Hi, May be out of topic... Does anybody know if there is a dynamic DNS service (like dns2go, tzo, etc.) that works if I have an ISA server behind an ADSL NAT router? The router is a 3Com OCR-812. The dynamic DNS client software that runs in the ISA server should register the public IP address bound at the WAN port of the ADSL NAT router. Is it possible to map a TCP port from the public IP address that is dynamically assigned by the ISP DHCP server to the router WAN port to the ISA RFC 1918-like socket (ip_addr + tcp_port)? This mapping appears to need a static public IP address. TIA, Hugo