I am having problems with my email (couldn't receive) and was looking around to see what the problem might be. One of the things I did was run a tracert to the mail server and although it did show the route was down at ISP another interesting thing caught my eye. A private address showed up that isn't in my internal DHCP scope nor does it show up on any internal machine. It appears to be between the internal and external nics on the ISA server. Here is a tracert out to my ISP; Tracing route to 67.182.16.225 over a maximum of 30 hops 0 biker.theboat.local [10.5.10.20] 1 cloud9.theboat.local [10.5.10.2] 2 10.249.168.1 3 67.182.16.225 I have no idea where the address 10.249.168.1 comes from. I can ping the address from any machine inside including the ISA server. It does not show up when I type ipconfig /all at the ISA server. Can anyone shed some light on this? Dan