Squid and SSL

Dear squid users,

I checked the FAQ and user's guide but I can't get my proxy forwarding
SSL requests.
The FAQ says :
>> In firewall configurations, Squid will forward all SSL requests to
one other proxy,
>> defined with the ssl_proxy directive.

What does exactly mean "in firewall configurations" ?
Do I need another proxy ?

Thanks for your help.
Fred

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mailto:Frederic.Pailler@titn.alcatel.fr