FVS338 ProSafe VPN Firewall 50 Reference Manual
Router and Network Management 6-5
v1.0, September 2006
You can control specific inbound traffic (i.e., from WAN to LAN and from WAN to DMZ).
Inbound Services lists all existing rules for inbound traffic. If you have not defined any rules, only
the default rule will be listed. The default rule blocks all inbound traffic.
Each rule lets you specify the desired action for the connections covered by the rule:
•BLOCK always
• BLOCK by schedule, otherwise Allow
• ALLOW always
• ALLOW by schedule, otherwise Block
You can also enable a check on special rules:
•VPN Passthrough – Enable this to pass the VPN traffic without any filtering, specially used
when this firewall is between two VPN tunnel end points.
•Drop fragmented IP packets – Enable this to drop the fragmented IP packets.
•UDP Flooding – Enable this to limit the number of UDP sessions created from one LAN
machine.
•TCP Flooding – Enable this to protect the router from Syn flood attack.
•Enable DNS Proxy – Enable this to allow the incoming DNS queries.
•Enable Stealth Mode – Enable this to set the firewall to operate in stealth mode.
As you define your firewall rules, you can further refine their application according to the
following criteria:
•LAN Users – These settings determine which computers on your network are affected by this
rule. Select the desired IP Address in this field.
•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.