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Unix Telnet/Login Problem

Ireno Yonwuren
Occasional Visitor

Unix Telnet/Login Problem

Are there any Unix User limitation of 50 (for any user) for the number of concurrent logins it can have or if there is a similar type of limitation on Telnet sessions.
6 REPLIES
James R. Ferguson
Acclaimed Contributor

Re: Unix Telnet/Login Problem

Hi:

The kernel parameter 'nstrtel' specifies the number of telnet device files that the kernel can support for incoming telnet sessions. Take a look too at 'npty'. The default values with 11.x are usually 60. See here for more information:

http://docs.hp.com/hpux/onlinedocs/os/KCparams.OverviewAll.html

Regards!

...JRF...
John Payne_2
Honored Contributor

Re: Unix Telnet/Login Problem

If you are talking HP-UX, it could be the kernel param 'npty' See if that value is 50. If so, raise it, reboot and see what happens.
Spoon!!!!
Roger Baptiste
Honored Contributor

Re: Unix Telnet/Login Problem

<>

There is a limit for the
"total' number of logins
at any time on a system. It
doesn''t matter how many times
a user logins within
the system limit.

The kernel parameters which
are related to these
limits are:
npty
and if you using hpux11.00
nstrtel

You can increase this
parameters through SAM, reboot
the box to bring it to effect.

-raj


Take it easy.
Sanjay_6
Honored Contributor

Re: Unix Telnet/Login Problem

Patrick Wallek
Honored Contributor

Re: Unix Telnet/Login Problem

Rita C Workman
Honored Contributor

Re: Unix Telnet/Login Problem

I believe a user can login as many times as they wish..depending if there are enough resources to handle it. If they are doing a telnet, then you would have to ensure that your npty/nstrtel/nstrpty parms are set high enough to support all the connections.
=========
NOW....someone may have set something up in either the system profile (/etc/profile) or in a users profile to restrict the number of concurrent sessions...SO, you may want to check there.

Hope this helps,
Rita