From 7a2079e3ef7fcd4dffbd44fbf77718004a7f77f1 Mon Sep 17 00:00:00 2001
From: Terekhin Alexandr <alex@bearns.me>
Date: Sat, 14 Dec 2024 23:34:27 +0300
Subject: [PATCH] Nginx frontend in stream mode, client cert based auth to
 connect sstp server

---
 accel-ppp.conf                    |  2 +-
 compose.yaml                      | 45 ++++++++++++++++++++++++++++---
 nginx-stream/Dockerfile           | 10 +++++++
 nginx-stream/nginx.conf           | 12 +++++++++
 nginx-stream/stream.conf.template | 37 +++++++++++++++++++++++++
 proxy/00-default.conf             |  7 +++++
 proxy/Dockerfile                  |  3 +++
 7 files changed, 111 insertions(+), 5 deletions(-)
 create mode 100644 nginx-stream/Dockerfile
 create mode 100644 nginx-stream/nginx.conf
 create mode 100644 nginx-stream/stream.conf.template
 create mode 100644 proxy/00-default.conf
 create mode 100644 proxy/Dockerfile

diff --git a/accel-ppp.conf b/accel-ppp.conf
index e13408b..c267073 100644
--- a/accel-ppp.conf
+++ b/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
diff --git a/compose.yaml b/compose.yaml
index e36f4dc..b489900 100644
--- a/compose.yaml
+++ b/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
\ No newline at end of file
+      - 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:
diff --git a/nginx-stream/Dockerfile b/nginx-stream/Dockerfile
new file mode 100644
index 0000000..3bed434
--- /dev/null
+++ b/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
\ No newline at end of file
diff --git a/nginx-stream/nginx.conf b/nginx-stream/nginx.conf
new file mode 100644
index 0000000..49c3662
--- /dev/null
+++ b/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;
diff --git a/nginx-stream/stream.conf.template b/nginx-stream/stream.conf.template
new file mode 100644
index 0000000..74f1ff6
--- /dev/null
+++ b/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;
+    }
+}
\ No newline at end of file
diff --git a/proxy/00-default.conf b/proxy/00-default.conf
new file mode 100644
index 0000000..76b721c
--- /dev/null
+++ b/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;
+}
\ No newline at end of file
diff --git a/proxy/Dockerfile b/proxy/Dockerfile
new file mode 100644
index 0000000..13747d3
--- /dev/null
+++ b/proxy/Dockerfile
@@ -0,0 +1,3 @@
+FROM nginx:alpine
+
+COPY 00-default.conf /etc/nginx/conf.d/
\ No newline at end of file