apache behind a fw

[Diego Torres <dtorres@coral.dnsalias.org>]

i need to serve webpages under a domain (example.com), but i
have a problem. the machine with the external ip is a fw, that
does port forwarding to the apache box. this is not a very big
problem, but gets really annoying when i need to test the
server from inside the internal network. using example.com as
the domain leads to a route error, so i need to use the internal
ip of the apache box (and all the references to the domain
name on the webpages don't work). is this usual? how does a
isp setup apache & router to make the server work with the
domain name from inside the fw?

-- 
-- a strange game. the only winning move is not to play
Diego Torres - dtorres@coral.dnsalias.org - Madrid / España