Unix Telnet/Login Problem

[Ireno Yonwuren]

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.

[James R. Ferguson]

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]

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.

[Roger Baptiste]

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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

[Sanjay_6]

Hi Ireno,

This is the parameter JRF is referring to,

http://docs.hp.com/hpux/onlinedocs/os/KCparam.NstrTel.html

You may also look into these parameters,

http://docs.hp.com/hpux/onlinedocs/os/KCparam.MaxUprc.html

http://docs.hp.com/hpux/onlinedocs/os/KCparam.MaxUsers.html

Hope this helps.

Regds

[Patrick Wallek]

There are three parameters that affect the # of telnet logins on an 11.0 system:

npty
nstrpty
nstrtel

http://docs.hp.com/hpux/onlinedocs/os/KCparam.NstrPty.html

http://docs.hp.com/hpux/onlinedocs/os/KCparam.Npty.html

http://docs.hp.com/hpux/onlinedocs/os/KCparam.NstrTel.html

[Rita C Workman]

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