Download Proxy-Server Based Firewalls Lecture Notes on

Computer and Network Security by Avi Kak
Lecture 19
• If the connection between the proxy server and the remote server
is successful, the proxy server forwards all the data received from
the remote server to the socks client and vice versa for the duration of the session.
• About the security of the data communication between the socks
server and the remote service provider, note that since socks
works independently of the application-level protocols, it can
easily accommodate applications that use encryption
to protect their traffic. To state a case in point, as far as
the socks server is concerned, there is no difference
between an HTTP session and an HTTPS session.
Because, after establishing a connection, a socks proxy server
doesn’t care about the nature of the data that shuttles back and
forth between the LAN client and the remote host in the internet,
such a proxy server is also referred to as a circuit-level proxy.
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