The following is another difference between transparent and explicit authentication: TransparentĤ01 - is sent from the WSA when authentication is required. The WSA will always send its upstream request as a transparent style request, since the WSA is acting as it's own client, UNLESS the WSA is configured to specifically use an explicit upstream proxy. Whereas in explicit, the WSA ONLY responds to explicit HTTP requests. The only major difference between transparent and forward mode on the WSA is that in transparent mode, the WSA will respond to both transparent and explicit HTTP requests. Reverse proxy is where the proxy is intended to be on the same network as the HTTP servers and its purpose is to serve up content for these HTTP servers. This is slightly misleading, as this is really " transparent" or " explicit" mode, both of which are forward proxy deployments. The WSA can be configured for " transparent" or " forward". The URI for a transparent request does not contain the protocol with the host: Transparentīoth will contain an HTTP Host header that specifies the DNS host. A transparent request has a destination IP address of the intended web server (DNS resolved by the client).Ģ. An explicit request has a destination IP address of the configured proxy. There are a few differences between explicit and transparent client HTTP requests:ġ. On the contrary, if a request is explicitly sent to the WSA, the WSA will respond with it's own IP information. When requests are being redirected to the WSA transparently, the WSA must pretend to be the OCS (origin content server), since the client is unaware of the existence of a proxy. This is expected to be available in the near future. The WSA can use all of these deployments except for bridged mode. PAC file, which in turn, references the proxy Traffic goes in one NIC and out the other ( not available)Ĭlient browser is explicitly configured to use a proxyĬlient browser is explicitly configured to us a. How the WSA HTTP proxy obtains the client's request can be defined as one of two ways: Transparently or Explicitly.Įach of these deployments have several specific configuration options: DeploymentĪ Layer 4 switch is used to redirect based on destination port 80Ī WCCP v2 enabled device (typically a router, switch, PIX, or ASA) redirects port 80ĭual NICs, virtually paired. the original client IP address: X-Forwarded-For (XFF), or transparent proxy. Most commonly, the servers all host the same content, and the load balancers job is to distribute the workload in a way that makes the best use of each.
This specifically means that the Cisco Web Security Appliance (WSA), as a web proxy, will have two sets of TCP sockets per client request: HTTP requests often pass through one or more proxy servers before they. The goal of a proxy is to be the middle man (proxy) between HTTP clients and HTTP servers. What is the difference between Transparent and Forward proxy mode?