Why Moving SSH Off Port 22 Is Not Enough to Secure Your Server

A technical analysis challenges the widespread belief that changing SSH from its default port 22 meaningfully improves security. Port 22, assigned by IANA in 1995 at SSH creator Tatu Ylönen's request, only determines where the TCP handshake occurs and has no bearing on encryption strength or authentication. While shifting to a non-standard port can reduce automated scan noise and simplify log analysis, a determined attacker using a port scan will locate SSH regardless of where it listens. True SSH security depends on factors such as cryptographic algorithm selection, authentication methods enforced via sshd_config, forwarding rules, and connection rate limiting. Experts stress that a server on any port with weak ciphers and password authentication enabled is far more vulnerable than one on port 22 with strict algorithm controls and certificate-based authentication.