topic Re: openssh connection drop in Operating System - Linux

openssh connection drop

Ragni Singh — Thu, 05 Feb 2009 20:00:41 GMT

Hello,

my ssh connection is broken after 1-hour of idling on the terminal. Can you please help, points will be assigned.

Its a Linux server using..

Red Hat Enterprise Linux AS release 4 (Nahant Update 7)

OpenSSH_3.9p1, OpenSSL 0.9.7a Feb 19 2003

I have made the following change to sshd_config but that doesn't seem to help.

ClientAliveInterval 30
ClientAliveCountMax 5

Re: openssh connection drop

Steven E. Protter — Thu, 05 Feb 2009 21:54:43 GMT

Shalom,

Systems administration 101.

When you change something and suddenly something is broken, you back out your change. It may not be obvious, but your change triggered the problem.

SEP

Re: openssh connection drop

Ragni Singh — Thu, 05 Feb 2009 22:09:47 GMT

We'll I have went back and commented those 2 lines back. No other changes were made.

Re: openssh connection drop

Alan_152 — Fri, 06 Feb 2009 16:11:42 GMT

Try this:

ClientAliveInterval 216500
ClientAliveCountMax 0

Be sure to HUP the sshd daemon after making the change.

(Courtesy of http://support.citrix.com/article/CTX108882)

Re: openssh connection drop

Ragni Singh — Fri, 06 Feb 2009 17:11:55 GMT

Hi Alan,

what does that client interval time get set to?

Re: openssh connection drop

Alan_152 — Fri, 06 Feb 2009 17:18:40 GMT

That's roughly 60 hours. My lab has it set that high to run automated scripts.

Re: openssh connection drop

Ragni Singh — Fri, 06 Feb 2009 17:19:22 GMT

Thanks Alan, so this basically means that the connection will stay up for 60 hours?

Re: openssh connection drop

Ragni Singh — Fri, 06 Feb 2009 18:20:32 GMT

I'm sorry Alan but I tried it and it still dropped me after 1 hour.

Re: openssh connection drop

Vitaly Karasik_1 — Sun, 08 Feb 2009 09:03:42 GMT

Do you have firewall[s] between your ssh client and sertver? If so, FW may have idle timeouts too.

Re: openssh connection drop

Wilfred Chau_1 — Mon, 23 Feb 2009 18:57:08 GMT

Is there a firewall between the client and the server? There may be a timeout set on the firewall that will terminate idle ssh session.