News: This forum is now permanently frozen.
Pages: [1]
Topic: DHCP Relay / firewall blocking issue  (Read 1318 times)
« on: July 10, 2007, 20:46:50 »
apickard *
Posts: 1

So I have been reading the forums and have seen many questions about DHCP Relay. However I have not found a solution to my problem.

Here is my setup:

(http://www.arphost.net/lan.jpg)

OK. Not really important but my WAN side is all NAT'ed to Several WAN ip addresses. There are a few incoming connections that are NAT'd as well. I have a Cisco 5505 where the m0n0wall box is and it is doing the job great. I want gig between all subnets and a blade is quite costly for the catalyst.

SO My problem is I have a DHCP server sitting on the LAN. It is a win2k3 box. It works fine. I have all of the scopes defined correctly. In a cisco device you use the command IP HELPER <ip address of DHCP server> and all DHCP requests work fine across the router for ALL subnets ( This is how I can verify the scope settings). When the m0n0wall box is there, the requests get blocked from the 2 OPT X interfaces. I have firewall rules setup to allow ALL traffic with ALL protocols and have tried all variations of such with no luck. On the logs, the packets are getting denied by the firewall when there is a allow all rule. What I want is for the OPT X clients to have un-firewalled traffic to the LAN and all interface go out through the NAT on the WAN. Also several IP's need to be mapped to various servers on the LAN interface with specific ports only. This is all done and works prefectly! Ths only problem is the DHCP relay.

I cant figure this out. Any help would be appreciated. If you need more info just please ask.

Thanks,
Adam
« Last Edit: July 11, 2007, 06:47:58 by apickard »
 
Pages: [1]
 
 
Powered by SMF 1.1.20 | SMF © 2013, Simple Machines