Hi, maybe you remember that I'm running my test installation of ISA on a dial-up DSL line where the IP address changes every 24 hours. I have created a web publishing rule that redirects the /exchange URL to my internal exchange server (other paths are in place, don't worry :-). As I have registered a "domain" with dyndns.org my approach was to specify the destination by domain name. Now, since I've done that, I'm getting a 14149 error when the webproxy service is restarted. Here's the content (roughly translated from german error text) Web proxy service was unable to listen to 80.133.146.154 port 80. This may be due to a NIC failure. Error codes below: 0000: 41 27 00 00 A'.. In the event log entries, the IP address above never changes. There's two of these errors, one for port 80 the other for 443. I changed the resetsrvpubrules script to walk through the destination sets used with web publishing and found that the destination set type is set to fpcDestinationTypeDomain, thus querying the Ip_To and Ip_From attributes yields an error. I suspect that the IP address was cached/saved somewhere when I created the destination set and/or the web publishing rule. There are obviously no means to change this IP once it is stored. I still have to research this further, but for now it seems that this is a bug or a design flaw, because I don't really care what IP address my domain name resolves to, otherwise I would use the IP address, right? Do you know of any workaround except specifying destination by IP? And if I did so, would that work with OWA? Thanks Mark