Integration of proxy with http content security appliance ?

Hi
All

I'm not sure if this is the correct mailing lists or not.So i'm posting it in 
the security basics mailing lists.

I have an internal proxy server(SunWeb Proxy 4.x) with 3 LANs.I have a 
checkpoint firewall with 3 interfaces which are connected to the 3 LANs.
For caching of http traffics , I forward all http requests to proxy server , 
which then does proxying and then forward back to checkpoint firewall and goes 
to internet.proxy has one NIC and it's default gateway is pointed to firewall 
interface. This is a simple set up n working.

Now I have bought McAfee Security Content Management (SCM) which I want to use 
as http content security solution.It would do AV,PUP,Malware etc checking , URL 
filtering for my http requests which are coming to proxy.

My questions are as below :

1.Anyone has any such experience on how to integrate them for layer 3 
connectivity ?

Is there any special configs need to be done for Sun proxy to forward http 
checking to the content security box ?

Is there any specific network settings for McAfee Content security box ? 
currently the content security box is in explicit proxy mode.As per mcafee 
concepts guide , it should be in this mode. This box has only one option , i.e 
to specify a default gateway.It does not support OPSEC , 802.1Q etc


2.If you have integrated websense/N2H2 with squid/Sunwebproxy/WinProxy etc . 
Whats the conceptual integration menthods between proxy n content security box ?
what kind of configs I should do in proxy to forward the http packets to 
content seuciryt box and how the content security box would send http packets 
back to my proxy ?



Any configs help or conceptual helps would be helpfull..


Regards
Soumen Paul
Security Consultant
Cable & Wireless

CCNA CCSA CCSE JNCIA CSPFA CEH