ProSafe VPN Firewall 200 FVX538 Reference Manual
4-28 Firewall Protection and Content Filtering
v1.0, August 2006
3. Build your list of Source MAC Addresses to be block by entering the first MAC address in the
MAC Address field in the form xx:xx:xx:xx:xx:xx where x is a numeric (0 to 9) or an
alphabet between and a and f (inclusive), for example: 00:e0:4c:69:0a:
4. Click Add. The Mac Address will be added to the Available MAC Addresses to be Blocked
table. (You can edit the MAC address by clicking Edit in the Action column adjacent to the
MAC Address.)
5. Click Reset to cancel a MAC address entry before adding it to the table.
6. Click Apply to save your settings.
To remove an entry from the table, select the MAC address entry and click Delete.
To select all the list of MAC addresses, click Select All. A checkmark will appear in the box to the
left of each MAC address in the Available MAC Addresses to be Blocked table.
Port Triggering
Port triggering allows some applications running on a LAN network to be available to external
applications 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, Port Triggering operates as follows:
1. A PC makes an outgoing connection using a port number defined in the Port Triggering table.
2. The VPN firewall 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.
3. The remote system receives the PCs request and responds using the differen t port numbers that
you have now opened.
4. The VPN firewall matches the response to the previous request, and forwards the response to
the PC.
Without Port Triggering, this response would be treate d as a new connection request rather tha n 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.