50m;
     ssl_session_tickets off;
     ssl_certificate /etc/nginx/certs/default.crt;
     ssl_certificate_key /etc/nginx/certs/default.key;
-{{- end }}
+        {{- else }}
-}
+    # No default.crt certificate found for this vhost, so force nginx to emit a
-
+    # TLS error if the client connects via https.
-{{- range $host, $containers := groupByMulti $globals.containers "Env.VIRTUAL_HOST" "," }}
+    {{- /* See the comment in the main `server` directive for rationale. */}}
-
+    ssl_ciphers aNULL;
-    {{- $host := trim $host }}
+    set $empty "";
-    {{- if not $host }}
+    ssl_certificate data:$empty;
-        {{- /* Ignore containers with VIRTUAL_HOST set to the empty string. */}}
+    ssl_certificate_key data:$empty;
-        {{- continue }}
+    if ($https) {
+        return 444;
+    }
         {{- end }}
+    return 503;
+}
+    {{- end }}
+{{- end }}
+
+{{- range $host, $vhost := $globals.vhosts }}
+    {{- $cert := $vhost.cert }}
+    {{- $cert_ok := $vhost.cert_ok }}
+    {{- $containers := $vhost.containers }}
+    {{- $default_server := when $vhost.default "default_server" "" }}
+    {{- $https_method := $vhost.https_method }}
+
     {{- $is_regexp := hasPrefix "~" $host }}
     {{- $upstream_name := when (or $is_regexp $globals.sha1_upstream_name) (sha1 $host) $host }}
 
@@ -358,22 +463,12 @@ server {
 {{ template "upstream" (dict "globals" $globals "Upstream" $upstream "Containers" $containers) }}
     {{- end }}
 
-    {{- $default_host := or ($globals.Env.DEFAULT_HOST) "" }}
-    {{- $default_server := index (dict $host "" $default_host "default_server") $host }}
-
     {{- /*
          * Get the SERVER_TOKENS defined by containers w/ the same vhost,
          * falling back to "".
          */}}
     {{- $server_tokens := trim (or (first (groupByKeys $containers "Env.SERVER_TOKENS")) "") }}
 
-
-    {{- /*
-         * Get the HTTPS_METHOD defined by containers w/ the same vhost, falling
-         * back to "redirect".
-         */}}
-    {{- $https_method := or (first (groupByKeys $containers "Env.HTTPS_METHOD")) (or $globals.Env.HTTPS_METHOD "redirect") }}
-
     {{- /*
          * Get the SSL_POLICY defined by containers w/ the same vhost, falling
          * back to empty string (use default).
@@ -389,29 +484,7 @@ server {
     {{- /* Get the VIRTUAL_ROOT By containers w/ use fastcgi root */}}
     {{- $vhost_root := or (first (groupByKeys $containers "Env.VIRTUAL_ROOT")) "/var/www/public" }}
 
-
+    {{- if and $cert_ok (eq $https_method "redirect") }}
-    {{- /* Get the first cert name defined by containers w/ the same vhost */}}
-    {{- $certName := (first (groupByKeys $containers "Env.CERT_NAME")) }}
-
-    {{- /* Get the best matching cert by name for the vhost. */}}
-    {{- $vhostCert := (closest (dir "/etc/nginx/certs") (printf "%s.crt" $host))}}
-
-    {{- /*
-         * vhostCert is actually a filename so remove any suffixes since they
-         * are added later.
-         */}}
-    {{- $vhostCert := trimSuffix ".crt" $vhostCert }}
-    {{- $vhostCert := trimSuffix ".key" $vhostCert }}
-
-    {{- /*
-         * Use the cert specified on the container or fallback to the best vhost
-         * match.
-         */}}
-    {{- $cert := (coalesce $certName $vhostCert) }}
-
-    {{- $is_https := (and (ne $https_method "nohttps") (ne $cert "") (exists (printf "/etc/nginx/certs/%s.crt" $cert)) (exists (printf "/etc/nginx/certs/%s.key" $cert))) }}
-
-    {{- if and $is_https (eq $https_method "redirect") }}
 server {
     server_name {{ $host }};
         {{- if $server_tokens }}
@@ -449,18 +522,19 @@ server {
     server_tokens {{ $server_tokens }};
     {{- end }}
     {{ $globals.access_log }}
-    {{- if or (not $is_https) (eq $https_method "noredirect") }}
+    {{- if or (eq $https_method "nohttps") (not $cert_ok) (eq $https_method "noredirect") }}
     listen {{ $globals.external_http_port }} {{ $default_server }};
         {{- if $globals.enable_ipv6 }}
     listen [::]:{{ $globals.external_http_port }} {{ $default_server }};
         {{- end }}
     {{- end }}
-    {{- if $is_https }}
+    {{- if ne $https_method "nohttps" }}
     listen {{ $globals.external_https_port }} ssl http2 {{ $default_server }};
         {{- if $globals.enable_ipv6 }}
     listen [::]:{{ $globals.external_https_port }} ssl http2 {{ $default_server }};
         {{- end }}
 
+        {{- if $cert_ok }}
             {{- template "ssl_policy" (dict "ssl_policy" $ssl_policy) }}
 
     ssl_session_timeout 5m;
@@ -487,6 +561,34 @@ server {
     }
     add_header Strict-Transport-Security $sts_header always;
             {{- end }}
+        {{- else if $globals.default_cert_ok }}
+    # No certificate found for this vhost, so use the default certificate and
+    # return an error code if the user connects via https.
+    ssl_certificate /etc/nginx/certs/default.crt;
+    ssl_certificate_key /etc/nginx/certs/default.key;
+    if ($https) {
+        return 500;
+    }
+        {{- else }}
+    # No certificate found for this vhost, so force nginx to emit a TLS error if
+    # the client connects via https.
+            {{- /*
+                 * The alternative is to not provide an https server for this
+                 * vhost, which would either cause the user to see the wrong
+                 * vhost (if there is another vhost with a certificate) or a
+                 * connection refused error (if there is no other vhost with a
+                 * certificate).  A TLS error is easier to troubleshoot, and is
+                 * safer than serving the wrong vhost.  Also see
+                 * <https://serverfault.com/a/1044022>.
+                 */}}
+    ssl_ciphers aNULL;
+    set $empty "";
+    ssl_certificate data:$empty;
+    ssl_certificate_key data:$empty;
+    if ($https) {
+        return 444;
+    }
+        {{- end }}
     {{- end }}
 
     {{- if (exists (printf "/etc/nginx/vhost.d/%s" $host)) }}
@@ -514,7 +616,7 @@ server {
             {{- $upstream = printf "%s-%s" $upstream $sum }}
             {{- $dest = (or (first (groupByKeys $containers "Env.VIRTUAL_DEST")) "") }}
         {{- end }}
-        {{- template "location" (dict "Path" $path "Proto" $proto "Upstream" $upstream "Host" $host "VhostRoot" $vhost_root "Dest" $dest "NetworkTag" $network_tag) }}
+        {{- template "location" (dict "Path" $path "Proto" $proto "Upstream" $upstream "Host" $host "VhostRoot" $vhost_root "Dest" $dest "NetworkTag" $network_tag "Containers" $containers) }}
     {{- end }}
     {{- if and (not (contains $paths "/")) (ne $globals.default_root_response "none")}}
     location / {
@@ -522,23 +624,4 @@ server {
     }
     {{- end }}
 }
-
-    {{- if (and (not $is_https) (exists "/etc/nginx/certs/default.crt") (exists "/etc/nginx/certs/default.key")) }}
-server {
-    server_name {{ $host }};
-        {{- if $server_tokens }}
-    server_tokens {{ $server_tokens }};
-        {{- end }}
-    listen {{ $globals.external_https_port }} ssl http2 {{ $default_server }};
-        {{- if $globals.enable_ipv6 }}
-    listen [::]:{{ $globals.external_https_port }} ssl http2 {{ $default_server }};
-        {{- end }}
-    {{ $globals.access_log }}
-    return 500;
-
-    ssl_certificate /etc/nginx/certs/default.crt;
-    ssl_certificate_key /etc/nginx/certs/default.key;
-}
-    {{- end }}
-
 {{- end }}

