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  ProxyCap has a large variety of uses. Here are the most common ones:
Circuit-level SOCKS client
SSH-based VPN Client
Circumvention tool
Anonymity tool
Internet connection sharing software
   
  Circuit-level SOCKS client
   
  A circuit-level gateway is typically located on the Internet gateway of a private network and relays TCP connections and, in the case of SOCKS5, UDP datagrams.

The de-facto standard for circuit-level gateways is the SOCKS protocol. Circuit-level SOCKS proxies have many advantages for businesses and other organisations:
  • Provide simple yet effective security model.
  • More secure than packet filters since operate on higher level.
  • Operation is very transparent compared to application-level firewalls.
  • Cost effective.
  • Hide internal network topology from the external world.
The main complication with SOCKS proxies is that applications must be "socksified" in order to communicate with the SOCKS proxy server. This is when ProxyCap comes in use.
   
  SSH-based VPN Client
   
 
Employing a SSH server as the VPN server-end provides some important advantages compared to the commercial VPN solutions:
  • Open standard protocol.
  • Cost effectiveness (free OpenSSH server is available on virtually any Unix system).
  • Relative ease of configuration.
ProxyCap lets you tunnel applications through a SSH server transparently, without the need to run a SSH client or to reconfigure your applications. ProxyCap uses state of the art encryption techniques for all data transmitted between your computer and the SSH server. Our SSH code is optimized for speed. Our tests show that ProxyCap is not slower than any of the existing SSH clients.
   
  Circumvention tool
   
  Using a proxy is often the easiest way to bypass Internet filtering to access otherwise blocked content.

Present-day Internet filtering software, also known as "censorware", uses the following techniques to block censored content: IP address blacklists, URL filtering, content (keyword) filtering, DNS name blacklists. All these methods can be successfully bypassed by using ProxyCap. Using the SSH protocol is recommended since it is encrypted and harder to block. In order to circumvent DNS filtering, enable remote name resolution for the proxy server.
   
  Anonymity tool
   
  The key piece of personally-identifiable information that we scatter across the Internet is our IP addresses. The simplest method to hide your IP address from other computers you communicate with on the Internet is to use a proxy server.

To achieve a higher level of anonymity and privacy, consider using ProxyCap in combination with anonymizer software such as Tor.
   
  Internet connection sharing software
   
  ProxyCap in combination with proxy server software can be used to set up Internet connection sharing for a private network in a manner similar to that of NAT-enabled routers.

In this scenario, the proxy server typically runs on a dual-homed machine on the Internet gateway of the private network.
   
   
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