Quick Reference Guide

ProSafe Wireless-N VPN Firewall SRXN3205 Reference Manual
5-32 Firewall Security and Content Filtering
v1.0, January 2010
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 PC’s request and responds using the different 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 treated as a new connection request rather than a
response. As such, it would be handled in accordance with the inbound service rules.
Note these restrictions with port triggering:
• 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 VPN firewall cannot be
sure when the application has terminated.
To add a port triggering rule:
1. Select Security > Port Triggering from the main/submenu. The Port Triggering screen is
displayed.
Note: For additional ways of allowing inbound traffic, see “Inbound Rules (Port
Forwarding)” on page 5-4.
Figure 5-18