Hi Peter,
With cisco ASA you have that functionality to send traffic on secure way with IOS 8.0.2 and later.
http://www.cisco.com/en/US/docs/security/asa/asa82/command/reference/l2.html#wp1772754
Secure Keyword specifies that connection to remote logging host uses SSL/TLS.
Note:-
A secure logging connection can only be established with a SSL/TLS- capable syslog server. If a SSL/TLS connection cannot be established, all new connections will be denied. You may change this default behavior by entering the logging permit-hostdown command.
Hope that Helps..
-GI
Rate if it Helps..