Transparent proxy

The Adaptive Redirection Module (ARM) component of Websense Content Gateway
processes requests from a switch or router and redirects user requests to the proxy
engine. The proxy establishes a connection with the origin server and returns
requested content to the client. ARM readdresses returned content as if it came
directly from the origin server.


The router may use Generic Routing Encapsulation (GRE) to forward IP packets to
the proxy. GRE is a tunneling protocol that allows point-to-point links between
multiple traffic routing hops.A router may also use Layer 2 (L2), which does not use GRE. Websense recommendsthe use of L2 if the router supports it. With L2 redirection, Content Gateway must be
on the same subnet as the WCCP device (that is, Layer 2 adjacent).


****If using L2 the router or switch must be Layer 2-adjacent
(in the same subnet) as Content Gateway.