Unable to connect with read timed out error

[cavax]

Goodrmorning, I'm using cyberduck every day, but I'm having a problem.

Somehow from a week a go it cant connect to certain ftp urls, it connects and then it fails telling me that there is a netowrk problem. It happens only on some address, witch are reachable using other tools or eaven the browser.

The only thing I found in the log is this one:

2015-12-15 11:02:07,567 [background-1] ERROR ch.cyberduck.core.ssl.CustomTrustSSLProtocolSocketFactory - Failure NativePRNG SecureRandom not available obtaining secure random NativePRNG

But i dont know if its important, because the connections are simple ftp, no ssl. What do i have to do?

[dkocher]

The log entry is unrelated. What is the network error message displayed?

[cavax]

Replying to dkocher:

The log entry is unrelated. What is the network error message displayed?

It says connection opened and it waits. Then after a couple of seconds it gives me "read time out error" and it suggest me to do a network diagnostic. But as I said with other tools it works and also with cyberduck on other ftps so is not the connection. Tried also to disable the firewall also if is sensless.