This article is from the Firewalls FAQ, by Matt Curtin cmcurtin@interhack.net and Marcus J. Ranum mjr@nfr.com with numerous contributions by others.
SSL is a protocol that allows secure connections across the Internet.
Typically, SSL is used to protect HTTP traffic. However, other protocols
(such as telnet) can run atop SSL.
Enabling SSL through your firewall can be done the same way that you would
allow HTTP traffic, if it's HTTP that you're using SSL to secure, which is
usually true. The only difference is that instead of using something that
will simply relay HTTP, you'll need something that can tunnel SSL. This is a
feature present on most web object caches.
You can find out more about SSL from Netscape
<URL:http://developer.netscape.com/docs/manuals/security/sslin/contents.htm>.
 
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