port forwarding with socat

hi , i needed some port forwarding with socat or anything to connect my vps2 to my vps1 and load user and pass from it . i use vps1 and vps2 for openssh vpn so my users can get free internet without any filtering , someone helped me and i managed to port forward my ssh and load the user data on my vps1 with making this service file :


Description=SSH Forwarding Service



ExecStart=/usr/bin/socat TCP-LISTEN:22,fork,reuseaddr


but i also have v2ray panel on my vps1 with 2 config , one of em on port 443 with TLS on and cer , key file on my vps1 , the other on port 13081 without TLS . so i made 2 more file like this :


Description=SSH Forwarding Service



ExecStart=/usr/bin/socat TCP-LISTEN:13081,fork,reuseaddr


both port 2255 and 13081 works fine but the port 443 that has TLS config doesnt work .

when i use this :

socat TCP-LISTEN:2255,fork|socat TCP-LISTEN:443,fork|socat TCP-LISTEN:13081,fork

all work fine even port 443 but the problem is when i close the SSH window it stops .

so how can i fix this port 443 problem ? i tried so many ways but none of em worked

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May 3, 2023
Accepted Answer

Heya @driftinglightcyanurchin,

I just answered the question you provided here and in Sorry for the delay!

Anyway, I’ll post it here just to be sure:

To make the socat command run as a background process even after closing the SSH window, you can use the nohup command combined with &. However, I recommend creating a systemd service for each port you want to forward, just like you did for port 22

  1. Create a new systemd service file at /etc/systemd/system/v2ray-443-forward.service with the following content:
Description=V2Ray Port 443 Forwarding Service

ExecStart=/usr/bin/socat TCP-LISTEN:443,fork,reuseaddr

  1. sudo systemctl daemon-reload
  2. sudo systemctl enable v2ray-443-forward.service
  3. sudo systemctl start v2ray-443-forward.service

Do the same for the other ports (e.g., 13081) if you haven’t already created a systemd service for them.

Now, when you close your SSH window, the socat processes will continue to run in the background, managed by systemd.

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