I had the same problem with DHCP getting blocked on bridged interfaces. It got solved by changing
the cable from opt1 to opt2 and from opt2 to opt 1. I found out, that the block is only working in
one direction. Strange, but this way it worked for me. I´m using the following configuration now
with 2 filtering bridges:
 
LAN1 with DHCP-Server - m0n01 - s2m-router1--------------------s2m-router2 - m0n02- LAN2
 
Both m0n0walls are acting as filtering bridge to make voip run smoothly over the 2mbit-s2m
connection between the two locations. LAN2 get´s IP´s assigned by the DHCP-Server from LAN1.
 
regards,
Holger Bauer 

	-----Ursprüngliche Nachricht----- 
	Von: Jon Tackabury [mailto:jtackabury at binaryfortress dot com] 
	Gesendet: Sa 04.09.2004 19:36 
	An: m0n0wall at lists dot m0n0 dot ch 
	Cc: 
	Betreff: RE: [m0n0wall] Bridging Question
	
	

	Update: I seem to have got the rules to sort of work.  However, I can't get
	DHCP to work on that interface.  I created a rule that allows all UDP
	traffic anywhere on the OPT2 interface, but in my system log I can see all
	the DHCP requests being dropped.  Anyone else ever tried to do this?
	
	Thanks,
	Jon
	
	-----Original Message-----
	From: Jon Tackabury [mailto:jtackabury at binaryfortress dot com]
	Sent: Saturday, September 04, 2004 12:48 PM
	To: m0n0wall at lists dot m0n0 dot ch
	Subject: [m0n0wall] Bridging Question
	
	I have bridged OPT2 with OPT1, but for some reason none of my packet rules
	are taking effect.  I have enabled "Enable filtering bridge" under the
	advanced settings but this doesn't seem to do anything.  I have a rule on
	OPT2 that says drop all traffic, yet all traffic is still being passed.
	Have I mis-understood how to work bridging?  Can someone give me any ideas?
	
	Thanks,
	Jon
	
	
	
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