[Xymon] spoofed IP's in hosts.cfg

I use xymon to monitor not only servers but also many specific URL's through ports that we host for various purposes. Some of the things I monitor are behind multiple NAT firewalls and the IP's of the hosts are not only irrelevant but not forwarded through my firewall and thus not needed to be in my hosts.cfg file which is not on my local network. I did some searching and saw that I could enter 0.0.0.0 for the IP's, but now my hosts.cfg file doesn't work. What can I enter as the IP's for hosts in my hosts.cfg file when I don't want the IP's specified?

Thank you.

Kris Springer