Expiring Today—Celebrate National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17

x
?
Solved

Bypassing a poxy server

Posted on 2004-09-11
6
Medium Priority
?
4,078 Views
Last Modified: 2012-08-13
Hey experts,

I use the internt in my university (AUB - American University of Beirut). Of course, as a university they have around 8000 PCs, and therefore there are 4 proxy servers through which they connect to the internet. Internet Connection is broadband (and considered the best in the country), but the problem is that sometimes we need to use an application that needs to connect to the server directly (without using a proxy server) like a game or a download manager or an e-business application, and as a result we cannot connect to this application when we are using the internet inside our university. Is there a way that we can specify in the connection settings to bypass the proxy server (and thus to connect directly to our client PC).

I will provide you with the script that we use for the internet connection:

function FindProxyForURL(url, host)
{
        if (isPlainHostName(host) || dnsDomainIs(host, ".aub.edu.lb") || dnsDomainIs(host, ".intmed.aubmc.org.lb") )
            return "DIRECT";
        else if (isIpHost(host)) {
                if (isInNet(host, "192.168.0.0", "255.255.0.0") || isInNet(host, "193.188.129.0", "255.255.255.0")|| isInNet(host, "193.188.128.0", "255.255.255.0") || isInNet(host, "127.0.0.1", "255.255.255.0")) {
                        return "DIRECT";
                }
                else
                        return "PROXY proxya.aub.edu.lb:3128";
        }
        else
                        return "PROXY proxya.aub.edu.lb:3128";

}
function isIpHost(host){
        var MyQuad = host.split(".");
        if (MyQuad.length != 4){
                return false;
        }
        for (var i = 0; i < MyQuad.length; i++) {
                if (parseInt (MyQuad[i]) >= 0) {
                }
                else {
                        return false;
                }
        }
        return true;
}



P.S.: You wouldn't believe how solving this problem would help us a lot in our internet usage (we wouldn't get the "couldn't connect to server" annoying message), we would be able to use many many applications.

0
Comment
Question by:mte01
[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
  • 4
6 Comments
 
LVL 10

Accepted Solution

by:
winzig earned 1500 total points
ID: 12037897
In case that the dirrect connection to the internet is blocked, you can use http://www.http-tunnel.com/html/solutions/http_tunnel/client.asp to get full enternet acces, but the latency will be high and you will not be able play online games.
0
 
LVL 3

Author Comment

by:mte01
ID: 12038309
Ahhh! It seems that the network administrators here have blocked the site, and when I tried to search other sites to download it, they always re-direct to this site (which is blocked)...can you please upload it on some webserver, so I can install it??? That would be greatly greatly helpful.
0
 
LVL 56

Expert Comment

by:andyalder
ID: 12038331
You have already bypassed .aub.edu.lb and "193.188.128.0", "255.255.255.0", just add the other domains or subnets same as those ones. I've pasted your script (with some new lines for maintainability and the unneeded nested if...return removed) and two extra hosts added, one by name and one by address. Are you looking for an automated way to modify the script or am I missing something?


function FindProxyForURL(url, host)
{
       if (isPlainHostName(host) ||
         dnsDomainIs(host, ".games.added-entry.com") ||
         dnsDomainIs(host, ".aub.edu.lb") ||
         dnsDomainIs(host, ".intmed.aubmc.org.lb") ||  
         isInNet(host, "192.168.0.0", "255.255.0.0") ||
         isInNet(host, "193.188.129.0", "255.255.255.0")||
         isInNet(host, "193.188.128.0", "255.255.255.0") ||
         isInNet(host, "200.200.200.200", "255.255.255.255") ||
         isInNet(host, "127.0.0.1", "255.255.255.0"))
       
                       return "DIRECT";
             
         else
                       return "PROXY proxya.aub.edu.lb:3128";      
}

function isIpHost(host){
       var MyQuad = host.split(".");
       if (MyQuad.length != 4){
               return false;
       }
       for (var i = 0; i < MyQuad.length; i++) {
               if (parseInt (MyQuad[i]) >= 0) {
               }
               else {
                       return false;
               }
       }
       return true;
}
0
ATEN's HDBaseT Presentation at InfoComm 2017

Hear ATEN Product Manager YT Liang review HDBaseT technology, highlighting ATEN’s latest solutions as they relate to real-world applications during her presentation at the HDBaseT booth at InfoComm 2017.

 
LVL 3

Author Comment

by:mte01
ID: 12038430
>> or am I missing something?

Yes, and the thing you are missing is that I want to bypass the proxy server, and I want to connect actually to the Internet. In your modified script, you bypass the server (and this will fail the Internet connection). The other websites above that bypass the server (like the AUB's website) do not need a proxy server connection (for example the AUB's website is on a local domain, and has direct access)

I think the HTTP-Tunnel would solve the problem, I just need someone to put for me the http-tunnel.exe file on an external webserver, so I would be able to download it.
0
 
LVL 3

Author Comment

by:mte01
ID: 12038444
Specifically, the file that I want to download externally is:

http://www.http-tunnel.com/httptunnel_setup.exe

Thanks!
0
 
LVL 3

Author Comment

by:mte01
ID: 12040520
I guess I'll have to ask a new question for the file that I need......anyway, I think the question has been adequatley answered.
0

Featured Post

Plesk WordPress Toolkit

Plesk's WordPress Toolkit allows server administrators, resellers and customers to manage their WordPress instances, enabling a variety of development workflows for WordPress admins of all skill levels, from beginners to pros.

See why 2/3 of Plesk servers use it.

Question has a verified solution.

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

This article is a collection of issues that people face from time to time and possible solutions to those issues. I hope you enjoy reading it.
This article is in regards to the Cisco QSFP-4SFP10G-CU1M cables, which are designed to uplink/downlink 40GB ports to 10GB SFP ports. I recently experienced this and found very little configuration documentation on how these are supposed to be confi…
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…
Get a first impression of how PRTG looks and learn how it works.   This video is a short introduction to PRTG, as an initial overview or as a quick start for new PRTG users.

730 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