Apache on port 80!

[Gatman]

Ok this is extremely wierd cause I've installed apache so many times with no problems. I have freeeBSD release 4.3 updated to 4.4-RC running on a dual PII 450 box. Ever since I recompiled the system binaries and kernel to 4.4 I have not been able to get apache builds 1.36 - 2.0.16 to run on port 80 it runs fine on 81. For some reason port 80 is closed to the outside world despite my ipfw rules.. However all the machines I have behind this box can hit port 80 just fine.

Below is all of my relevent system info:

I'm running natd & ipfw with the following rules
/sbin/natd -dynamic -interface xl0 -f /etc/natd.conf
/sbin/ipfw -f flush
/sbin/ipfw add divert natd all from any to any via xl0
/sbin/ipfw add pass all from any to any
/sbin/ipfw add 65000 pass all from any to any

My basically empty natd.conf:
interface xl0
dynamic yes


My httpd.conf is fairly long but trust me when its set to run on any port other than 80 all is well:

My /etc/services Entry for port 80:
http 80/tcp

http://www www-http

#World Wide Web HTTP
http 80/udp

http://www www-http

#World Wide Web HTTP

My rc.firewall has been disabled.

Please help I'm stumped and I don't feel like reinstalling the os again.

Thanks


P.S

How can I tell if my ISP is blocking traffic to port 80?