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Secure Communications on the Cloud with a SOCKS Proxy

Feb 21, 2013

📄 Contents

␡

Abstract
Introduction
Prerequisites
Troubleshooting
Extended Scenario: Accessing Virtual Machines on a VLAN
Connecting Using SOCKS with Other Client Types
Next Steps

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Connecting Using SOCKS with Other Client Types

In all the examples so far, we've used Firefox as an example to connect to the SOCKS proxy. This is because Firefox has a simple option to act as a SOCKS client.

Some software applications also have options to connect as a SOCKS client. For example, Java supports this using the socksProxyHost system property:

$ java -DsocksProxyHost=<SOCKS proxy> <MainClass>

For applications that don't support SOCKS directly, you can use a proxifier—a program that will intercept TCP packets and route them through a proxy. Examples of proxifiers include the open source ProxyChains and various commercial products.

ProxyChains is a Linux utility that can intercept TCP packets from a software application and redirect them through a SOCKS proxy, even if the application doesn't support SOCKS directly. On RHEL, install ProxyChains with the following command:

$ sudo yum install proxychains

On SUSE and Ubuntu, install ProxyChains with this command:

$ sudo apt-get install proxychains

Edit the file /etc/proxychains.conf to set the IP address and port for your SOCKS proxy. To use it, enter this command:

$ sudo proxychains <application_name>

where <application_name> is the command for the application that you hope to use.

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