Nginx frontend in stream mode, client cert based auth to connect sstp server

accel-ppp.conf

@@ -41,7 +41,7 @@ lcp-echo-timeout=5
 [sstp]
 port=443
 verbose=5
-#accept=proxy,ssl
+accept=proxy,ssl
 accept=ssl
 ssl-pemfile=/etc/cert.pem
 ssl-keyfile=/etc/privkey.pem

compose.yaml

@@ -11,10 +11,47 @@ services:
       - ./ca.pem:/etc/ca.pem:ro
     expose:
       - "443/tcp"
-    ports:
-      - "443:443/tcp"
     devices:
       - "/dev/ppp:/dev/ppp:rwm"
-
+    environment:
+      VIRTUAL_HOST: "api.bearns.me"
+      VIRTUAL_PROTO: "https"
+      VIRTUAL_PORT: 443
     cap_add:
-      - NET_ADMIN
+      - NET_ADMIN
+    networks:
+      - proxy-tier
+
+  stream:
+    build: ./nginx-stream
+    volumes:
+      - ./ca.pem:/etc/nginx/certs/ca.pem:ro
+      - ./cert.pem:/etc/nginx/certs/cert.pem:ro
+      - ./privkey.pem:/etc/nginx/certs/privkey.pem:ro
+    expose:
+      - "443/tcp"
+    ports:
+      - "443:443/tcp"
+    environment:
+      - ENABLE_IPV6=true
+      - TRUST_DOWNSTREAM_PROXY=true
+    networks:
+      - proxy-tier
+
+  proxy:
+    build: ./proxy
+    volumes:
+      - ./cert.pem:/etc/nginx/certs/cert.pem:ro
+      - ./privkey.pem:/etc/nginx/certs/privkey.pem:ro
+    expose:
+      - "443/tcp"
+    networks:
+      - proxy-tier
+
+networks:
+  proxy-tier:
+
+volumes:
+  certs:
+  vhost.d:
+  html:

nginx-stream/Dockerfile

@@ -0,0 +1,10 @@
+FROM nginx:alpine
+
+ENV HTTPS_UPSTREAM="proxy"
+ENV SSTP_UPSTREAM="sstp"
+ENV CA_CERT="ca.pem"
+
+COPY nginx.conf /etc/nginx/
+COPY stream.conf.template /etc/nginx/templates/
+
+RUN rm -f /etc/nginx/conf.d/default.conf

nginx-stream/nginx.conf

@@ -0,0 +1,12 @@
+user  nginx;
+worker_processes  auto;
+
+error_log  /var/log/nginx/error.log notice;
+pid        /var/run/nginx.pid;
+
+
+events {
+    worker_connections  1024;
+}
+
+include /etc/nginx/conf.d/*.conf;

nginx-stream/stream.conf.template

@@ -0,0 +1,37 @@
+error_log /dev/stderr;
+
+stream {
+    map $ssl_client_verify $name {
+        SUCCESS sstp;
+        default https;
+    }
+
+    upstream https {
+        server ${HTTPS_UPSTREAM}:443;
+    }
+
+    upstream sstp {
+        server ${SSTP_UPSTREAM}:443;
+    }
+
+    server {
+        listen 443 ssl;
+        listen [::]:443 ssl;
+
+        ssl_certificate /etc/nginx/certs/cert.pem;
+        ssl_certificate_key /etc/nginx/certs/privkey.pem;
+
+        ssl_trusted_certificate /etc/nginx/certs/${CA_CERT};
+        ssl_verify_client optional;
+
+        proxy_half_close on;
+
+        # Doesn't work without it
+        proxy_ssl on;
+        proxy_ssl_session_reuse off;
+
+        proxy_pass $name;
+        ssl_preread on;
+        proxy_protocol on;
+    }
+}

proxy/00-default.conf

@@ -0,0 +1,7 @@
+server {
+    listen 443 ssl;
+    server_name _;
+    ssl_certificate /etc/nginx/certs/cert.pem;
+    ssl_certificate_key /etc/nginx/certs/privkey.pem;
+    return       404;
+}

proxy/Dockerfile

@@ -0,0 +1,3 @@
+FROM nginx:alpine
+
+COPY 00-default.conf /etc/nginx/conf.d/