test/test_fallback.data/nodefault.certs/http-only.nginx-proxy.test.crt

@@ -0,0 +1,71 @@
+Certificate:
+    Data:
+        Version: 3 (0x2)
+        Serial Number: 4096 (0x1000)
+        Signature Algorithm: sha256WithRSAEncryption
+        Issuer: O=nginx-proxy test suite, CN=www.nginx-proxy.tld
+        Validity
+            Not Before: Feb  7 21:54:16 2023 GMT
+            Not After : Jun 25 21:54:16 2050 GMT
+        Subject: CN=http-only.nginx-proxy.test
+        Subject Public Key Info:
+            Public Key Algorithm: rsaEncryption
+                RSA Public-Key: (2048 bit)
+                Modulus:
+                    00:b4:62:61:07:54:2e:6d:55:83:2d:24:b7:e2:15:
+                    34:13:bd:79:21:e9:10:75:3f:4c:f8:ba:60:29:87:
+                    e5:8e:2a:1e:fd:33:51:5a:8a:3a:6f:60:ff:24:f1:
+                    1b:27:30:8c:ac:43:04:b7:79:cb:7a:ec:c6:08:a4:
+                    a0:15:b0:0f:ee:6b:15:84:24:11:bc:85:2b:48:06:
+                    04:0a:58:bb:8c:e8:4d:48:f5:06:c5:91:fe:5d:99:
+                    0a:29:31:8a:f1:9b:0c:e0:39:75:a1:06:9b:d4:f5:
+                    06:74:8f:46:5e:64:ba:2f:d0:3d:7c:3d:30:03:e9:
+                    7c:35:17:69:04:f6:2e:29:d4:93:d6:d6:d2:6c:04:
+                    38:06:21:06:05:30:8a:b9:9d:05:8d:12:6e:48:39:
+                    bb:f6:93:4f:ba:a5:84:c7:96:2f:be:92:25:e9:d0:
+                    95:2a:d9:23:8a:b3:28:0b:b6:19:1c:3b:be:a2:91:
+                    70:44:a8:77:18:94:4b:df:61:f4:5c:c9:78:76:34:
+                    b5:87:0f:c0:92:04:26:b6:ca:62:cd:9b:5d:eb:bf:
+                    10:ac:df:af:72:5f:af:09:38:b1:dc:e1:3d:13:db:
+                    a0:ac:b7:2e:ca:39:5c:4c:f1:1e:81:a8:b4:44:a2:
+                    72:d5:3b:c0:71:cc:dc:16:0d:fa:38:96:44:b3:00:
+                    d6:65
+                Exponent: 65537 (0x10001)
+        X509v3 extensions:
+            X509v3 Subject Alternative Name: 
+                DNS:http-only.nginx-proxy.test
+    Signature Algorithm: sha256WithRSAEncryption
+         3b:54:95:48:4d:f6:93:38:42:40:02:ab:b7:17:3b:50:3b:ca:
+         c7:12:69:b0:da:cb:d7:3e:0e:1f:bf:a2:59:c7:fe:c2:5c:43:
+         84:92:b9:3a:be:8f:7e:2e:81:3c:ed:f3:a9:77:21:c2:35:f1:
+         da:cf:3a:1e:e2:ee:a2:ce:72:55:97:87:0e:ad:59:61:f7:75:
+         46:c0:2b:d4:88:b7:36:97:11:fb:5e:28:89:e9:2a:92:f1:15:
+         f1:43:8e:c1:38:85:8d:3a:26:7d:25:72:93:17:96:8d:5a:ed:
+         e8:73:3a:d5:8d:80:f2:af:38:84:ff:85:2e:d1:36:7d:2e:e1:
+         f0:2c:d8:15:5f:fc:c5:70:5d:25:6a:22:f3:2a:cd:0f:25:ad:
+         d4:93:d3:9a:3e:50:bc:da:a5:6c:86:ea:1d:d9:b9:c5:90:db:
+         f5:02:c8:c9:77:5c:ef:77:fe:74:60:41:33:d9:3c:a2:e1:73:
+         aa:14:18:5d:36:58:c8:41:63:4c:59:0e:4b:3d:c5:65:5a:01:
+         b0:16:50:0f:d0:4f:0d:ca:97:f6:11:47:06:6b:b1:ae:bb:26:
+         30:34:8b:7a:91:5d:8a:22:c7:f9:05:0d:bb:a5:b7:60:c0:20:
+         ce:d0:0e:c0:66:b3:e7:c4:61:ec:c5:40:e6:52:11:41:c3:11:
+         18:04:c7:1e
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----

test/test_fallback.data/nodefault.certs/http-only.nginx-proxy.test.key

@@ -0,0 +1,27 @@
+-----BEGIN RSA PRIVATE KEY-----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+-----END RSA PRIVATE KEY-----

test/test_fallback.data/nodefault.certs/https-and-http.nginx-proxy.test.crt

@@ -0,0 +1,71 @@
+Certificate:
+    Data:
+        Version: 3 (0x2)
+        Serial Number: 4096 (0x1000)
+        Signature Algorithm: sha256WithRSAEncryption
+        Issuer: O=nginx-proxy test suite, CN=www.nginx-proxy.tld
+        Validity
+            Not Before: Feb  7 21:53:19 2023 GMT
+            Not After : Jun 25 21:53:19 2050 GMT
+        Subject: CN=https-and-http.nginx-proxy.test
+        Subject Public Key Info:
+            Public Key Algorithm: rsaEncryption
+                RSA Public-Key: (2048 bit)
+                Modulus:
+                    00:b7:97:85:d1:7f:6b:50:29:f3:87:b7:4e:f5:25:
+                    40:6a:d8:fa:a1:63:3c:4a:2e:68:4a:c6:8b:38:df:
+                    07:81:d0:08:9d:fc:17:f5:37:28:7f:31:e6:f3:81:
+                    28:4e:22:b6:bd:a2:4e:f2:2f:e5:0f:dd:55:3c:e1:
+                    04:84:4c:45:1b:1a:ae:b7:f0:2a:da:43:05:71:91:
+                    92:b8:d1:49:fe:80:0a:53:b9:66:da:54:60:9a:fc:
+                    e1:b2:e8:28:48:7f:96:94:3c:92:a3:b2:37:f6:7a:
+                    c2:de:0b:12:f0:ae:4e:92:fe:2d:c1:b2:95:28:1f:
+                    88:8d:79:99:81:19:ae:22:a4:95:f5:9f:db:25:8e:
+                    1d:cf:43:cd:6f:85:93:5f:79:ee:f8:f3:d4:82:e1:
+                    e9:4d:c9:ad:ae:5b:92:43:3a:3c:71:51:70:f7:3e:
+                    bd:1b:24:52:6a:a3:cf:54:72:57:ed:fe:72:ea:96:
+                    9b:5a:02:02:a7:df:85:b7:68:ae:1e:07:77:9f:59:
+                    a5:a0:8b:28:c2:c8:b7:bb:8a:42:50:df:05:73:bf:
+                    9c:55:13:b5:82:79:77:40:57:a4:8f:88:a5:71:50:
+                    d7:70:b0:4d:0c:d9:86:b3:9b:db:8a:20:bd:19:68:
+                    10:52:2d:53:ba:0e:2e:1c:ad:80:54:bb:b6:c9:ab:
+                    11:39
+                Exponent: 65537 (0x10001)
+        X509v3 extensions:
+            X509v3 Subject Alternative Name: 
+                DNS:https-and-http.nginx-proxy.test
+    Signature Algorithm: sha256WithRSAEncryption
+         2c:f3:e5:47:3f:8e:5a:28:b1:df:e5:95:50:85:6f:27:2f:a6:
+         8d:f1:5e:cf:df:e2:52:66:97:61:36:59:81:26:25:19:99:c9:
+         93:e5:85:cb:ca:69:af:4b:21:a3:d2:7a:bf:b5:5e:2d:42:fb:
+         99:f8:22:58:e5:bf:79:b8:8a:74:7e:c6:94:14:d9:f2:27:63:
+         b6:e5:74:21:5b:59:fb:f6:c8:a9:28:fb:60:f7:5e:bd:c2:e6:
+         74:24:14:96:61:95:6c:c2:66:b4:52:25:a1:85:5a:97:e5:68:
+         5c:62:cf:69:3b:b0:a9:56:d8:e3:5f:74:dc:84:18:d5:3e:4f:
+         c9:35:39:26:88:dc:9b:80:d9:40:e1:4f:09:27:8d:d2:89:55:
+         30:91:02:86:35:04:95:1e:1d:58:14:5b:c6:e0:2e:a7:bf:a8:
+         f6:2b:76:8a:4e:71:79:bc:c0:04:cd:db:81:73:46:ce:68:ed:
+         25:b0:0e:42:8d:96:64:77:3b:f4:9d:1a:c9:f6:78:4c:56:4f:
+         92:17:29:3d:80:50:71:77:4b:a8:29:c2:12:fc:ad:0a:37:81:
+         38:4c:fb:54:99:4d:12:5f:98:dc:d1:a9:7b:08:45:c4:6f:7e:
+         fe:00:e0:db:79:fe:d1:28:e3:8e:82:d1:fb:bc:0a:c4:42:93:
+         c9:5e:eb:ba
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----

