Port 22 — SSH / SFTP

Q: What's Port 22 for?

Administration Life. The protocol or service generally associated with this is SSH / SSH / SSH.

Q: Transport ProtocolTCPSafety precautionsOnly show if necessary, filter source IPs and prefer SSH keys.Should we open this port in the Burt?

Only if a service is actually needed l, use it. Apply the principle of any privilege: limit the authorized sources, destinations and interfaces, and then log connections when relevant.

Q: How do I check this port?

Test-NetConnection SERVER -Port 22Under Linux, you can use nc -vz SERVER 22.

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Port22

TransportTCP

ServiceSSH / SFTP

Port 22TCP

Secured Service and Transfer System (SSH).

What’s Port 22 for?

Remote administration. The protocol or service generally associated with this is SSH / SSH / SSH.

Transport Protocol

TCP

Safety precautions

Only show if necessary, filter source IPs and prefer SSH keys.

Should we open this port in the firewall?

Only if a service is actually needed the use it. Apply the principle of any privilege: limit the authorized sources, destinations and interfaces, and then log connections when relevant.

How do I check this port?

Test-NetConnection SERVER -Port 22

Under Linux, you can use nc -vz SERVER 22.

Port/service associations are common conventions. An application can be configured on another port.