User access limitation trough telnet

[Alexander Santamaria Ji]

I have an HP9000 D370 with HPUX 10.20, this
server runs applications in Informix and also has a sendmail service running.

At this time we have a problem because the system limits the user access to 56.

This message appears frequently in the syslog

telnetd[7105]: Cannot allocate pty

Please give some recommendation to solve this problem

[baiju_3]

Hoping your system is 11.X

You need to increase the value of npty and rebuild the kernel . You can use sam to do the changes.

to see the current npty setting use

kmtune |grep npty

Thanks,
BL.

[Alexander Santamaria Ji]

Hi lalb

We have HPUX 10.20 and did the kernel changes
but the problem continues.

Do you know some HPUX PATCH that maybe will
solve some HPUX 10.20 sam bug related with this problem?


Alexander

[baiju_3]

Please refer below links

http://docs.hp.com/en/939/KCParms/KCparam.Npty.html
http://docs.hp.com/en/939/KCParms/KCparam.NstrPty.html

Also do

cd /dev

insf -e


Please post the below command o/p


sysdef |grep npty

Thanks,
BL.

[Devender Khatana]

Hi,

As per the message the device files are not allocated for telnet sessions. You need to check three kernel parameters to check for this.

npty,nstrpty & nsrtel.

HTH,
Devender

[Bill Hassell]

You must increase 3 parameters in 10.20 (and 11.00 and 11.11):

npty
nstrtel
nstrpty

Now, if you do not use SAM to make the changes, you must also run insf to install the device files for the new limits. SAM does this automatically.

[Alexander Santamaria Ji]

Thanks for all, we solved the problem.

The SAM didn´t create the device files and we had to create them manually using the "insf" command and indicating how many
additional device files.

Best Regards,

Alexander

[Alexander Santamaria Ji]

Thanks for all, we solved the problem.

The SAM didn´t create the device files and we had to create them manually using the "insf" command and indicating how many
additional device files.

Best Regards,

Alexander