topic SSH login is extremely slow in Operating System - HP-UX

SSH login is extremely slow

TalH — Wed, 28 Mar 2012 13:55:07 GMT

Hi,

I have HPUX 11.31 on IA64 that during login with SSH only (with any user, simple or root, local or NIS) after I type the password and press enter it takes more than 2 minutes to get command prompt.

With telnet I get the command prompt immediately.

The load on the system is 99% idle, and I checked and it's not DNS lookup issue or /etc/nsswitch.conf problem.

Any idea how to fix it?

Thanks,

Tal

Re: SSH login is extremely slow

Steven Schweda — Wed, 28 Mar 2012 14:28:21 GMT

Re: SSH login is extremely slow

TalH — Wed, 28 Mar 2012 15:06:22 GMT

I run the ssh -vv few times and the delay (about 140 seconds) was between the 2 last lines:
debug2: channel 0: open confirm rwindow 0 rmax 32768
debug2: channel 0: rcvd adjust 131072

Re: SSH login is extremely slow

Sachin Rajput — Wed, 28 Mar 2012 16:16:36 GMT

check your wtmp and btmp files size .

truncate them and then check if it helps .

Sachin Rajput
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Re: SSH login is extremely slow

Dennis Handly — Wed, 28 Mar 2012 18:54:06 GMT

Instead of creating a new topic, please continue your previous one:

http://h30499.www3.hp.com/t5/System-Administration/HPUX-slow-login/m-p/5601045/

Re: SSH login is extremely slow

TalH — Thu, 29 Mar 2012 08:24:41 GMT

Thanks!

Re: SSH login is extremely slow

Sachin Rajput — Thu, 29 Mar 2012 08:55:57 GMT

Do you want to know why this causes the slowness .

.. while ssh login after you enter the password .

It fetches your last successfull login details from wtmp and if the size of the file is very big it will take more time to analyse the file and fetch the details .

Hence the slowness in connection ..

Do not forget to assign the kudoes ... :-)