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From: Aaron Siegel <bulk_mail@siegel-tech.net>
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Date: Sat, 12 Nov 2005 23:38:49 -0700
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Subject: In a bit of a bind - DNS problems and ipfw
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Hello

I am having problems with my FreeBSD 5.4 gateway/firewall. When I enable a 
custom  firewall (ipfw) or the "Simple" firewall through rc.firewall my 
clients are unable to resolve DNS when DNS does work with the  "Open" ruleset 
that is provide by rc.firewall.  I create the custom firewall couple years 
ago and they work fine under 4.11 but after the upgrade I have not been able 
to get them to work. 

I sure I am doing something stupid but I am not smart enough to solve it at 
the moment. 

Thank you 
Aaron Siegel

Custom firewall rules
#Allow DNS 
$cmd 019 allow tcp from any to any 53 out via $pif
$cmd 018 allow udp from any to any 53 out via $pif

/etc/rc.conf
gateway_enable="YES"
firewall_enable="YES"
firewall_type="open"
natd_enable="YES"
natd_interface="dc0"

ifconfig_dc0="192.168.0.2"  #public interface  
ifconfig_fxp0="192.168.245.1 netmask 255.255.255.0" #private interface

/etc/rc.conf
I have commented out the following lines
 #${fwcmd} add deny all from any to 192.168.0.0/16 via ${oif}