test/test_fallback.data/nodefault.certs/https-and-http.nginx-proxy.test.key

@@ -0,0 +1,27 @@
+-----BEGIN RSA PRIVATE KEY-----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+-----END RSA PRIVATE KEY-----

test/test_fallback.data/nodefault.certs/https-only.nginx-proxy.test.crt

@@ -0,0 +1,71 @@
+Certificate:
+    Data:
+        Version: 3 (0x2)
+        Serial Number: 4096 (0x1000)
+        Signature Algorithm: sha256WithRSAEncryption
+        Issuer: O=nginx-proxy test suite, CN=www.nginx-proxy.tld
+        Validity
+            Not Before: Feb  7 21:53:49 2023 GMT
+            Not After : Jun 25 21:53:49 2050 GMT
+        Subject: CN=https-only.nginx-proxy.test
+        Subject Public Key Info:
+            Public Key Algorithm: rsaEncryption
+                RSA Public-Key: (2048 bit)
+                Modulus:
+                    00:d9:87:48:02:85:f4:5f:0d:90:7e:4c:4f:13:89:
+                    41:ca:41:15:c2:6f:fd:a8:c7:17:83:c6:dd:8c:fe:
+                    19:a4:b2:6b:0b:35:4f:b4:3d:7c:40:0a:04:33:2a:
+                    fd:10:72:f7:63:63:99:5b:3d:ec:78:ee:c6:4d:c8:
+                    0e:4c:be:f2:3f:e3:02:74:57:9a:c1:fe:15:95:63:
+                    4e:e7:2c:eb:70:f2:6b:c8:ba:01:a2:ca:a1:c7:76:
+                    ff:38:e4:c2:b0:66:fc:85:d2:af:0f:22:81:d4:82:
+                    eb:d5:b0:e6:69:14:37:dd:8d:ad:29:ce:93:68:5a:
+                    ce:f4:77:76:6f:78:13:b6:c8:2f:fe:e0:b6:7e:fb:
+                    29:16:be:e2:f5:45:3b:39:5b:52:dc:26:b7:ca:0c:
+                    b6:1c:fc:a8:38:0b:dd:c1:f4:04:9b:2d:38:c9:a5:
+                    2d:3e:f1:42:88:53:a2:3b:17:cf:d5:3c:2b:d6:6a:
+                    7f:6f:05:8d:c5:b7:5d:64:1e:83:1b:e7:ec:80:3d:
+                    6d:34:c1:66:b2:e6:5d:d9:a7:6e:46:75:14:bf:10:
+                    16:c5:fc:47:8e:63:fa:e5:b4:bd:f2:b9:e0:cb:ea:
+                    75:f9:68:ee:7d:8f:ea:8f:1a:9f:34:27:7a:4a:9f:
+                    85:fd:3e:17:a7:96:c3:d0:4e:50:a2:a2:e0:45:92:
+                    d0:b5
+                Exponent: 65537 (0x10001)
+        X509v3 extensions:
+            X509v3 Subject Alternative Name: 
+                DNS:https-only.nginx-proxy.test
+    Signature Algorithm: sha256WithRSAEncryption
+         8a:52:46:42:a9:74:18:6a:52:90:ef:a4:e9:c5:54:d5:97:3a:
+         ff:8b:c2:76:4f:9e:47:aa:e1:ea:e5:b9:af:9d:33:e3:85:17:
+         54:7d:32:bd:ac:90:3f:5c:d2:a1:42:17:52:2b:b1:83:e5:c3:
+         bf:81:f0:e7:38:e2:88:67:7b:d8:59:fe:f9:94:99:ba:be:f4:
+         3c:24:b2:c7:9e:f0:98:21:c6:2d:c2:e8:f3:67:bd:62:00:aa:
+         ce:34:fa:b4:53:6d:c1:09:5e:55:bd:43:aa:86:c6:f8:c5:83:
+         46:3a:49:12:a2:ec:30:36:0c:99:44:74:09:9d:cc:4b:98:1f:
+         7e:c9:9b:68:a0:f8:1e:00:14:d0:da:2a:bf:c8:ca:a8:1c:10:
+         b5:68:a2:f1:41:93:0c:f3:3f:c0:c6:53:3c:8d:a7:dd:a5:7b:
+         35:cc:44:e0:5b:6d:c5:cb:33:6f:c1:43:7e:06:df:21:99:11:
+         b3:91:41:b4:5e:f0:37:1e:8e:e5:73:85:dc:4a:21:d5:41:f9:
+         4e:b8:f5:ed:21:93:09:91:c2:8c:6b:04:a4:84:ab:3a:fe:35:
+         64:fa:6b:a7:8d:40:a6:64:89:30:84:ac:28:99:5a:01:79:77:
+         c0:df:88:da:a9:75:5f:c4:51:ae:a8:45:7b:d2:e1:a2:81:29:
+         60:cd:7b:cd
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----

test/test_fallback.data/nodefault.certs/https-only.nginx-proxy.test.key

@@ -0,0 +1,27 @@
+-----BEGIN RSA PRIVATE KEY-----
+MIIEowIBAAKCAQEA2YdIAoX0Xw2QfkxPE4lBykEVwm/9qMcXg8bdjP4ZpLJrCzVP
+tD18QAoEMyr9EHL3Y2OZWz3seO7GTcgOTL7yP+MCdFeawf4VlWNO5yzrcPJryLoB
+osqhx3b/OOTCsGb8hdKvDyKB1ILr1bDmaRQ33Y2tKc6TaFrO9Hd2b3gTtsgv/uC2
+fvspFr7i9UU7OVtS3Ca3ygy2HPyoOAvdwfQEmy04yaUtPvFCiFOiOxfP1Twr1mp/
+bwWNxbddZB6DG+fsgD1tNMFmsuZd2aduRnUUvxAWxfxHjmP65bS98rngy+p1+Wju
+fY/qjxqfNCd6Sp+F/T4Xp5bD0E5QoqLgRZLQtQIDAQABAoIBAAWs//YA5MVuJy0E
+dLO/yxWp6RVvsqCqwTRRBgrdvnGLrjtWosPDLvDE0iM7peq99TKEsMWusfLd2BLD
+e4wJF20PUUsT1hflt050juR9SY9i4+kS4WQMAXig5DvpzCKqLUCYpLSyY8zVta2X
+tgtb2bFQNwp2N2ZrqCa8zzxNV8ZXGoW+ZlvBJEDtBwt1DCDhY39/pqHfIhFl4Vwk
+YhhbVjID145D1j/fP6vLceM2YA4uRmF1itj1iQ6YNNpXRspUGE4DXdqR6HcbduiX
+trZjmdtKXY8mJg6jyLZxYbjFlKV/LvqKRYF3Jb9K0vdd4juBdZoy7DQzoLhcnzui
+pEnPLakCgYEA9tN6KdQGKGBXGuF+ZqhXfB/XSkKUf8o/5j62cbu11ZIJ+iEBx+d6
+lQAxTz5hHUL6a3c5qiM+AWBxYuFD6oqptIlTlBfIXI978neDNvEWWffivPvQLbt9
+o9ohOirfK1iGPvtrpAwjv5ylE5SiTmJ/6wDvQWjNGAnJ3aaxkesJUSMCgYEA4Z0K
+UHZVtnKLtzzIY7KfLbuKF/fJEDfMNr4Wgl6ny21vqO9kJGmA7SaoNdhx8RDcKmeV
+/Vey4ug6YlOG48eapKLTthdRz5mx+jIkUfdOhj81m28xm/OPTqCrviTHCNOHeYDy
+NKAIlJMo2z0vTKJn5eP6CsYmDWLpHQNyXY5qcEcCgYAzDBWt5O3JF/Or2Yr8zEAb
+qbIq544yx69jfQDakMnQe72Yf48Quuz9N+b6zpnjJWEJLMU+TL+cJUgN/SzAqyDh
+96zTaf/ENOCbiuAWUtIelUfNcf7iFm6rnodUsl0pZ8uL5w+iA+i4zjrNy+WtdG2k
+OrNAwd345L1dHAaJeSSaJQKBgQCUnF3r7Fa/TCpt87LHwSQK+sqWyRf+/9IbiRDI
+pVL/s8FmVPHw7jIHhHwuo7lCImnz4LGy5C6oOnIizIRAy/04Ty0Hd8ri5YmPlbHI
+8A8gbMiB7zeNU1zlXP5jzFPyo2tMhLyGH5gnTdwOtfnPD/dCPe45ZJYyISIOg3O0
+3peMBwKBgH20cskAOCNclfoG+Nis52h8FqmDlflJ8waUarvk26JhO1e009kOytw8
+x/qSuttpGtTG+4fdc2wJvFNczr4h9ZlftBdgZXj8PKgRpcIe8q97Xg8PUj+Xfu/t
+vD/QV+tVcGoAMsQq4NeFxiTbPfwVyXdYFT1XVCu6JEdLL+gpWh5W
+-----END RSA PRIVATE KEY-----

