Sitecom WL-350 - Firewall

 Time Out: The number of seconds of idle time until the router considers the
session terminated. The initial value of Time Out depends on the type and
state of the connection.
o 300 seconds - UDP connections.
o 240 seconds - Reset or closed TCP connections. The connection does
not close instantly so that lingering packets can pass or the connection
can be re-established.
o 7800 seconds - Established or closing TCP connections.
Firewall
Click on the Firewall link in the navigation menu. This page displays the details
about firewall holes in your router.