What I need to know is the public IP address of one of our routers (linksys) in a regional office. It's on one of those ISP plans that changes the IP every once in awhile (the IP was good for a couple of months and then it dropped). I have access to the computers behind the router, but only when I know the public IP. I can set something up from behind the router to send to me (via email or whatever) to update me on what the Public IP is, but how do I find out what the WAN IP is from behind the router? I tried tracert, but the first hop times out and reports back no IP address until it hits the router's gateway. Another way is to look at our FTP server logs to find out what the source IP is since it does send data every other day. This does work but the logs are a pain in the ass to get (not served locally), and I have to make a guess on which one is the proper DNS name (not that difficult but still not a very slick way of doing it). I'm looking for something automatic that can be run on a schedule via the command prompt (like my tracert idea - but one that works). Any ideas?