test/test_fallback.data/nodefault.yml

@@ -0,0 +1,36 @@
+services:
+  sut:
+    image: nginxproxy/nginx-proxy:test
+    volumes:
+      - /var/run/docker.sock:/tmp/docker.sock:ro
+      - ./nodefault.certs:/etc/nginx/certs:ro
+  https-and-http:
+    image: web
+    expose:
+      - "81"
+    environment:
+      WEB_PORTS: "81"
+      VIRTUAL_HOST: https-and-http.nginx-proxy.test
+  https-only:
+    image: web
+    expose:
+      - "82"
+    environment:
+      WEB_PORTS: "82"
+      VIRTUAL_HOST: https-only.nginx-proxy.test
+      HTTPS_METHOD: nohttp
+  http-only:
+    image: web
+    expose:
+      - "83"
+    environment:
+      WEB_PORTS: "83"
+      VIRTUAL_HOST: http-only.nginx-proxy.test
+      HTTPS_METHOD: nohttps
+  missing-cert:
+    image: web
+    expose:
+      - "84"
+    environment:
+      WEB_PORTS: "84"
+      VIRTUAL_HOST: missing-cert.nginx-proxy.test

test/test_fallback.data/nohttp-on-app.yml

@@ -0,0 +1,16 @@
+services:
+  sut:
+    image: nginxproxy/nginx-proxy:test
+    volumes:
+      - /var/run/docker.sock:/tmp/docker.sock:ro
+      - ./withdefault.certs:/etc/nginx/certs:ro
+    environment:
+      HTTPS_METHOD: redirect
+  https-only:
+    image: web
+    expose:
+      - "82"
+    environment:
+      WEB_PORTS: "82"
+      HTTPS_METHOD: nohttp
+      VIRTUAL_HOST: https-only.nginx-proxy.test

test/test_fallback.data/nohttp-with-missing-cert.yml

@@ -0,0 +1,22 @@
+services:
+  sut:
+    image: nginxproxy/nginx-proxy:test
+    volumes:
+      - /var/run/docker.sock:/tmp/docker.sock:ro
+      - ./withdefault.certs:/etc/nginx/certs:ro
+    environment:
+      HTTPS_METHOD: nohttp
+  https-only:
+    image: web
+    expose:
+      - "82"
+    environment:
+      WEB_PORTS: "82"
+      VIRTUAL_HOST: https-only.nginx-proxy.test
+  missing-cert:
+    image: web
+    expose:
+      - "84"
+    environment:
+      WEB_PORTS: "84"
+      VIRTUAL_HOST: missing-cert.nginx-proxy.test

test/test_fallback.data/nohttp.yml

@@ -0,0 +1,15 @@
+services:
+  sut:
+    image: nginxproxy/nginx-proxy:test
+    volumes:
+      - /var/run/docker.sock:/tmp/docker.sock:ro
+      - ./withdefault.certs:/etc/nginx/certs:ro
+    environment:
+      HTTPS_METHOD: nohttp
+  https-only:
+    image: web
+    expose:
+      - "82"
+    environment:
+      WEB_PORTS: "82"
+      VIRTUAL_HOST: https-only.nginx-proxy.test

test/test_fallback.data/nohttps-on-app.yml

@@ -0,0 +1,15 @@
+services:
+  sut:
+    image: nginxproxy/nginx-proxy:test
+    volumes:
+      - /var/run/docker.sock:/tmp/docker.sock:ro
+    environment:
+      HTTPS_METHOD: redirect
+  http-only:
+    image: web
+    expose:
+      - "83"
+    environment:
+      WEB_PORTS: "83"
+      HTTPS_METHOD: nohttps
+      VIRTUAL_HOST: http-only.nginx-proxy.test

test/test_fallback.data/nohttps.yml

@@ -0,0 +1,14 @@
+services:
+  sut:
+    image: nginxproxy/nginx-proxy:test
+    volumes:
+      - /var/run/docker.sock:/tmp/docker.sock:ro
+    environment:
+      HTTPS_METHOD: nohttps
+  http-only:
+    image: web
+    expose:
+      - "83"
+    environment:
+      WEB_PORTS: "83"
+      VIRTUAL_HOST: http-only.nginx-proxy.test

test/test_fallback.data/withdefault.certs/default.crt

@@ -0,0 +1,70 @@
+Certificate:
+    Data:
+        Version: 3 (0x2)
+        Serial Number: 4096 (0x1000)
+        Signature Algorithm: sha256WithRSAEncryption
+        Issuer: O=nginx-proxy test suite, CN=www.nginx-proxy.tld
+        Validity
+            Not Before: Feb  9 04:02:23 2023 GMT
+            Not After : Jun 27 04:02:23 2050 GMT
+        Subject: CN=*.nginx-proxy.test
+        Subject Public Key Info:
+            Public Key Algorithm: rsaEncryption
+                RSA Public-Key: (2048 bit)
+                Modulus:
+                    00:db:bd:54:de:01:7e:82:4e:c0:f1:5d:12:fd:3a:
+                    fb:21:19:4d:44:25:47:ea:ad:d8:11:5c:d1:65:88:
+                    af:49:fc:8e:4b:c3:01:c1:0d:6d:22:67:bd:31:66:
+                    9f:4a:50:17:9e:47:b3:3b:b3:21:73:1f:81:55:73:
+                    52:47:9b:fb:85:6b:e8:d8:09:cc:e1:7d:1c:14:03:
+                    1c:ae:84:b4:5b:e5:e5:c7:71:fc:1f:74:33:4f:ae:
+                    f7:8d:21:1f:55:8d:93:c7:84:4d:93:01:a1:1c:37:
+                    ae:85:5c:70:2c:21:ec:87:35:c3:86:d3:b3:0f:9a:
+                    b0:9d:8a:cd:0e:49:e8:99:c5:4c:50:bd:a8:6e:a7:
+                    01:3e:a7:dc:cf:c3:48:37:8e:c6:8a:89:b0:41:01:
+                    58:ee:45:94:fa:90:eb:df:c8:0e:b7:dd:79:75:13:
+                    1e:07:69:ee:54:47:92:18:9d:e0:a9:ee:4e:22:d1:
+                    f4:a2:4d:a1:47:ed:9b:35:2a:70:cc:66:fb:3e:f0:
+                    49:f7:ee:62:2a:27:a1:d3:52:7b:ff:e9:12:d9:5b:
+                    6b:f6:18:bf:9c:9d:5f:00:29:d2:54:b5:f8:a4:a2:
+                    9b:3f:fe:a6:ed:14:ae:a0:fe:13:33:18:33:17:a9:
+                    8b:fe:fc:75:65:0c:fb:c2:d1:1e:81:ca:43:89:bd:
+                    78:dd
+                Exponent: 65537 (0x10001)
+        X509v3 extensions:
+            X509v3 Subject Alternative Name: 
+                DNS:*.nginx-proxy.test
+    Signature Algorithm: sha256WithRSAEncryption
+         43:a7:1f:4b:ec:ff:1d:70:c7:f8:6e:eb:fd:15:25:27:b2:54:
+         c7:92:cf:ed:51:31:28:56:76:5c:da:8b:17:31:55:8c:a1:c2:
+         37:95:27:7b:b6:58:e5:92:ef:1e:fe:35:f1:44:ca:c7:1b:7b:
+         75:bf:e1:91:61:6d:8a:6f:35:8b:73:f4:d9:08:60:25:07:7a:
+         3e:c2:79:e7:ae:b4:70:cc:8a:30:cb:80:aa:47:1a:40:82:00:
+         a0:5e:01:67:d1:95:21:3c:b1:52:7d:f5:87:b6:43:41:df:b2:
+         a7:ee:3b:73:17:c4:19:2c:6b:7b:3c:26:9e:4c:00:e3:e8:07:
+         f2:e1:a1:31:79:57:be:b6:b1:a7:93:70:4e:e1:7d:bf:08:c5:
+         e7:a0:de:7d:82:20:24:f7:b0:3f:c2:94:36:88:ef:7b:7d:c0:
+         7f:8a:78:a1:8e:56:42:82:ce:82:e6:8e:3d:1b:b7:ca:dd:a9:
+         a8:e6:f9:a3:f4:4a:a4:a0:9c:15:6f:44:8c:48:20:e5:85:ed:
+         6f:85:22:41:1d:1f:fe:58:e5:43:ad:f2:c4:10:5a:10:ed:36:
+         10:98:ad:73:97:6a:e0:19:18:d6:32:26:03:3d:dd:84:5c:2e:
+         97:ca:a2:f5:63:f2:7a:16:f1:55:ca:d2:a1:54:09:8a:bb:23:
+         f0:53:36:51
+-----BEGIN CERTIFICATE-----
+MIIC+zCCAeOgAwIBAgICEAAwDQYJKoZIhvcNAQELBQAwPzEfMB0GA1UECgwWbmdp
+bngtcHJveHkgdGVzdCBzdWl0ZTEcMBoGA1UEAwwTd3d3Lm5naW54LXByb3h5LnRs
+ZDAgFw0yMzAyMDkwNDAyMjNaGA8yMDUwMDYyNzA0MDIyM1owHTEbMBkGA1UEAwwS
+Ki5uZ2lueC1wcm94eS50ZXN0MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKC
+AQEA271U3gF+gk7A8V0S/Tr7IRlNRCVH6q3YEVzRZYivSfyOS8MBwQ1tIme9MWaf
+SlAXnkezO7Mhcx+BVXNSR5v7hWvo2AnM4X0cFAMcroS0W+Xlx3H8H3QzT673jSEf
+VY2Tx4RNkwGhHDeuhVxwLCHshzXDhtOzD5qwnYrNDknomcVMUL2obqcBPqfcz8NI
+N47GiomwQQFY7kWU+pDr38gOt915dRMeB2nuVEeSGJ3gqe5OItH0ok2hR+2bNSpw
+zGb7PvBJ9+5iKieh01J7/+kS2Vtr9hi/nJ1fACnSVLX4pKKbP/6m7RSuoP4TMxgz
+F6mL/vx1ZQz7wtEegcpDib143QIDAQABoyEwHzAdBgNVHREEFjAUghIqLm5naW54
+LXByb3h5LnRlc3QwDQYJKoZIhvcNAQELBQADggEBAEOnH0vs/x1wx/hu6/0VJSey
+VMeSz+1RMShWdlzaixcxVYyhwjeVJ3u2WOWS7x7+NfFEyscbe3W/4ZFhbYpvNYtz
+9NkIYCUHej7CeeeutHDMijDLgKpHGkCCAKBeAWfRlSE8sVJ99Ye2Q0HfsqfuO3MX
+xBksa3s8Jp5MAOPoB/LhoTF5V762saeTcE7hfb8Ixeeg3n2CICT3sD/ClDaI73t9
+wH+KeKGOVkKCzoLmjj0bt8rdqajm+aP0SqSgnBVvRIxIIOWF7W+FIkEdH/5Y5UOt
+8sQQWhDtNhCYrXOXauAZGNYyJgM93YRcLpfKovVj8noW8VXK0qFUCYq7I/BTNlE=
+-----END CERTIFICATE-----

