i have a remote server running linux/WHM/cpanel which i'm having no trouble connecting to via SSH (via the same internet connection).
however, when i try to connect with FTP, sometimes it works, and sometimes it gives me the following message:
Server said: I won't open a connection to 192.168.1.4 (only to 78.xxx.xxx.xxx) Error -162: PORT failed
sometimes it just works, and sometimes it doesn't!
the 78.xxx.xxx.xxx IP is the one i see when i check my ip using whatismyip.com on my local computer.
in addition to this, if i use a different internet connection it works fine.
my ISP doesn't seem to know what's going on.