Questions regarding external IP & port forwarding
I've set up an ftp server using vsftpd and on my cable connection at home I'm able to find my IP address no problem and ftp in from anywhere. The issue is when I bring the server into work, I use one of those ip lookup websites and I can't log in using the ip that is provided. It is a DSL connection though a westell 327W router. I've set up port forwarding to the server's IP on port 21 and pasv 50000 to 60000. I try ftp'ing from the command line and am immediately denied. From what I can tell, I'm not even hitting the router. If I do a geographic search on the web for the ip address, it shows that it's 30 miles away from the actual location. I'm still pretty new to networking, but I'd appreciate any information.
I've read about DMZ, NIS, DNS, port forwarding, bridge ip, etc.. I'm lost here and could use some help.