test/test_fallback.data/withdefault.certs/default.key

@@ -0,0 +1,27 @@
+-----BEGIN RSA PRIVATE KEY-----
+MIIEowIBAAKCAQEA271U3gF+gk7A8V0S/Tr7IRlNRCVH6q3YEVzRZYivSfyOS8MB
+wQ1tIme9MWafSlAXnkezO7Mhcx+BVXNSR5v7hWvo2AnM4X0cFAMcroS0W+Xlx3H8
+H3QzT673jSEfVY2Tx4RNkwGhHDeuhVxwLCHshzXDhtOzD5qwnYrNDknomcVMUL2o
+bqcBPqfcz8NIN47GiomwQQFY7kWU+pDr38gOt915dRMeB2nuVEeSGJ3gqe5OItH0
+ok2hR+2bNSpwzGb7PvBJ9+5iKieh01J7/+kS2Vtr9hi/nJ1fACnSVLX4pKKbP/6m
+7RSuoP4TMxgzF6mL/vx1ZQz7wtEegcpDib143QIDAQABAoIBAGUd9QXMTjkMoIDx
+QaHCGHocuI+ZUETQBtPGkJ1WjsNPMvPuIsqBsSzZ7Bflj3uU66lseTAJuGTPpKZ7
+0Ose/llhVN7Fc8B34AndfL9aVdzMKDblXw3iXRJYA5awHUkzQ0PWwBPb9hWUEf1Q
+klXcrolx1i4fEREnMArvKnlezWikpXcqDYRcmUfEvVozaq75heavHpOcOq2dg7vo
+N/gcJmfG4aDOhrZC1f22u5cNePvbVj+DdXOUHMEEfXOFbxk97VhmcIaH75ugvVh4
+EMMg87mcGLZiqPO5k6SYcuGyquc32Tf5sK80mpt/+SAEHCvSmUt9c1ynQrS9IhNp
+OGfZhQkCgYEA+LonwScVGVEgHg1A9E7BKhIrgUOlwWNM43s+o8Uuz1T72VUVZ6N/
+aO0+2Panw1qjsb0CUC2zft3zZTiZd81gWRmBYQ0R9dHWyWHbJlOv8rAmJ+60Gr2a
+UVTLHEdZKx6svSDNhL0HfxxfWwePgHB4NVa2RUA3KQ5y5C96EXb8WbsCgYEA4iow
+nIIbRZ9ILDz1oThxE+dFifKWXWFOwa58EFBY+/y34itL7kXRu2+4ZIltwL0L8m5j
+GUALUabuoOASKg4CFBhCvoAAlWZRr6L6EOecrElUnrefUrKuCWPCVo3MnCMuLXDp
+p1mEGIwEZBCY+jrSBMrRCawsMRkcymLJhEBFYkcCgYB6xIey0vObF2ve6XPSIr09
+YtKObzF1jun4rnBwrXc5Zx0YXOK/0PemdtO6i6SqzCZYKI7nvGcIi80DfThi5cBU
+uj4eBTGEQBrgM6jT9iK2izOKKkxDlqqA0nWec6kTm4Rvpa1Lg3Ibz4lRiR3Pq7Pp
+v+8fp16SqUsUTkrWLADK2QKBgCRIhHf3X4yx2xBNz1JIDcwVpFBXPMxKWio0Ze7w
+FPaIOq/sJkhZpyYc7EYkzhjHu2zvTLK2VZqJ32qrx/47NRYoNjz9qBpPyfcVfGzN
+25LASPUVnFfWFpmnCXx9T0AVXMkpfjK857ZQcDvldcVfPmZKa3LTzlsqHjZR1uaC
+sR7tAoGBANBfInPZVZRJfqqkPN1K8j4P7uCGjTIBmys/vxoilh1d0scTgZrdqt92
+EKi/3UsJW2ndqQNDLbvi5kcW8a6UU3UB1LLvpyQ5zuS81x3+kKfv+5cDM8rt/M4A
+MXnJA5eDZZ4SlHFzdblUv/MZdT+1x0tivMn3zFKNNj2SmaSGkQ0m
+-----END RSA PRIVATE KEY-----

