SSH Tunnel

SSH tunneling, port forwarding, and secure remote access. Covers local/remote/dynamic forwards, jump hosts, ProxyCommand, multiplexing, key management, and connection debugging.

When to Use

• Accessing a remote database through a firewall (local port forward)
• Exposing a local dev server to a remote machine (remote port forward)
• Using a remote server as a SOCKS proxy (dynamic forward)
• Connecting through bastion/jump hosts
• Managing SSH keys and agent forwarding
• Transferring files securely (scp, rsync)
• Debugging SSH connection failures

Port Forwarding

Local forward (access remote service locally)