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What is a SOCKS proxy server?

When an application client needs to connect to an application server, the client connects to a SOCKS proxy server. The proxy server connects to the application server on behalf of the client, and relays data between the client and the application server. For the application server, the proxy server is the client. There are two versions of the SOCKS protocol - SOCKSv4 and SOCKSv5, respectively. The SOCKSv4 protocol performs three functions: a) makes connection requests; b) sets up proxy circuits c) relays application data. The SOCKSv5 protocol adds authentication to the above functions.

See on the Internet: Socks Terminology

You need to contact your ISP/Web Hosting Service via the web or email and ask them to send your SOCKS connection information. This includes the SOCKS Proxy type, SOCKS Proxy Address, your Username, and your Password.
A firewall/proxy can be used to protect unauthorized access to the network. Firewalls/proxies are often used by companies that have a medium to large computer network connected to the Internet. If you connect to the Internet through a firewall then you should configure the SOCKS firewall-proxy settings. Enter the configuration information applicable to your firewall (ask your Network Administrator if you are unsure). Your firewall may or may not require the User ID and Password to be entered. Use SOCKS proxy for FTP connections when searching for orphaned files. If HTTP (web browser) data must also be sent through the SOCKS firewall then you should select Use SOCKS for HTTP.

If you are having difficulty performing scans through your firewall double check that the settings are correct. Try using the minimum number of options: Use SOCKS firewall/proxy, set the SOCKS version (4, 4A or 5), Address and Port. Try the other SOCKS versions, and also try with and without the User ID and/or Password. The Port is normally 1080 but may be different in your network.

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