test/test_fallback.data/withdefault.certs/http-only.nginx-proxy.test.crt

@@ -0,0 +1,71 @@
+Certificate:
+    Data:
+        Version: 3 (0x2)
+        Serial Number: 4096 (0x1000)
+        Signature Algorithm: sha256WithRSAEncryption
+        Issuer: O=nginx-proxy test suite, CN=www.nginx-proxy.tld
+        Validity
+            Not Before: Feb  7 21:54:16 2023 GMT
+            Not After : Jun 25 21:54:16 2050 GMT
+        Subject: CN=http-only.nginx-proxy.test
+        Subject Public Key Info:
+            Public Key Algorithm: rsaEncryption
+                RSA Public-Key: (2048 bit)
+                Modulus:
+                    00:b4:62:61:07:54:2e:6d:55:83:2d:24:b7:e2:15:
+                    34:13:bd:79:21:e9:10:75:3f:4c:f8:ba:60:29:87:
+                    e5:8e:2a:1e:fd:33:51:5a:8a:3a:6f:60:ff:24:f1:
+                    1b:27:30:8c:ac:43:04:b7:79:cb:7a:ec:c6:08:a4:
+                    a0:15:b0:0f:ee:6b:15:84:24:11:bc:85:2b:48:06:
+                    04:0a:58:bb:8c:e8:4d:48:f5:06:c5:91:fe:5d:99:
+                    0a:29:31:8a:f1:9b:0c:e0:39:75:a1:06:9b:d4:f5:
+                    06:74:8f:46:5e:64:ba:2f:d0:3d:7c:3d:30:03:e9:
+                    7c:35:17:69:04:f6:2e:29:d4:93:d6:d6:d2:6c:04:
+                    38:06:21:06:05:30:8a:b9:9d:05:8d:12:6e:48:39:
+                    bb:f6:93:4f:ba:a5:84:c7:96:2f:be:92:25:e9:d0:
+                    95:2a:d9:23:8a:b3:28:0b:b6:19:1c:3b:be:a2:91:
+                    70:44:a8:77:18:94:4b:df:61:f4:5c:c9:78:76:34:
+                    b5:87:0f:c0:92:04:26:b6:ca:62:cd:9b:5d:eb:bf:
+                    10:ac:df:af:72:5f:af:09:38:b1:dc:e1:3d:13:db:
+                    a0:ac:b7:2e:ca:39:5c:4c:f1:1e:81:a8:b4:44:a2:
+                    72:d5:3b:c0:71:cc:dc:16:0d:fa:38:96:44:b3:00:
+                    d6:65
+                Exponent: 65537 (0x10001)
+        X509v3 extensions:
+            X509v3 Subject Alternative Name: 
+                DNS:http-only.nginx-proxy.test
+    Signature Algorithm: sha256WithRSAEncryption
+         3b:54:95:48:4d:f6:93:38:42:40:02:ab:b7:17:3b:50:3b:ca:
+         c7:12:69:b0:da:cb:d7:3e:0e:1f:bf:a2:59:c7:fe:c2:5c:43:
+         84:92:b9:3a:be:8f:7e:2e:81:3c:ed:f3:a9:77:21:c2:35:f1:
+         da:cf:3a:1e:e2:ee:a2:ce:72:55:97:87:0e:ad:59:61:f7:75:
+         46:c0:2b:d4:88:b7:36:97:11:fb:5e:28:89:e9:2a:92:f1:15:
+         f1:43:8e:c1:38:85:8d:3a:26:7d:25:72:93:17:96:8d:5a:ed:
+         e8:73:3a:d5:8d:80:f2:af:38:84:ff:85:2e:d1:36:7d:2e:e1:
+         f0:2c:d8:15:5f:fc:c5:70:5d:25:6a:22:f3:2a:cd:0f:25:ad:
+         d4:93:d3:9a:3e:50:bc:da:a5:6c:86:ea:1d:d9:b9:c5:90:db:
+         f5:02:c8:c9:77:5c:ef:77:fe:74:60:41:33:d9:3c:a2:e1:73:
+         aa:14:18:5d:36:58:c8:41:63:4c:59:0e:4b:3d:c5:65:5a:01:
+         b0:16:50:0f:d0:4f:0d:ca:97:f6:11:47:06:6b:b1:ae:bb:26:
+         30:34:8b:7a:91:5d:8a:22:c7:f9:05:0d:bb:a5:b7:60:c0:20:
+         ce:d0:0e:c0:66:b3:e7:c4:61:ec:c5:40:e6:52:11:41:c3:11:
+         18:04:c7:1e
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----

test/test_fallback.data/withdefault.certs/http-only.nginx-proxy.test.key

@@ -0,0 +1,27 @@
+-----BEGIN RSA PRIVATE KEY-----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+-----END RSA PRIVATE KEY-----

test/test_fallback.data/withdefault.certs/https-and-http.nginx-proxy.test.crt

@@ -0,0 +1,71 @@
+Certificate:
+    Data:
+        Version: 3 (0x2)
+        Serial Number: 4096 (0x1000)
+        Signature Algorithm: sha256WithRSAEncryption
+        Issuer: O=nginx-proxy test suite, CN=www.nginx-proxy.tld
+        Validity
+            Not Before: Feb  7 21:53:19 2023 GMT
+            Not After : Jun 25 21:53:19 2050 GMT
+        Subject: CN=https-and-http.nginx-proxy.test
+        Subject Public Key Info:
+            Public Key Algorithm: rsaEncryption
+                RSA Public-Key: (2048 bit)
+                Modulus:
+                    00:b7:97:85:d1:7f:6b:50:29:f3:87:b7:4e:f5:25:
+                    40:6a:d8:fa:a1:63:3c:4a:2e:68:4a:c6:8b:38:df:
+                    07:81:d0:08:9d:fc:17:f5:37:28:7f:31:e6:f3:81:
+                    28:4e:22:b6:bd:a2:4e:f2:2f:e5:0f:dd:55:3c:e1:
+                    04:84:4c:45:1b:1a:ae:b7:f0:2a:da:43:05:71:91:
+                    92:b8:d1:49:fe:80:0a:53:b9:66:da:54:60:9a:fc:
+                    e1:b2:e8:28:48:7f:96:94:3c:92:a3:b2:37:f6:7a:
+                    c2:de:0b:12:f0:ae:4e:92:fe:2d:c1:b2:95:28:1f:
+                    88:8d:79:99:81:19:ae:22:a4:95:f5:9f:db:25:8e:
+                    1d:cf:43:cd:6f:85:93:5f:79:ee:f8:f3:d4:82:e1:
+                    e9:4d:c9:ad:ae:5b:92:43:3a:3c:71:51:70:f7:3e:
+                    bd:1b:24:52:6a:a3:cf:54:72:57:ed:fe:72:ea:96:
+                    9b:5a:02:02:a7:df:85:b7:68:ae:1e:07:77:9f:59:
+                    a5:a0:8b:28:c2:c8:b7:bb:8a:42:50:df:05:73:bf:
+                    9c:55:13:b5:82:79:77:40:57:a4:8f:88:a5:71:50:
+                    d7:70:b0:4d:0c:d9:86:b3:9b:db:8a:20:bd:19:68:
+                    10:52:2d:53:ba:0e:2e:1c:ad:80:54:bb:b6:c9:ab:
+                    11:39
+                Exponent: 65537 (0x10001)
+        X509v3 extensions:
+            X509v3 Subject Alternative Name: 
+                DNS:https-and-http.nginx-proxy.test
+    Signature Algorithm: sha256WithRSAEncryption
+         2c:f3:e5:47:3f:8e:5a:28:b1:df:e5:95:50:85:6f:27:2f:a6:
+         8d:f1:5e:cf:df:e2:52:66:97:61:36:59:81:26:25:19:99:c9:
+         93:e5:85:cb:ca:69:af:4b:21:a3:d2:7a:bf:b5:5e:2d:42:fb:
+         99:f8:22:58:e5:bf:79:b8:8a:74:7e:c6:94:14:d9:f2:27:63:
+         b6:e5:74:21:5b:59:fb:f6:c8:a9:28:fb:60:f7:5e:bd:c2:e6:
+         74:24:14:96:61:95:6c:c2:66:b4:52:25:a1:85:5a:97:e5:68:
+         5c:62:cf:69:3b:b0:a9:56:d8:e3:5f:74:dc:84:18:d5:3e:4f:
+         c9:35:39:26:88:dc:9b:80:d9:40:e1:4f:09:27:8d:d2:89:55:
+         30:91:02:86:35:04:95:1e:1d:58:14:5b:c6:e0:2e:a7:bf:a8:
+         f6:2b:76:8a:4e:71:79:bc:c0:04:cd:db:81:73:46:ce:68:ed:
+         25:b0:0e:42:8d:96:64:77:3b:f4:9d:1a:c9:f6:78:4c:56:4f:
+         92:17:29:3d:80:50:71:77:4b:a8:29:c2:12:fc:ad:0a:37:81:
+         38:4c:fb:54:99:4d:12:5f:98:dc:d1:a9:7b:08:45:c4:6f:7e:
+         fe:00:e0:db:79:fe:d1:28:e3:8e:82:d1:fb:bc:0a:c4:42:93:
+         c9:5e:eb:ba
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----

test/test_fallback.data/withdefault.certs/https-and-http.nginx-proxy.test.key

@@ -0,0 +1,27 @@
+-----BEGIN RSA PRIVATE KEY-----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+-----END RSA PRIVATE KEY-----

