I'm currently trying to deploy my project to my webserver using FTPS and unfortunately it just works partially. I'm using PHPStorm on (K)Ubuntu 14.10.
About 50% of the FTPS connections aren't working (it seems very randomly distributed to me). In the other 50% it works very well.
Because the notifications in PHPStorm are not really helpful (something like "didn't work" does not help at all to find the problem) I looked into the server logs to see what happens there:
There are two different situations:
SSL/TLS required but absent for authentication, denying USER command
unable to accept TLS connection: received EOF that violates protocol
unable to open data connection: TLS negotiation failed
Usually it's just the first one (I think the second one just happens in specific cases, so lets concentrate on the first one).
For me it looks like, that PHPStorm sometimes isn't using SSL/TLS to connect to the server and sometimes it does, but that would be strange behavior and I guess there is another problem.
Also it doesn't happen with some special files. It seems just random behavior and usually if it doesn't work with one file after one or two tries it works again. But yeah, it's very very annoying.
Any educated guess would be really helpful!
BTW: PHPStorm does not have "real logs" somewhere (or something containing more than "works" and "doesn't work")?