Solved

proxy server

Posted on 2006-10-20
5
297 Views
Last Modified: 2010-03-19
what is a proxy server and why might someuse them.
0
Comment
Question by:al4629740
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
  • 2
5 Comments
 
LVL 12

Expert Comment

by:NetAdmin2436
ID: 17778038
A proxy server is commonly used for security. It has the ability to filter out sites or only allow certain sites. It also can authenticate users, so non authenticated traffic will be blocked. A better explanation I think would be the definition from wikipedia, take a look!

http://en.wikipedia.org/wiki/Proxy_server
0
 
LVL 51

Accepted Solution

by:
Keith Alabaster earned 250 total points
ID: 17780163
A proxy can do many things.

Its use normally breaks down to one or more of the following:

When a browser uses a proxy server, the proxy terminates the connection request and reinitiates it from its own IP address. For example, if you make a call to goole.com from your workstation through a proxy, the proxy would terminate your request and the make a new request to google on your behalf if the rules of the proxy allowed that traffic to pass. The proxy will also pass authentication and encryption information to the end site. When the other site responds it, it is back to the Proxy server. The proxy terminates the connection and passes the data back to the original calling web browser. As part of this activity, the outgoing traffic is assigned the IP addresses of the Proxy server, not the ip address of the original web browser client. (identical to normal NAT).

The purpose of the proxy is to hide the ip address of the original work stations, allow or deny access to traffic that is against the policy being enforced and to authorise the user of the proxy.

Proxies exist for standard web traffic and socks traffic  ie proxies can work for traffic other than browser based http/https/passive ftp etc. ISA server is probably one of the best proxy servers on the market and is EAL4+ accredited, the highest level in the world currently for the Common Criteria.

0
 
LVL 13

Expert Comment

by:haim96
ID: 17780418
proxy server have two main functions:

1. you can use it as a buffer for income internet traffic, this will alow you to access some web site fatser then usual.
   
2. you can use it as filter to outgoing request  to block sites that you don't want your clients/childrens/etc get access to.

http://en.wikipedia.org/wiki/Proxy_server
0
 
LVL 13

Expert Comment

by:haim96
ID: 17780422
opsss... you already got this link :)
0
 
LVL 51

Expert Comment

by:Keith Alabaster
ID: 17784274
Thank you :)
0

Featured Post

Online Training Solution

Drastically shorten your training time with WalkMe's advanced online training solution that Guides your trainees to action. Forget about retraining and skyrocket knowledge retention rates.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

#Citrix #Citrix Netscaler #HTTP Compression #Load Balance
If you're not part of the solution, you're part of the problem.   Tips on how to secure IoT devices, even the dumbest ones, so they can't be used as part of a DDoS botnet.  Use PRTG Network Monitor as one of the building blocks, to detect unusual…
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
Here's a very brief overview of the methods PRTG Network Monitor (https://www.paessler.com/prtg) offers for monitoring bandwidth, to help you decide which methods you´d like to investigate in more detail.  The methods are covered in more detail in o…

726 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question