Port Triggering; Vpn Tunnels - NETGEAR ProSafe FVS338 Reference Manual

FVS338 ProSafe VPN Firewall 50 Reference Manual
• 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
See "Using Rules to Block or Allow Specific Kinds of Traffic" on page 4-1
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.
– After a PC has finished using a Port Triggering application, there is a time-out period
before the application can be used by another PC. This is required because the firewall
cannot be sure when the application has terminated.
See "Setting Up Port Triggering" on page 4-24

VPN Tunnels

The VPN firewall permits up to 200 VPN tunnels at a time. Each tunnel requires extensive
processing for encryption and authentication.
See Chapter 5, "Virtual Private
6-6
"Adding Customized Services" on page
"Setting a Schedule to Block or Allow Traffic" on page
Networking" for the procedure on how to use this feature.
v1.0, September 2006
4-17).
for the procedure on how to use this feature.
Router and Network Management
4-20).
for the procedure on