User Guide

Chapter 5. Command Line Interface Reference 139
ETH IP FIREWALL
The router supports IP Internet Firewall Filtering to prevent unauthorized access to your system and network
resources from the Internet. This filter discards packets received from the WAN that have a source IP address
recognized as a local LAN address. This command sets Ethernet Firewall Filtering on or off and allows you to list
the active state.
Note 1:
This command requires a reboot
Note 2:
To perform Firewall Filtering, IP routing must be enabled.
ETH IP MTU
This sets the maximum transfer unit for the router. The default is 1500 bits.
ETH IP OPTIONS
RIP is a protocol used for exchanging IP routing information among routers. The following RIP options allow you
to set IP routing information protocol controls on the local Ethernet LAN.
Note:
This command requires a reboot.
eth ip firewall
on|off|list
on Sets firewall filtering on. IP routing
must
also be enabled for filtering to be performed.
off Sets firewall filtering off.
list Lists the current status of firewall filtering.
Example:
eth ip firewall list
Response:
The Internet firewall filter is currently on.
0 offending packets were filtered out.
eth ip mpu
<size>
[<
port#
>]
eth ip options
<
option
> on|off [<
port#
>]
option
Must be one of the following:
rxrip Receive and process IP RIP-1 compatible and RIP-2 broadcast packets from the Ethernet LAN.
Also receive and process RIP-2 packets that are multicast as defined by the
eth ip ripmulticast
command. Set this option if the local router is to discover route information from the Ethernet
LAN. The default is on.