- Plesk 12.5 for Linux
FTP is not accessible on a server behind NAT:
# telnet 203.0.113.2
telnet: connect to address 203.0.113.2: Connection refused
This is Plesk internal issue with id #PPP-17286 , it was fixed in Plesk 12.5, microupdate #3
Apply latest Plesk microupdates .