SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/aplus-ssh-port

Which TCP port does Secure Shell (SSH) use by default?

Port 22 is the registered port for SSH.

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  1. 22 ✔
  2. 23
  3. 3389

Why: SSH is registered to port 22. Telnet sits on 23 and Remote Desktop on 3389. All three are remote access tools, so techs mix them up.

Huh, didn't know that: The IANA registry lists SSH on port 22 for TCP, UDP and SCTP.

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What did the parrot say when it wanted to get inside its owner's computer? 'Polly wants a hacker!'
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References

Answer: 22. SSH is registered to port 22. Telnet sits on 23 and Remote Desktop on 3389. All three are remote access tools, so techs mix them up.

  1. IANA Service Name and Transport Protocol Port Number Registry CSV www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.csv
    ssh,22,tcp,The Secure Shell (SSH) Protocol
    Checked 2026-10-11.
  2. IANA Service Name and Transport Protocol Port Number Registry CSV www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.csv
    ssh,22,udp,The Secure Shell (SSH) Protocol
    Checked 2026-10-11.
  3. IANA Service Name and Transport Protocol Port Number Registry CSV www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.csv
    ssh,22,sctp,SSH
    Checked 2026-10-11.

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