Netopia Firmware 4000-Series - Manual (Page 55)

WAN and System Configuration 2-37
Stateful Inspection firewall
Stateful inspection firewall is a security feature that prevents unsolicited inbound access when NAT is disabled.
You can configure UDP and TCP “no-activity” periods that will also apply to NAT time-outs if stateful inspection is
enabled on the inter face. Stateful Inspection parameters are active on a WAN inter face only if enabled on your
Gateway. Stateful inspection can be enabled on a profile whether NAT is enabled or not.
■ UDP no-activity time-out: The time in seconds after which a UDP session will be terminated, if there is no
traffic on the session.
■ TCP no-activity time-out: The time in seconds after which an TCP session will be terminated, if there is no
traffic on the session.
■ Exposed Addresses: The hosts specified in Exposed addresses will be allowed to receive inbound traffic
even if there is no corresponding outbound traffic. This is active only if NAT is disabled on an WAN
inter face.
Stateful Inspection
UDP no-activity timeout (sec): 180
TCP no-activity timeout (sec): 14400
Add Exposed Address List...
Exposed Address Associations...
Return/Enter goes to new screen.
Return/Enter to configure Xposed IP addresses.