Home / server / Questions / 265411
In Process
user61104
Asked: 2011-05-03 02:06:15 +0800 CST

ssh connection keep disconected , how to find way? in CentOs vmware

  • 772

i have CentOS installed on vmware , few days ago every thing was working fine. today every time im connect with putty to the CentOs server after few minutes it disconnect me , how can i find what is the reason ?

when i check /var/log/secure im getting :

Jan 23 18:01:09 localhost sshd[17461]: Exiting on signal 15 when i check the "/var/log/messages" there is nothing that says something about this signal my iptables is closed

linux-networking

2 Answers

  1. Add the following line to the /etc/ssh/ssh_config file:

    ServerAliveInterval 60

    The number is the amount of seconds before the server with send the no-op code.

    • 2

  2. A signal 15 in the log indicates something more serious then just a timeout issue.

    I would run strace -p PID for the sshd process and see why it's actually dieing.

    You should also try ssh from the server to localhost and see if that's stable. For example: ssh root@0

    Definitely you should install any available CentOS upgrades as well. If the problems persist, then try reinstall the SSH server package in case it's been compromised or corrupted somehow.

    • 0