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forwarding port 22 safe?
(alien.top)
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this post was submitted on 28 Nov 2023
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Disable password auth.
Enable key only auth.
Add in TOTP 2FA (google authenticator).
Randomize the port (reduce bots) that forwards to 22.
Configure lockout to block upon 3 failed attempts, for a long duration like 1 year. (Have a backup access on LAN).
Ensure only the highest encryption ciphers are accepted.
Ensure upgrades are applied to sshd at least monthly.
If you are going all out, may as well add hosts.deny and hosts.allow.
Easy to do with known internal networks.
Difficult to manage when roaming.
Absolutely, just sometimes people forget those tools even exist. Of course, you can easily do the same thing with firewall rules as well.
Also, that was a great tidbit about the pam email notification on successful logon. I haven't seen that one before, thank you!!