Network Setup
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First of all, the messages transmitted by a cache to locate a specific object are sent to
Sibling caches, which are placed at the same level in the hierarchy. Then, the caches
placed at the Parent level are queried if the replies from sibling caches did not succeed.
Enter the host or IP address of an ICP capable web cache peer in Host, then select its
relationship to the CyberGuard SG appliance’s web cache (as described above) from
Type and click Apply.
Set up LAN PCs to use the web cache
Once the web cache has been set up, PCs on the LAN must have their browsers
configured appropriately.
In Internet Explorer, select Internet Options from the Tools menu. Select the
Connections tab and click LAN Settings. Under Proxy Server, check Use proxy
server… and enter the IP address of your CyberGuard SG appliance in Address.
Note
The CyberGuard SG appliance’s web cache uses port 3128 by default.
Enter 3128 in Port, select Bypass proxy for local addresses and click OK.
ICAP client
The CyberGuard SG appliance’s ICAP client allow you to utilise a third-party ICAP server
as an intermediary between LAN PCs browsing the web and/or traffic incoming from the
web. Outgoing web requests or incoming web traffic is passed off to the ICAP server for
processing before being returned to the requesting LAN PC.
The ICAP server may process outgoing web requests from a LAN PC using a REQMOD
service, or incoming web traffic from an external web server using a RESPMOD service.
A typical function of a REQMOD service would be URL filtering, a typical function of a
RESPMOD service would be virus scanning.
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