Web Cache
100
Peers
The SnapGear appliance’s web cache can be configured to share cached objects with,
and access objects cached by, other web caches.
Web caches communicate using the Internet Cache Protocol (ICP). ICP is used to
exchange hints about the existence of URLs in neighbour caches. Caches exchange ICP
queries and replies to gather information to use in selecting the most appropriate location
from which to retrieve an object.
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 SnapGear 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 SnapGear appliance in
Address
.
Note
The SnapGear appliance’s web cache uses port
3128
by default.
Enter
3128
in
Port
, select
Bypass proxy for local addresses
and click
OK
.
