Please check your firewall logs to see what's happening. As far as SNF is concerned there's no difference between running SNFServer naked, running it as a .SO, or running it as a DLL -- The SYNC section is exactly the same code in all cases.

The following is the authentication protocol:

• First the connection is closed immediately by the SYNC server.
• Then SNFMulti engine will attempt to connect to the SYNC server again after about 30 seconds.
• The next connection would produce a challenge and would read a response (all XML w/ base64 encoded contents). Once the challenge is met with a correctly encoded response the SYNC session would continue.
• Each following SYNC session would look similar.
• Once SYNC is established each session will be initiated by the SNFMulti engine about once per minute (this timing is dynamic).