Core FTP

I have a new setup, first time user.

I have installed CoreFTP Server on Windows 7 64 bit.

I have disabled the firewall for testing.

I setup a domain and user.

I setup a self signed certificate.

I am using CoreFTP client

I can connect with FTP ok as long as PASV is off.

I try to connect with AUTH SSL or AUTH TLS.

I receive the following error:

220-Core FTP Server Version 1.2, build 447 Registered AUTH SSL
234 SSL enabled... start negotiation
SSL/TLS error - 0, SSL error - 5, error:00000005:lib(0):func(0):DH lib
Winsock error 10054 (An existing connection was forcibly closed by the
remote host. ) SSL Connection not established

How do I fix this?

The basis of the solution is that the 64 bit version cannot write the self-signed cert successfully to the subdirectory. Use the 32 bit version instead, even though you may be running the server on a 64 bit operating system.

Step 1. Unregister license from your installation.
Step 2. Uninstall 64 bit version of CoreFTP Server.
Step 3. Install 32 bit version of CoreFTP Server.
Step 4. Setup port forwarding in firewall from 0-65,536 to ports 21, 3000-3999 (Note 3000-3999) could be any 1000 port range.
Step 5. Setup PASV range in domain for 3000-3999
Step 6. Check to force SSL in domain.

Build 451 should correct the self-signed certificate (writing) issue.

If you right click on the Core FTP Server icon and "run as adminstrator", this will bypass the issue in 64-bit builds prior to 451.