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refused telnet connections

 
Ullrich Rieger
Occasional Contributor

refused telnet connections

When I try to setup a telnet session with my HP-Server I get the message
telnetd: Telnet device drivers missing: No such device

According to the kernel parameters the number of sessions should be 60, but I get only 24 telnetd processes using ps. Looking at the device files in /dev/pts shows, that 37 of them are owned root and 23 are owned by actual users with group ID tty.

23 or 24 sessions seems to be realistic. How can I get more without rebooting?


3 REPLIES 3
Tony Constantine_1
Regular Advisor

Re: refused telnet connections

I would try rebuilding the kernel and doing a reboot
MARTINACHE
Respected Contributor

Re: refused telnet connections

Look at the npty, nstrpty and nstrtel kernel parameters value.

nstrtel = max number of telnet sessions

Warning : modification means reboot ...

Patrice.
Patrice MARTINACHE
James R. Ferguson
Acclaimed Contributor

Re: refused telnet connections

Hi:

The kernel parameter 'nstrtel' specifies the number of telnet device files that the kernel can support for incoming telnet sessions. This number should match the number of device files that exist on the system. You may need to adjust this, in addition to the 'nstrpty' and 'npty' parameters.

...JRF...