ssh -f -N -T

ssh -f -N -T -R22222:localhost:22 yourpublichost.example.com

Related

• ssh -R
• Reverse SSH tunneling

See also

• SSH: ssh, TLS, .ppk, .pem, .crt, .pub, ED25519, Key exchange method (KEX), public key, private key, ssh -Q kex, IAMUserSSHKeys, known_hosts, ssh tunnel, Dropbear