Proxy PAC Tester v.2.0

New version of Proxy PAC Tester that supports client IP address to be passed to some of the JS function that checks against client IP address.

#LoveCoding

Another .NET app I wrote to help the project to compare the performance between different web proxies

This app helps me to see the respond time that each proxy responds to a request to a particular URL address. You can specify the header, how many request do you want to perform, so that you can create the "worm" graph. It is quite fun to see this running infinitely.

The picture above shows 2 proxies being compared to hit google.com.au with IE header and 10 iteration to produce the performance graph.

Proxy PAC Tester

I wrote this .NET program to parse the PAC file and test its exception. This provides the GUI, rather than using google unsupported CLI code.

It supports direct fetch from the URL or static PAC file.

Proxy Enforcer

I developed this little utility while doing proxy migration project. This utility helps me to enforce the Windows proxy settings to IE.

You can add Proxy by clicking the "Add Proxy" button, which gives you the same configuration like Windows

Once your proxy setting is added to the list, highlight the proxy and click "Select Proxy" to enforce the selected proxy to your IE. The program will run on the TaskBar. 

Ubuntu Apt-Get Proxy

To have Ubuntu apt-get connection proxies via your proxy, do the following

sudo vi /etc/apt/apt.conf

Add the following line:

Acquire::http::Proxy "http://yourproxy.tld:port";

save and fire away

OpenVPN + VPN Gate + Squid

OK, so I need a VPN tunnel for my Internet connection at home. I don't want client-to-site VPN as it will isolate all my traffic (e.g. not only HTTP/S) to the Internet. I want only my HTTP/S traffic to go to the VPN tunnel.


So I setup Ubuntu server with OpenVPN client and Squid Proxy. This server has got 2 vNICs. One is facing the Internet and the other want is facing the internal network. The goal is to have this server establishes OpenVPN connection to VPN Gate from its primary interface and listen to the proxy connection on the secondary interface.


This way, I can use my browser to use Squid proxy and my Internet traffic is going through the VPN tunnel


Install OpenVPN client
Install OpenVPN with the following command


#> sudo apt-get install openvpn curl unzip dnsmasq-base wget


Download VPN Gate .ovpn file
Go to http://www.vpngate.net and download OpenVPN Config File. This can be TCP or UDP. Save this file to /etc/openvpn/ and change its extension from .ovpn to be .conf




Install Squid
Install Squid3 with the following command


#> sudo apt-get install squid3


Modify Squid.Conf
This modification is to set Squid to use google DNS servers for its resolution instead of using OpenVPN Client auto configuration


#> sudo vi /etc/squid3/squid.conf


find dns_nameservers and change it to:
dns_nameservers 8.8.8.8 8.8.4.4


Restart Squid
Restart Squid daemon to make the change


#> sudo service squid3 restart


Launch OpenVPN Client
Start VPN client connection to VPN Gate using the file downloaded earlier


#> sudo openvpn /etc/openvpn/vpngate.conf


The reason changing the .ovpn to .conf, is because by default if you put any file in the /etc/openvpn/ folder with .conf, it will be treated as configuration file by OpenVPN and it will launch itself every time the server is restarted


Browser Proxy
Now you can set your browser proxy to us the internal IP address of this server and port number 3128 as the proxy server and the traffic will be tunnelled to the VPN tunnel


Enjoy!

Windows Systems Wide Proxy

Sometime an application needs to be able to use a proxy to run properly. The best approach to do this is the application is able to adapt with the Internet Explorer proxy setting.

However, some applications are not 'smart' enough to get the proxy setting from the IE, therefore, a systems wide setting must be set.

Prior to Windows Vista, systems wide proxy setting is set by using: proxycfg.exe
With Windows Vista, you need to do:

netsh
netsh> winhttp
netsh winhttp> set proxy proxy.domain.tld:8080

Note: You must run this from CMD 'run as administrator'