Port triggering, Port triggering -6 – NETGEAR ProSafe FVS124G User Manual
Page 140
Reference Manual for the ProSafe VPN Firewall 25 with 4 Gigabit LAN and Dual WAN Ports
8-6
Router and Network Management
202-10085-01, March 2005
•
WAN Users—These settings determine which Internet locations are covered by the rule, based
on their IP address.
–
Any: The rule applies to all Internet IP address.
–
Single address: The rule applies to a single Internet IP address.
–
Address range: The rule is applied to a range of Internet IP addresses.
•
Destination Address—These settings determine the destination IP address for this rule which
will be applicable to incoming traffic, this rule will be applied only when the destination IP
address of the incoming packet matches the IP address of the WAN interface selected or
Specific IP address entered in this field.Selecting ANY enables the rule for any IP in
destination field.similarly WAN1 and WAN2 corresponds to respective wan interfaces.
•
Services—You can specify the desired Services or applications to be covered by this rule. If
the desired service or application does not appear in the list, you must define it using the
Services menu (see
).
•
Schedule—You can specify whether the rule is to be applied on the Schedule 1, Schedule 2, or
Schedule 3 time schedule (see
).
“Using Rules to Block or Allow Specific Kinds of Traffic” on page 6-1
for the procedure on
how to use this feature.
Port Triggering
Port triggering allows some applications to function correctly that would otherwise be partially
blocked by the firewall. Using this feature requires that you know the port numbers used by the
Application.
Once configured, operation is as follows:
•
A PC makes an outgoing connection using a port number defined in the Port Triggering table.
•
This Router records this connection, opens the additional INCOMING port or ports associated
with this entry in the Port Triggering table, and associates them with the PC.
•
The remote system receives the PCs request and responds using the different port numbers that
you have now opened.
•
This Router matches the response to the previous request and forwards the response to the PC.
Without Port Triggering, this response would be treated as a new connection request rather
than a response. As such, it would be handled in accordance with the Port Forwarding rules.
–
Only one PC can use a Port Triggering application at any time.