Filter
Top Products
Firewall Protection
185
ProSafe Wireless-N 8-Port Gigabit VPN Firewall FVS318N
Figure 100.
2. Click the Stop button. Wait until the Poll Interval field becomes available.
3. Ente
r new poll interval in seconds.
4. Click the Set I
nterval button. Wait for the confirmation that the operation has succeeded
before you close the window.
Configure 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 the port-triggering
feature requires that you know the port numbers used by the application.
Note: Port triggering is supported for IPv4 devices only.
Once configured, port triggering operates as follows:
1. A comp
uter makes an outgoing connection using a port number that is defined in the
Port Triggering Rules table.
2. The wireless
VPN firewall records this connection, opens the additional incoming port or
ports that are associated with the rule in the port triggering table, and associates them with
the computer.
3. The remote
system receives the computer’s request and responds using the incoming port
or ports that are associated with the rule in the port triggering table on the wireless VPN
firewall.
4. The wireless
VPN firewall matches the response to the previous request and forwards the
response to the computer.
Without port triggering, the response from the externa
l application would be treated as a new
connection request rather than a response to a request from the LAN network. As such, it
would be handled in accordance with the inbound port-forwarding rules, and most likely
would be blocked.