How to DNAT the only NetBios broadcast traffic (03:00:00:00:00:01)??

["Bassam A. Al-Khaffaf" <bassam@palettemm.com>]

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Dear All,
   I am implementing a Linux box gateway that lunch my own firewall (I
wrote my own iptables rules). The gateway connects two LANs, LAN1:
192.168.1.0/24 and LAN2: 192.168.0.0/24. LAN1 contains a windows 2000
server domain controller IP: 192.168.1.231 and LAN2 contains my clients
based on windows xp.
 
In fact I got stuck on how to forward ONLY and ONLY the NETBIOS
broadcast traffic (03:00:00:00:00:01) from any machine on LAN2 to the
domain controller on LAN1. Take note that the NETBIOS traffic is carried
on IEEE 802.3 Ethernet.
 
I wrote the following iptable rule, but here all the traffic will be
directed from LAN2 to the domain controller on LAN1
Iptables –t nat –A PREROUTING –I eth1 –j DNAT –to-destination
192.168.1.231
 
So can anybody help me on how can I forward the traffic with destination
MAC address 03:00:00:00:00:01 from LAN2 to the domain controller
(192.168.1.231) on LAN1?
 
Thanks for your support
 
Regards
Bassam
 
 

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