Which IP? Apache BIND Internal External? arrrggh

[robbo007]

As this is still a test environment I have the Debian setup at home.

ADSL router (one fixed external IP) Debian connected to router using internal 192.168.1.x address. Port 80 in the router open and pointing to my debian box on the internal IP.

I get no errors only that mydomain.ltd does not resolve correctly unless I hack and specify the internal IP of the debian box in the /etc/apache2/sites-enabled/ispcp.conf

if I leave it as created by ISPCP with the external IP it will resolve mydomain.ltd to the ISPCP logon screen that I use on admin.mydmain.ltd

This happens to all domains I add.

How can I post the output. (Sorry I'm a new user)

Thanks,
Rob