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 From:  Christiaens Joachim <jchristi at oce dot be>
 To:  "'P B'" <pjb141 at hotmail dot com>, m0n0wall at lists dot m0n0 dot ch
 Subject:  RE: [m0n0wall] Rule Confirmation / Access from outside local netw ork
 Date:  Wed, 11 Feb 2004 14:16:46 +0100
> -----Original Message-----
> From: P B [mailto:pjb141 at hotmail dot com]
> Hi,
> I am former Smoothwall/IPcop user and have moved to m0n0wall 
> (an excellent 
> solution, thanks Manuel) from release 27. I have a fairly 
> typical setup 
> comprising the following:
> WAN interface - Ethernet ADSL modem
> LAN interface -
> DMZ interface - - single 
> Clarkconnect box running 
> e-mail/web servers
> I was using NMAP from the Clarkconnect box to check for open 
> ports, and 
> discovered that I could scan the boxes on the LAN interface 
> (not a good 
> thing!).
> I reviewed the rules I set up when I configured m0n0wall and 
> discovered that 
> I had entered a DMZ -> any rule (not appreciating that this 
> would also allow 
> access to the LAN).
> I have now modified the rules to lock down the configuration, 
> but would 
> appreciate comments on my revised setup:
> 1. Inbound NAT for ports 25, 80, 143 and 443 to the same 
> ports on my NAT'd 
> server IP ( - allowing automatic addition of the 
> firewall rules 
> for the same
> 2. Retain the default LAN -> any rule
> Now the crucial one:
> Action: PASS
> Interface: DMZ
> Protocol: any
> Source: DMZ subnet
> Destination: *NOT* LAN subnet
> (i.e. DMZ can access everything EXCEPT the LAN subnet)
> Is there a better solution without limiting ports/protocols?

It is definately better

> One other query:
> How can I allow machines on my LAN interface to access the 
> DMZ server via 
> the domain name (i.e. http://www.domain.com rather than via 
> I am running Gallery which can be 
> configured to use 
> EITHER the www.domain.com name OR the IP 
> address. Using the 
> domain name I can't access Gallery from my LAN, with the IP 
> address it can't 
> be accessed from the outside world!
> Thanks,
> Peter
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