test/test_fallback.data/withdefault.certs/https-only.nginx-proxy.test.crt

@@ -0,0 +1,71 @@
+Certificate:
+    Data:
+        Version: 3 (0x2)
+        Serial Number: 4096 (0x1000)
+        Signature Algorithm: sha256WithRSAEncryption
+        Issuer: O=nginx-proxy test suite, CN=www.nginx-proxy.tld
+        Validity
+            Not Before: Feb  7 21:53:49 2023 GMT
+            Not After : Jun 25 21:53:49 2050 GMT
+        Subject: CN=https-only.nginx-proxy.test
+        Subject Public Key Info:
+            Public Key Algorithm: rsaEncryption
+                RSA Public-Key: (2048 bit)
+                Modulus:
+                    00:d9:87:48:02:85:f4:5f:0d:90:7e:4c:4f:13:89:
+                    41:ca:41:15:c2:6f:fd:a8:c7:17:83:c6:dd:8c:fe:
+                    19:a4:b2:6b:0b:35:4f:b4:3d:7c:40:0a:04:33:2a:
+                    fd:10:72:f7:63:63:99:5b:3d:ec:78:ee:c6:4d:c8:
+                    0e:4c:be:f2:3f:e3:02:74:57:9a:c1:fe:15:95:63:
+                    4e:e7:2c:eb:70:f2:6b:c8:ba:01:a2:ca:a1:c7:76:
+                    ff:38:e4:c2:b0:66:fc:85:d2:af:0f:22:81:d4:82:
+                    eb:d5:b0:e6:69:14:37:dd:8d:ad:29:ce:93:68:5a:
+                    ce:f4:77:76:6f:78:13:b6:c8:2f:fe:e0:b6:7e:fb:
+                    29:16:be:e2:f5:45:3b:39:5b:52:dc:26:b7:ca:0c:
+                    b6:1c:fc:a8:38:0b:dd:c1:f4:04:9b:2d:38:c9:a5:
+                    2d:3e:f1:42:88:53:a2:3b:17:cf:d5:3c:2b:d6:6a:
+                    7f:6f:05:8d:c5:b7:5d:64:1e:83:1b:e7:ec:80:3d:
+                    6d:34:c1:66:b2:e6:5d:d9:a7:6e:46:75:14:bf:10:
+                    16:c5:fc:47:8e:63:fa:e5:b4:bd:f2:b9:e0:cb:ea:
+                    75:f9:68:ee:7d:8f:ea:8f:1a:9f:34:27:7a:4a:9f:
+                    85:fd:3e:17:a7:96:c3:d0:4e:50:a2:a2:e0:45:92:
+                    d0:b5
+                Exponent: 65537 (0x10001)
+        X509v3 extensions:
+            X509v3 Subject Alternative Name: 
+                DNS:https-only.nginx-proxy.test
+    Signature Algorithm: sha256WithRSAEncryption
+         8a:52:46:42:a9:74:18:6a:52:90:ef:a4:e9:c5:54:d5:97:3a:
+         ff:8b:c2:76:4f:9e:47:aa:e1:ea:e5:b9:af:9d:33:e3:85:17:
+         54:7d:32:bd:ac:90:3f:5c:d2:a1:42:17:52:2b:b1:83:e5:c3:
+         bf:81:f0:e7:38:e2:88:67:7b:d8:59:fe:f9:94:99:ba:be:f4:
+         3c:24:b2:c7:9e:f0:98:21:c6:2d:c2:e8:f3:67:bd:62:00:aa:
+         ce:34:fa:b4:53:6d:c1:09:5e:55:bd:43:aa:86:c6:f8:c5:83:
+         46:3a:49:12:a2:ec:30:36:0c:99:44:74:09:9d:cc:4b:98:1f:
+         7e:c9:9b:68:a0:f8:1e:00:14:d0:da:2a:bf:c8:ca:a8:1c:10:
+         b5:68:a2:f1:41:93:0c:f3:3f:c0:c6:53:3c:8d:a7:dd:a5:7b:
+         35:cc:44:e0:5b:6d:c5:cb:33:6f:c1:43:7e:06:df:21:99:11:
+         b3:91:41:b4:5e:f0:37:1e:8e:e5:73:85:dc:4a:21:d5:41:f9:
+         4e:b8:f5:ed:21:93:09:91:c2:8c:6b:04:a4:84:ab:3a:fe:35:
+         64:fa:6b:a7:8d:40:a6:64:89:30:84:ac:28:99:5a:01:79:77:
+         c0:df:88:da:a9:75:5f:c4:51:ae:a8:45:7b:d2:e1:a2:81:29:
+         60:cd:7b:cd
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----

test/test_fallback.data/withdefault.certs/https-only.nginx-proxy.test.key

@@ -0,0 +1,27 @@
+-----BEGIN RSA PRIVATE KEY-----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+-----END RSA PRIVATE KEY-----

test/test_fallback.data/withdefault.yml

@@ -0,0 +1,36 @@
+services:
+  sut:
+    image: nginxproxy/nginx-proxy:test
+    volumes:
+      - /var/run/docker.sock:/tmp/docker.sock:ro
+      - ./withdefault.certs:/etc/nginx/certs:ro
+  https-and-http:
+    image: web
+    expose:
+      - "81"
+    environment:
+      WEB_PORTS: "81"
+      VIRTUAL_HOST: https-and-http.nginx-proxy.test
+  https-only:
+    image: web
+    expose:
+      - "82"
+    environment:
+      WEB_PORTS: "82"
+      VIRTUAL_HOST: https-only.nginx-proxy.test
+      HTTPS_METHOD: nohttp
+  http-only:
+    image: web
+    expose:
+      - "83"
+    environment:
+      WEB_PORTS: "83"
+      VIRTUAL_HOST: http-only.nginx-proxy.test
+      HTTPS_METHOD: nohttps
+  missing-cert:
+    image: web
+    expose:
+      - "84"
+    environment:
+      WEB_PORTS: "84"
+      VIRTUAL_HOST: missing-cert.nginx-proxy.test

test/test_fallback.py

@@ -0,0 +1,99 @@
+import os.path
+import re
+
+import backoff
+import pytest
+import requests
+
+
+@pytest.fixture
+def data_dir():
+    return f"{os.path.splitext(__file__)[0]}.data"
+
+
+@pytest.fixture
+def docker_compose_file(data_dir, compose_file):
+    return os.path.join(data_dir, compose_file)
+
+
+@pytest.fixture
+def get(docker_compose, nginxproxy, want_err_re):
+
+    @backoff.on_exception(
+        backoff.constant,
+        requests.exceptions.RequestException,
+        giveup=lambda e: want_err_re and want_err_re.search(str(e)),
+        interval=.3,
+        max_tries=30,
+        jitter=None)
+    def _get(url):
+        return nginxproxy.get(url, allow_redirects=False)
+
+    return _get
+
+
+INTERNAL_ERR_RE = re.compile("TLSV1_ALERT_INTERNAL_ERROR")
+CONNECTION_REFUSED_RE = re.compile("Connection refused")
+
+
+@pytest.mark.parametrize("compose_file,url,want_code,want_err_re", [
+    # Has default.crt.
+    ("withdefault.yml", "http://https-and-http.nginx-proxy.test/", 301, None),
+    ("withdefault.yml", "https://https-and-http.nginx-proxy.test/", 200, None),
+    ("withdefault.yml", "http://https-only.nginx-proxy.test/", 503, None),
+    ("withdefault.yml", "https://https-only.nginx-proxy.test/", 200, None),
+    ("withdefault.yml", "http://http-only.nginx-proxy.test/", 200, None),
+    ("withdefault.yml", "https://http-only.nginx-proxy.test/", 503, None),
+    ("withdefault.yml", "http://missing-cert.nginx-proxy.test/", 200, None),
+    ("withdefault.yml", "https://missing-cert.nginx-proxy.test/", 500, None),
+    ("withdefault.yml", "http://unknown.nginx-proxy.test/", 503, None),
+    ("withdefault.yml", "https://unknown.nginx-proxy.test/", 503, None),
+    # Same as withdefault.yml, except there is no default.crt.
+    ("nodefault.yml", "http://https-and-http.nginx-proxy.test/", 301, None),
+    ("nodefault.yml", "https://https-and-http.nginx-proxy.test/", 200, None),
+    ("nodefault.yml", "http://https-only.nginx-proxy.test/", 503, None),
+    ("nodefault.yml", "https://https-only.nginx-proxy.test/", 200, None),
+    ("nodefault.yml", "http://http-only.nginx-proxy.test/", 200, None),
+    ("nodefault.yml", "https://http-only.nginx-proxy.test/", None, INTERNAL_ERR_RE),
+    ("nodefault.yml", "http://missing-cert.nginx-proxy.test/", 200, None),
+    ("nodefault.yml", "https://missing-cert.nginx-proxy.test/", None, INTERNAL_ERR_RE),
+    ("nodefault.yml", "http://unknown.nginx-proxy.test/", 503, None),
+    ("nodefault.yml", "https://unknown.nginx-proxy.test/", None, INTERNAL_ERR_RE),
+    # HTTPS_METHOD=nohttp on nginx-proxy, HTTPS_METHOD unset on the app container.
+    ("nohttp.yml", "http://https-only.nginx-proxy.test/", None, CONNECTION_REFUSED_RE),
+    ("nohttp.yml", "https://https-only.nginx-proxy.test/", 200, None),
+    ("nohttp.yml", "http://unknown.nginx-proxy.test/", None, CONNECTION_REFUSED_RE),
+    ("nohttp.yml", "https://unknown.nginx-proxy.test/", 503, None),
+    # HTTPS_METHOD=redirect on nginx-proxy, HTTPS_METHOD=nohttp on the app container.
+    ("nohttp-on-app.yml", "http://https-only.nginx-proxy.test/", None, CONNECTION_REFUSED_RE),
+    ("nohttp-on-app.yml", "https://https-only.nginx-proxy.test/", 200, None),
+    ("nohttp-on-app.yml", "http://unknown.nginx-proxy.test/", None, CONNECTION_REFUSED_RE),
+    ("nohttp-on-app.yml", "https://unknown.nginx-proxy.test/", 503, None),
+    # Same as nohttp.yml, except there is a vhost with a missing cert.  This causes its
+    # HTTPS_METHOD=nohttp setting to effectively become HTTPS_METHOD=noredirect.  This means that
+    # there will be a plain http server solely to support that vhost, so http requests to other
+    # vhosts get a 503, not a connection refused error.
+    ("nohttp-with-missing-cert.yml", "http://https-only.nginx-proxy.test/", 503, None),
+    ("nohttp-with-missing-cert.yml", "https://https-only.nginx-proxy.test/", 200, None),
+    ("nohttp-with-missing-cert.yml", "http://missing-cert.nginx-proxy.test/", 200, None),
+    ("nohttp-with-missing-cert.yml", "https://missing-cert.nginx-proxy.test/", 500, None),
+    ("nohttp-with-missing-cert.yml", "http://unknown.nginx-proxy.test/", 503, None),
+    ("nohttp-with-missing-cert.yml", "https://unknown.nginx-proxy.test/", 503, None),
+    # HTTPS_METHOD=nohttps on nginx-proxy, HTTPS_METHOD unset on the app container.
+    ("nohttps.yml", "http://http-only.nginx-proxy.test/", 200, None),
+    ("nohttps.yml", "https://http-only.nginx-proxy.test/", None, CONNECTION_REFUSED_RE),
+    ("nohttps.yml", "http://unknown.nginx-proxy.test/", 503, None),
+    ("nohttps.yml", "https://unknown.nginx-proxy.test/", None, CONNECTION_REFUSED_RE),
+    # HTTPS_METHOD=redirect on nginx-proxy, HTTPS_METHOD=nohttps on the app container.
+    ("nohttps-on-app.yml", "http://http-only.nginx-proxy.test/", 200, None),
+    ("nohttps-on-app.yml", "https://http-only.nginx-proxy.test/", None, CONNECTION_REFUSED_RE),
+    ("nohttps-on-app.yml", "http://unknown.nginx-proxy.test/", 503, None),
+    ("nohttps-on-app.yml", "https://unknown.nginx-proxy.test/", None, CONNECTION_REFUSED_RE),
+])
+def test_fallback(get, url, want_code, want_err_re):
+    if want_err_re is None:
+        r = get(url)
+        assert r.status_code == want_code
+    else:
+        with pytest.raises(requests.exceptions.RequestException, match=want_err_re):
+            get(url)

