refuses connections after 20 minutes -- HELP!!

[smikes19]

hi,
I have a sun blade 1000 (brand new). It was working perfectly initially, but for some reason now, after 20 minutes, it will stop accepting any connections (rlogin,telnet...etc). From the box itself, whats funny is that I can only ping certain machines. After a reboot, everything is back to normal for another 20 mins or so. Anyone have any clues!??!?!?!

 

[Guest_imported]

Do you have a console window open while this is going on? Also try checking your /var/adm/messages log.

 

[bluedevils]

check your netmask