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@guettli
guettli / ssh-tunnel@.service
Created December 22, 2017 11:40
Reliable persistent SSH-Tunnel via systemd (not autossh)
# Reliable persistent SSH-Tunnel via systemd (not autossh)
# https://gist.github.com/guettli/31242c61f00e365bbf5ed08d09cdc006#file-ssh-tunnel-service
[Unit]
Description=Tunnel for %i
After=network.target
[Service]
User=tunnel
ExecStart=/usr/bin/ssh -o "ExitOnForwardFailure yes" -o "ServerAliveInterval 60" -N tunnel@%i
@markjlorenz
markjlorenz / how-to.markdown
Last active March 24, 2022 06:42
Reverse Proxy Tunneling with an amazon EC2. Poor-mans gotomypc, teamviewer, etc.

Reverse Port Tunneling with EC2

Reverse port tunneling is used to give a user outside of a networks firewall accesst to a computer inside the firewall where direct SSH connections aren't allowed. It works by the in-firewall computer SSH'ing to a middleman computer that then forwards incomming SSH connections on a given port to the firewalled computer.

Setup the middleman

  • Get an ubuntu EC2 instance
  • Download it's security keys (both in-firewall and out-firewall computers will need the private key)
  • Setup the security group to allow connections on port 10002
  • SSH into the middleman and add: GatewayPorts yes to /etc/ssh/sshd_config