If you can't connect to any FTP, then most definitely it is the problem on your end.
In this case:
• ISP can block your FTP traffic
• There was change on your settings (passive etc.)
• There was change on your firewall
There is a lot of stuff that might go wrong.
Try this:
Use command line to connect to FTP
And try to download or upload something from your server.
(Open command prompt if you are using XP and type ftp <server name>
Answer user id and pass
Then type:
ls – to list directory
cd – to change directory
get – to download
put – to upload
Make sure you type I before you upload/download to change to binary.
Check if that helps.
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