Planet Technology 802.11g Wireless ADSL 2/2+ Router ADW-4401A/Bv2 - Manual (Page 55)

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RIP-1 is universally supported, but RIP-2 carries more information. RIP-1 is adequate
for most networks. Only consider
RIP-2 if your network has unusual topology.
Both RIP-2B and RIP-2M sends the routing data in RIP-2 format. RIP-2B uses subnet
broadcasting while RIP-2M uses multicasting.
Direction: Select the RIP direction from None, Both, In Only and Out Only.
Multicast: IGMP (Internet Group Multicast Protocol) is a session-layer protocol used
to establish membership in a multicast group. The ADSL router supports both
IGMP-v1 and IGMP-v2. Select None to disable it. Please refer to
Internet Multicast .
The only difference is the interface.
3.10.4 Firewall
Go to Advance Setup-> Firewall to set firewall rule.
User can enable or disable firewall feature of the ADSL router in the page.