We have problems connecting to a specific FTPSExplicit server with version 18.104.22.168 of edtFTPnet/PRO.
We never had problems connecting to this server using version 22.214.171.124, but we were forced to upgrade to version 126.96.36.199 because we got AccessViolationExceptions after moving the application from an older Windows server to Windows Server 2012.
There are other FTPSExplicit and normal FTP connections made by the same application that work fine on version 188.8.131.52 on the new server.
Using a minimal test application on my development PC (Windows 8.1) I can connect to the problematic FTPS server without problems using version 184.108.40.206, but also get the "Socket closed before handshake is complete (2)" when I switch to version 220.127.116.11.
I tried forcing a specific SSLVersion on the connection (tried all available enumeration values), without result.
Downgrading to version 18.104.22.168 is not an option because of the AccessViolationException issue.