add Tor-to-IP tunnel service for HTTP

2025-12-18 12:34:20 +01:00 · 2021-03-08 11:50:39 +00:00
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+# Tor-to-IP tunnel service for HTTP
+
+Use the public IP address of a Virtual Private Server (VPS) to make Tor Hidden Services reachable on the clearnet.
+
+## Advantages: 
+* hides the IP of the host from the public and from the VPS
+* no port forwarding needed on the LAN of the host
+* additional encryption by Tor between the host and the VPS 
+
+## Requirements:
+* SSH access to a Virtual Private Server (VPS) - eg. a minimal package on Lunanode for ~3.5$/month
+    * Example Lightning Payable VPS services:
+        * [host4coins.net](https://host4coins.net)
+        * [bitclouds.sh](https://bitclouds.sh/) or [lntxbot](https://t.me/lntxbot) `/bitclouds` 
+* Note that only the root user can forward to ports below 1000.  
+* Tor should not be the only encryption layer of the service as the traffic exposed on the VPS is meant to be for the `localhost`
+* Always check the terms and rules of the VPS provider to avoid bans and don't do anything causing them trouble to keep these services going.
+
+## On the VPS
+
+* Login with ssh to the `root` user  
+    `ssh root@VPS_IP_ADDRESS`
+* Install `tor` (leave on default settings) and `socat`  
+`# apt install tor socat`
+
+### Set up a systemd service
+
+* make a separate process for every connected Hidden Service to avoid restarting every connection when a service added or removed.  
+Suggestion for naming the service is to put the VPS_PORT used on the VPS into the name: `tor2ip<VPS_PORT>`
+
+* create the service file:   
+`# nano /etc/systemd/system/tor2ip80.service`
+    * Paste the following and fill in:
+        * the `VPS_PORT` you want to use (facing the public) - in this example: 80.
+        * the `TOR_HIDDEN_SERVICE_ADDRESS.onion`
+            * generate the address with:
+                * `config.scripts/internet.hidden.service.sh HTTPS 80 80`
+                * this will expose the local port `80` on the `.onion:80`
+        * The `TOR_PORT` the Hidden Service is using - in this example: 80
+
+    ```
+    [Unit]
+    Description=Tor2IP Tunnel Service
+    After=network.target
+
+    [Service]
+    User=root
+    Group=root
+    ExecStart=/usr/bin/socat TCP4-LISTEN:80,bind=0.0.0.0,fork SOCKS4A:localhost:TOR_HIDDEN_SERVICE_ADDRESS.onion:80,socksport=9050
+    StandardOutput=journal
+
+    [Install]
+    WantedBy=multi-user.target
+    ```
+* Enable and start the service:  
+`# systemctl enable tor2ip80`  
+`# systemctl start tor2ip80`
+
+Setting up this Tor-to-IP tunnel service is now complete. You can carry on adding other services using different ports on the VPS.  
+You should be able access the ports/services of the host computer through: VPS_IP_ADDRESS:VPS_PORT.
+To connect to the HTTP website served from the node in the example:  
+ `http://VPS_IP_ADDRESS`
+  
+## Monitoring on the VPS
+
+* To check if tunnel is active on the VPS:  
+`# netstat -tulpn`
+
+    * Look for the lines:
+    ```
+    Active Internet connections (only servers)
+    Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name    
+
+    tcp        0      0 0.0.0.0:80            0.0.0.0:*               LISTEN      13684/socat  
+    ```
+
+* Monitor the service with:  
+`# systemctl status tor2ip80`
+```
+● tor2ip80.service - Tor2IP Tunnel Service
+   Loaded: loaded (/etc/systemd/system/tor2ip80.service; enabled; vendor preset: enabled)
+   Active: active (running) since Sun 2020-04-05 14:58:43 BST; 2min 23s ago
+ Main PID: 13684 (socat)
+    Tasks: 1 (limit: 1078)
+   Memory: 540.0K
+   CGroup: /system.slice/tor2ip80.service
+           └─13684 /usr/bin/socat TCP4-LISTEN:80,bind=0.0.0.0,fork SOCKS4A:localhost:TOR_HIDDEN_SERVICE_ADDRESS.onion:80,socksport=9050
+
+Apr 05 14:58:43 VPS_hostname systemd[1]: Started Tor2IP Tunnel Service.
+```
+
+## Resources
+
+* `socat` manpage:  <https://linux.die.net/man/1/socat>
+* Thanks to [@emzy](https://twitter.com/emzy) for the original `socat` syntax.  
+* Produced at the [#LightningHackSprint](https://wiki.fulmo.org/index.php?title=Lightning_HackSprint).