I have a few users who are having random connection issues with FTPing to their sites. Both users are located in the UK but both have different ISPs. During random times they will be unable to connect to FTP (using their domain or IP) but can connect to HTTP just fine, then after a while will be able to connect to FTP again. Any ideas what could cause this?
Ok, just to post a follow-up of what happend with this incase other members have this problem.
The issues were apparently unrelated, the first user reinstalled his FTP client and the problem was fixed. The second user found out his ISP started enforcing bandwidth throttling on port 21 (FTP) so he would time out when connecting over FTP because of his bandwidth usage for the month (swithing to a new service plan fixed the issue).