I am unable to connect to a particular FTP server at Fasthosts over my usual ISP connection, using any of Filezilla, Notepad++ or WinSCP FTP clients on either my PC or my laptop. However, I CAN connect to the Fasthosts FTP server if I use a VPN or another ISP network (ie if I change my IP). My IP is a fixed address 188.8.131.52 on the Free.fr ISP network in France (where I'm currently based).
Here is an example log from WinSCP FTP client showing connection messages:
2016-01-30 11:55:29.630 Connecting to ftp.normandie-chambres.co.uk ...
2016-01-30 11:55:29.673 Connected with ftp.normandie-chambres.co.uk. Waiting for welcome message...
2016-01-30 11:55:39.910 425 Sorry, invalid address given
2016-01-30 11:55:39.910 Disconnected from server
2016-01-30 11:55:39.910 Connection failed.
2016-01-30 11:55:39.910 Got reply 1004 to the command 1
2016-01-30 11:55:39.931 (EFatal) Connection failed.
2016-01-30 11:55:39.931 Disconnected from server
2016-01-30 11:55:39.931 Connection failed.
I have no problem connecting via my normal IP address to FTP servers for other website hosts (e.g.OVH) - only Streamline is affected and only from this IP address.
Streamline says that my IP does not resolve to a hostname and that is why I cannot connect to their server; but CMD Prompt nslookup gives me this hostname result:
Serveur : dns2.proxad.net
*** Aucun enregistrement internal type for both IPv4 and IPv6 Addresses (A+AAAA) disponible pour 184.108.40.206
The server "dns2.proxad.net" at address "220.127.116.11" is the server of my ISP free.fr. However, the line at the end translates as "No internal type for both ivp4 and ivp6 addresses (a+aaaa)". Does this mean anything to anyone here and could it point towards the root of the problem? Both my ISP and Web Host say that it is nothing to do with them; they may be right but how to check?