Telnet Questions

[twayderzzz]

Hello All,

We have a Solaris 5.9 box that drops connections after a few minutes of inactivity, when connected via our VPN. After a few minutes the telnet connection drops, but the VPN stays up. Connections to Windows machines stay operational, its just remote connections (SQLPLUS, Telnet) to the Solaris machines that crap out after a few minutes of inactivity.

Any thoughts would be extremely helpful. Thanks in Advance

 

[daFranze]

have you ever "truss"ed the ftpd to find out about this?
How long is the inactivity time till you crap out? About 4 Minutes? This might be the tcp_keepalive_interval
-> ndd -get /dev/tcp tcp_keepalive_interval # returns timeout in miliseconds
-> set this with
# ndd -set /dev/tcp tcp_keepalive_interval 2xreturnvalue
to twice the size

Best Regards, Franz
--
Solaris System Manager from Munich, Germany
I used to work for Sun Microsystems Support (EMEA) for 5 years

 

[twayderzzz]

daFranze,

Thanks for the input. The tcp_keepalilve_interval is set to 7200000, which, if im not mistaken is 2 hours. Does that sound right??

Also, I'm not sure what you mean by 'truss' the ftpd. Could you elaborate??

Thanks for the help, and patience. I'm still getting my feet wet in the UNIX world.

 

[daFranze]

yes 7200000 is 2h (if I calculate correctly ;-))

truss is a utility to watch a process activity.

truss -p 1

would show you the activities of the init Process (id 1) see man truss, it is a very powerfull utility...

Another helpfull tool may be "snoop", which shows you the network activity, it may show you who initiates the disconnect...

Best Regards, Franz
--
Solaris System Manager from Munich, Germany
I used to work for Sun Microsystems Support (EMEA) for 5 years