I’m new at network security. I’ve setup OWA with SSL and it works great. I need a way to only have external requests open for OWA when using webmail.domain.com and not our external IP address. Right now, anyone who types our extenal DNS address or IP will receive our OWA page. I know ISA 2006 would fix this issue but we can’t afford such a proxy server. I need to protect our external IP address and our network. Any sugesstions?