User profile for user: mikeloiterman
mikeloiterman Author
User level: Level 1
77 points

Firewall Issues - ssh_dispatch_run_fatal errors during SSH

Just upgraded to Sequoia and noticed a lot of issues with the firewall while using ssh.


After ssh'ing into a local server on my network, after a few minutes I get this error:


Bad packet length 2489765067.

ssh_dispatch_run_fatal: Connection to 192.168.30.2 port 22: Connection corrupted


I can trigger it by ssh'ing into pretty much any server or computer on my network and then executing a command like:


ping google.com


within 10 - 30 seconds, the connection drops.


Happens with IPv4 and IPv6. Happens with Terminal and iTerm apps.


Disabling the firewall fixes the issue. In this case, my Mac is running statically in my local network and safely behind an upstream firewall. So, it's annoying to have to disable the firewall every time I have to ssh in anywhere, but not the end of the world. Obviously, that isn't a long term fix, however.


Anyone else seeing similar?

Mac Studio

Posted on Sep 17, 2024 6:35 PM

Reply
Question marked as Top-ranking reply
User profile for user: trusk
trusk
User level: Level 1
15 points

Posted on Sep 21, 2024 10:19 PM

I spent 2 days debugging my Debian server until I realised this might be a problem on the client side. then I looked over the logs and 


2024-09-22T07:53:26.484700+03:00 TheBrain sshd[285596]: Received disconnect from 192.168.0.180 port 56574:11: disconnected by user
2024-09-22T07:53:26.484948+03:00 TheBrain sshd[285596]: Disconnected from user user 192.168.0.180 port 56574
2024-09-22T07:53:26.485790+03:00 TheBrain sshd[285590]: pam_unix(sshd:session): session closed for user user
2024-09-22T07:53:26.491402+03:00 TheBrain systemd-logind[468]: Session 309 logged out. Waiting for processes to exit.
2024-09-22T07:53:26.493102+03:00 TheBrain systemd-logind[468]: Removed session 309.
2024-09-22T07:53:59.923525+03:00 TheBrain sshd[285605]: Connection closed by 192.168.0.180 port 56575
2024-09-22T07:53:59.923785+03:00 TheBrain sshd[285605]: Close session: user user from 192.168.0.180 port 56575 id 0


so it's on the client side. And I solved this by disabling LuLu.

View in context
78 replies

This thread has been closed by the system or the community team. You may vote for any posts you find helpful, or search the Community for additional answers.

Firewall Issues - ssh_dispatch_run_fatal errors during SSH

Welcome to Apple Support Community
A forum where Apple customers help each other with their products. Get started with your Apple Account.
Learn more Sign up