Connection lost

I have this problem, everytime I connect to my Solaris 8 server and am idle like few minutes, my connection gets dropped, is there any params I should be going after to increase to eliminate the disconnection (connection made thru telnet)thx.
[263 byte] By [danzak1] at [2007-11-25 23:18:57]
# 1
check the TIMEOUT value in /etc/default/login.In case of secure shell, check the sshd_config file.
dwlahiri at 2007-7-5 18:07:12 > top of Java-index,General,Talk to the Sysop...
# 2
/etc/default/login is fine, timeout is commented out, I begining to think it's a firewall/router thingy.Anyone has this problem before.
danzak1 at 2007-7-5 18:07:12 > top of Java-index,General,Talk to the Sysop...
# 3
Might be a firewall then. Do you have to authenticate through a firewall before you get to your system ? If so, that's probably it.
swoneill at 2007-7-5 18:07:12 > top of Java-index,General,Talk to the Sysop...