dear all, I've published OWA but I can't connect to my internal web server. I also published POP3 and IMAP and all works fine. My configuration is: Router ADSL: public IP: 194.xxx.xxx.xxx internal ip : 192.168.1.1 ISA: external IP: 192.168.1.2 internal ip: 10.0.0.3 Exchange: 10.0.0.2 I've configured NAT on the router to send all requests to 192.168.1.2 (works fine cause POP3 and IMAP works) I've created a destination set named OWA setting Name/IP Range to 194.xxx.xxx.xxx cause I don't have a DNS entry to resolve a domain name (... don't ask me why... I know it is a little strange!): is this correct?? Or do I have to set it to 192.168.1.2?? How can I trace an external connection to see where the problemi is? (I followed the instructions in the tutorial area and in Tom book). I also tried to scan from outside my public ip and I find only port 110 open: i think this is a result from the Secure mail wizard, isn'it? Why I don't find also the IMAP port (it works anyway)? Thanks Stefano Peduzzi