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Stunnel is a program that allows you to encrypt arbitrary TCP connections inside SSL. Stunnel can also allow you to secure non-SSL aware daemons and protocols (like POP, IMAP, LDAP, etc) by having Stunnel provide the encryption, requiring no changes to the daemon's code. Stunnel uses a client/server model. This means you must install Stunnel on both servers.

I've personally used it to establish secure remote MySQL server connections for daemons which did not have proper MySQL/SSL support.