Motorola 2200 Administrator's Handbook page 72

Administrator's Handbook
Address Mapping (NAT): Specifies whether you want the Gateway to use network address translation
(NAT) when communicating with remote routers. NAT lets you conceal details of your network from remote
routers. By default, address mapping is enabled.
Restrictions: This setting determines the types of traffic the Gateway accepts from the WAN. Admin Dis-
abled means that Gateway traffic is accepted but administrative commands are ignored. None means that
all traffic is accepted. Admin Disabled is the default.
Advanced:
Advanced
If you click the
other routers that use different subnet masks.
From the pull-down menu, choose Off, RIP-1, RIP-2, RIP-1 compatibility, or RIP-2 with MD5.
Enable Proxy ARP: Checking the checkbox will enable the Gateway to respond when it receives an
Address Resolution Protocol message for devices behind it.
Multicast Forward: If you check this checkbox, this interface acts as an IGMP proxy host, and IGMP pack-
ets are transmitted and received on this interface on behalf of IGMP hosts on the LAN interface.
IGMP Null Source Address: If you check this checkbox, the source IP address of every IGMP packet trans-
mitted from this interface is set to 0.0.0.0. This complies with the requirements of TR-101, and removes
the need for a publicly advertised IP address on the WAN interface. This checkbox is only available if "Mul-
ticast Forward" is checked.
IP Gateway
Enable Gateway Option: You can configure the Gateway to send packets to a default gateway if it does
not know how to reach the destination host.
Interface Type: If you have PPPoE enabled, you can specify that packets destined for unknown hosts
will be sent to the gateway being used by the remote PPP peer. If you select ip-address, you must enter
the IP address of a host on a local or remote network to receive the traffic.
Default Gateway: The IP Address of the default gateway.
Other WAN Options
PPPoE: You can enable or disable PPPoE. This link also allows configuration of NAT, admin restrictions,
PPPoE username/password, and connection type.
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link the Advanced WAN IP Interface configuration page appears.
RIP Receive Mode: Routing Information Protocol (RIP)
is needed if there are IP routers on other segments of
your Ethernet network that the Motorola Netopia® Gate-
way needs to recognize. Set to Off, Netopia Embedded
Software Version 7.7.4 will not accept information from
either RIP-1 nor RIP-2 routers. With Receive RIP Mode
set to RIP-1, the Motorola Netopia® Gateway will
accept routing information provided by RIP packets from
other routers that use the same subnet mask. Set to
RIP-2, Netopia Embedded Software Version 7.7.4 will
accept routing information provided by RIP packets from