Wireless Firewall Router User's Guide

P-335 Series User’s Guide
Chapter 6 WAN 118
6.6 Traffic Redirect
Traffic redirect forwards WAN traffic to a backup gateway when the Prestige cannot connect
to the Internet through its normal gateway. Connect the backup gateway on the WAN so that
the Prestige still provides firewall protection.
Figure 58 Traffic Redirect WAN Setup
The following network topology allows you to avoid triangle route security issues (see the
Appendices) when the backup gateway is connected to the LAN. Use IP alias to configure the
LAN into two or three logical networks with the Prestige itself as the gateway for each LAN
network. Put the protected LAN in one subnet (Subnet 1 in the following figure) and the
backup gateway in another subnet (Subnet 2). Configure a LAN to LAN/Prestige firewall rule
that forwards packets from the protected LAN (Subnet 1) to the backup gateway (Subnet 2).
Multicast Select IGMP V-1 or IGMP V-2 or None. IGMP (Internet Group Multicast
Protocol) is a network-layer protocol used to establish membership in a
Multicast group - it is not used to carry user data. IGMP version 2 (RFC 2236)
is an improvement over version 1 (RFC 1112) but IGMP version 1 is still in
wide use. If you would like to read more detailed information about
interoperability between IGMP version 2 and version 1, please see sections 4
and 5 of RFC 2236.
Windows Networking (NetBIOS over TCP/IP): NetBIOS (Network Basic Input/Output System) are TCP
or UDP broadcast packets that enable a computer to connect to and communicate with a LAN. For
some dial-up services such as PPPoE or PPTP, NetBIOS packets cause unwanted calls. However it
may sometimes be necessary to allow NetBIOS packets to pass through to the WAN in order to find a
computer on the WAN.
Allow between LAN and
WAN
Select this check box to forward NetBIOS packets from the LAN to the WAN
and from the WAN to the LAN. If your firewall is enabled with the default policy
set to block WAN to LAN traffic, you also need to enable the default WAN to
LAN firewall rule that forwards NetBIOS traffic.
Clear this check box to block all NetBIOS packets going from the LAN to the
WAN and from the WAN to the LAN.
Allow Trigger Dial Select this option to allow NetBIOS packets to initiate calls.
Apply Click Apply to save your changes back to the Prestige.
Reset Click Reset to begin configuring this screen afresh.
Table 47 Advanced
LABEL DESCRIPTION