Proftpd: Can reach withing LAN but not outside LAN
I just installed proftpd on Mandriva Linux.
I can login to it using my normal user account from a computer within my LAN. However, when I try to reach it outside the LAN, I can't do it. It just hangs for some reason. I made sure that port forwarding on my router is set up. It points to 192.168.15.101 (my ftp server) for all inbound port 21 packets. I have tried restarting proftpd but this makes no difference.
If anyone can help, I would really appreciate it as this is a production server.