ssh timeout on text output

llin · 01-22-2012, 08:07 PM

Hi All,

Bizarre issues with a couple of Slackware (12.1) servers after a power outage. They function normally when I connect from a Windows machine via putty but in a ssh connection (A to B or B to A) commands that produce a large amount of text output like dmesg or less will hang then disconnect with "Timeout, server not responding".

eeekster · 01-22-2012, 08:24 PM

Are you saying these commands with lots of output work find with putty as the client?

llin · 01-22-2012, 09:04 PM

Correct, no issues during a putty session.

eeekster · 01-23-2012, 02:12 AM

Okay, what settings are there in putty that are different in openssh?

llin · 01-25-2012, 08:34 AM

None AFAIK, both ssh_config and putty are using their out-of-the-box defaults.

eeekster · 01-25-2012, 03:33 PM

Quote:

Originally Posted by llin

None AFAIK, both ssh_config and putty are using their out-of-the-box defaults.

Those defaults are not likely to be the same. Take a look at /etc/ssh/sshd_config and at putty's setup. You might find some differences.

I also like adding these two lines to /etc/ssh/sshd_config to prevent NATs from dropping out:

ClientAliveInterval 37
ClientAliveCountMax 8