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Why use a proxy server
How is it different
How does it work
Implemention
Summary
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| What is a Proxy Server? Why do I need one? |
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| Anyone interested in connecting their office to the Internet will eventually end up investing the possibility of using one of following: Dialup, Network Connecton,Router or Proxy Server Basic Dialup The Internet uses the TCP/IP protocol to transfer information around. When you use a dialup connection you are assigned an IP address that is attached to all ofyour outgoing requests for information. This IP address is included when the information is sent to you over the Internet. Your ISP uses a router to remember which modem port is using which IP address. It works as the traffic cop giving you all of your information and only your information. |
| Network Connection |
| If we however, now connect serveral computers on a network to the Internet through a single connection, we have a challenge. Once we start sending requests from various machines out onto the Internet how are we going to keep the returning information sorted out as to who is expecting it? |
| Router |
One solution is to use a router. We would obtain and assign IP addresses for each machine on our network as well as be sure that each workstation is using the TCP/IP protocol. The router then works as a traffic cop very similarly to the way it works for an ISP. Incoming packets are directed to the appropriate machine on the network. |
| Proxy Server |
| A proxy server is a server which handles Internet connections on behalf of another computer. It is a special software based server which remembers all the documents, files and www pages accessed through it. In other words,"network cache"for the Internet. The purpose of the proxy server is to "cache" (store) the HTML pages of frequently visited sites. Once you have configured your Web Browser to use the proxy server, your browser will contact the proxy server for the HTML page you wish to load, and if it exists on the proxy server it will be provided by the server. The end result is that for commonly viewed sites the speed of the transfer will be greatly increased, thereby saving you download time. Proxy servers are usually associated with firewalls. Workstations on networks which are separated from the Internet by a firewall must use a proxy server outside the firewall to retrieve Web documents and other files and pass them through to the workstation. Links www.datasync.com/techsupport/proxy.shtml www.netvision.net.il/nv/proxy/ |
| Paula Bruce |  pbruce@mcleodusa.net |
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