Price On RequestProxy Server shares one internet connection throughout the network simultaneouslyIn an enterprise that uses the Internet, a proxy server is a server that acts as an intermediary between a workstation user and the Internet so that the enterprise can ensure security, administrative control, and caching service. A proxy server is associated with or part of a gateway server that separates the enterprise network from the outside network and a firewall server that protects the enterprise network from outside intrusion.A proxy server receives a request for an Internet service (such as a Web page request) from a user. If it passes filtering requirements, the proxy server, assuming it is also a cache server , looks in its local cache of previously downloaded Web pages. If it finds the page, it returns it to the user without needing to forward the request to the Internet. If the page is not in the cache, the proxy server, acting as a client on behalf of the user, uses one of its own IP addresses to request the page from the server out on the Internet. When the page is returned, the proxy server relates it to the original request and forwards it on to the user.To the user, the proxy server is invisible; all Internet requests and returned responses appear to be directly with the addressed Internet server. (The proxy is not quite invisible; its IP address has to be specified as a configuration option to the browser or other protocol program).An advantage of a proxy server is that its cache can serve all users. If one or more Internet sites are frequently requested, these are likely to be in the proxy's cache, which will improve user response time. In fact, there are special servers called cache servers. A proxy can also do logging.The functions of proxy, firewall, and caching can be in separate server programs or combined in a single package. Different server programs can be in different computers.For example, a proxy server may in the same machine with a firewall server or it may be on a separate server and forward requests through the firewall.Proxy Server Features :-Inbuilt HTTP (Web) proxy allows all local area network users to browse the web via a single modem or any other like Dsl, DTH.Cable Connection etc .Dials on demand (Connection on demand)Caches frequently used pages.Can allow/restrict access on a per-user basis.Refuses access to nominated URL'sInbuilt proxy server with optional firewall. ( Squid )An unlimited number of user definable Direct connect TCP proxies allows you to connect to News Servers, Directory Servers, etc.Squid is...A full-featured Web proxy cache Designed to run on Unix systems Free, open-source software The result of many contributions by unpaid (and paid) volunteers-squid supports...Proxying and caching of HTTP, FTP, and other Mispronouncing for SSLCache hierarchies ICP, HTCP, CARP, Cache Digests Transparent poaching (Squid v2.3 and above)Extensive access controls HTTP server acceleration of DNS hookup Benefit of proxy server?Content Filtering(Block website having illegal or illicit content)URL blocking(Using Proxy we can block unrequited website like naukri.com, monster.com, Facebook.org,orkut.com etc ..90 % of companies valuble bandwidth waste to this website , employ also do there personal work in office time , this can be protected by using proxy service on gateway level)Reporting / Monitoring (we can view or printout weekly monthly report of surfing report of particular employees).Save our valuable band width Fast internet connectivity Reducing chances of virus infection / spy ware inspection
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