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By convention, the PAC file is normally named proxy.pac. The WPAD standard uses wpad.dat. The .pac file is expected to contain at least one function: FindProxyForURL(url, host), with two arguments and return value in specific format: * url is the URL of the object * host is the host-name derived from that URL.
The PAC files are discussed in the Proxy auto-config article. Use caution when configuring a WPAD server in a virtual hosting environment. When automatic proxy detection is used, WinHTTP and WinINET in Internet Explorer 6 and earlier send a "Host: <IP address>" header and IE7+ and Firefox sends a "Host: wpad" header.
However, depending on how the proxy is configured, a censor may be able to determine the pages loaded and/or determine that the user is using a proxy server. [2] For example, the mobile Opera Mini browser uses a proxy-based approach employing encryption and compression in order to speed up downloads. This has the side effect of allowing it to ...
The general format of the field is: [2] X-Forwarded-For: client, proxy1, proxy2 where the value is a comma+space separated list of IP addresses, the left-most being the original client, and each successive proxy that passed the request adding the IP address where it received the request from.
The client is now being proxied to the remote host. Any data sent to the proxy server is now forwarded, unmodified, to the remote host [3] and the client can communicate using any protocol accepted by the remote host. In the example below, the client is starting SSH communications, as hinted at by the port number in the initial CONNECT request.
A proxy list is a list of open HTTP/HTTPS/SOCKS proxy servers all on one website. Proxies allow users to make indirect network connections to other computer network services. [ 1 ] Proxy lists include the IP addresses of computers hosting open proxy servers, meaning that these proxy servers are available to anyone on the internet.
A de facto standard for identifying the originating protocol of an HTTP request, since a reverse proxy (or a load balancer) may communicate with a web server using HTTP even if the request to the reverse proxy is HTTPS. An alternative form of the header (X-ProxyUser-Ip) is used by Google clients talking to Google servers. Superseded by ...
Example scenario: A client on the Internet (cloud on the left) makes a request to a reverse proxy server (red oval in the middle). The proxy inspects the request, determines that it is valid and that it does not have the requested resource in its own cache. It then forwards the request to some internal web server (oval on the right). The ...