test/test_keepalive.py

@@ -0,0 +1,31 @@
+import re
+
+
+def test_keepalive_disabled(docker_compose, nginxproxy):
+    r = nginxproxy.get("http://keepalive-disabled.nginx-proxy.test/headers")
+    assert r.status_code == 200
+    assert re.search(fr'(?m)^(?i:Connection): close$', r.text)
+
+def test_keepalive_disabled_other_headers_ok(docker_compose, nginxproxy):
+    """Make sure the other proxy_set_header headers are still set.
+
+    According to the nginx docs [1], any proxy_set_header directive in a block
+    disables inheritance of proxy_set_header directives in a parent block.  Make
+    sure that doesn't happen.
+
+    [1] https://nginx.org/en/docs/http/ngx_http_proxy_module.html#proxy_set_header
+    """
+    r = nginxproxy.get("http://keepalive-disabled.nginx-proxy.test/headers")
+    assert r.status_code == 200
+    assert re.search(fr'(?m)^(?i:X-Real-IP): ', r.text)
+
+def test_keepalive_enabled(docker_compose, nginxproxy):
+    r = nginxproxy.get("http://keepalive-enabled.nginx-proxy.test/headers")
+    assert r.status_code == 200
+    assert not re.search(fr'(?m)^(?i:Connection):', r.text)
+
+def test_keepalive_enabled_other_headers_ok(docker_compose, nginxproxy):
+    """See the docstring for the disabled case above."""
+    r = nginxproxy.get("http://keepalive-enabled.nginx-proxy.test/headers")
+    assert r.status_code == 200
+    assert re.search(fr'(?m)^(?i:X-Real-IP): ', r.text)

test/test_keepalive.yml

@@ -0,0 +1,25 @@
+keepalive-disabled:
+  image: web
+  expose:
+    - "80"
+  environment:
+    WEB_PORTS: 80
+    VIRTUAL_HOST: keepalive-disabled.nginx-proxy.test
+
+keepalive-enabled:
+  image: web
+  expose:
+    - "80"
+  environment:
+    WEB_PORTS: 80
+    VIRTUAL_HOST: keepalive-enabled.nginx-proxy.test
+  labels:
+    com.github.nginx-proxy.nginx-proxy.keepalive: "64"
+
+
+sut:
+  image: nginxproxy/nginx-proxy:test
+  volumes:
+    - /var/run/docker.sock:/tmp/docker.sock:ro
+  environment:
+    HTTPS_METHOD: nohttps

test/test_loadbalancing.py

@@ -0,0 +1,16 @@
+import pytest
+import re
+
+def test_loadbalance_hash(docker_compose, nginxproxy):
+    conf = nginxproxy.get_conf().decode('ASCII')
+    r1 = nginxproxy.get("http://loadbalance-enabled.nginx-proxy.tld")
+    r2 = nginxproxy.get("http://loadbalance-enabled.nginx-proxy.tld")
+    assert re.search(r"hash \$remote_addr\;", conf)
+    assert r1.status_code == 200
+    assert r2.text == r1.text
+
+def test_loadbalance_roundrobin(docker_compose, nginxproxy):
+    r1 = nginxproxy.get("http://loadbalance-disabled.nginx-proxy.tld")
+    r2 = nginxproxy.get("http://loadbalance-disabled.nginx-proxy.tld")
+    assert r1.status_code == 200
+    assert r2.text != r1.text

test/test_loadbalancing.yml

@@ -0,0 +1,27 @@
+services:
+  loadbalance-hash:
+    image: web
+    expose:
+      - "81"
+    environment:
+      WEB_PORTS: 81
+      VIRTUAL_HOST: loadbalance-enabled.nginx-proxy.tld
+    labels:
+      com.github.nginx-proxy.nginx-proxy.loadbalance: "hash $$remote_addr;"
+    deploy:
+      replicas: 2
+
+  loadbalance-roundrobin:
+    image: web
+    expose:
+      - "82"
+    environment:
+      WEB_PORTS: 82
+      VIRTUAL_HOST: loadbalance-disabled.nginx-proxy.tld
+    deploy:
+      replicas: 2
+
+  sut:
+    image: nginxproxy/nginx-proxy:test
+    volumes:
+      - /var/run/docker.sock:/tmp/docker.sock:ro

test/test_ssl/test_nohttp.py

@@ -1,9 +1,10 @@
 import pytest
+import requests
 
 
-def test_web2_http_is_not_forwarded(docker_compose, nginxproxy):
+def test_web2_http_is_connection_refused(docker_compose, nginxproxy):
-    r = nginxproxy.get("http://web2.nginx-proxy.tld/", allow_redirects=False)
+    with pytest.raises(requests.exceptions.RequestException, match="Connection refused"):
-    assert r.status_code == 503
+        nginxproxy.get("http://web2.nginx-proxy.tld/")
 
 
 def test_web2_https_is_forwarded(docker_compose, nginxproxy):

test/test_ssl/wildcard_cert_and_nohttps/test_wildcard_cert_nohttps.py

@@ -24,10 +24,10 @@ def test_https_get_served(docker_compose, nginxproxy, subdomain):
     assert f"answer from port 8{subdomain}\n" == r.text
 
 @pytest.mark.filterwarnings('ignore::urllib3.exceptions.InsecureRequestWarning')
-def test_web3_https_is_500_and_SSL_validation_fails(docker_compose, nginxproxy):
+def test_https_request_to_nohttps_vhost_goes_to_fallback_server(docker_compose, nginxproxy):
     with pytest.raises( (CertificateError, SSLError) ) as excinfo:
         nginxproxy.get("https://3.web.nginx-proxy.tld/port")
     assert """hostname '3.web.nginx-proxy.tld' doesn't match 'nginx-proxy.tld'""" in str(excinfo.value)
 
     r = nginxproxy.get("https://3.web.nginx-proxy.tld/port", verify=False)
-    assert r.status_code == 500
+    assert r.status_code == 503