SSh session hang

Hello,

When I connect to a HP-UX 11.23 and/or 11.31 after a time without activity, the session hang.

There is not TMOUT stablished, and the session NOT finish, always keep hang after about 20min of inactivity period.

Anyone knows if this problem is related to HP-UX or network infraestructure (firewalls)?.

Thanks.

could be a firewall. turn on keep alive if your client supports it. another thing you can try is running a command like vmstat 1 or top. if running those commands allows your session to stay open your probably hitting a firewall timeout.