original: an open proxy is a proxy server that is accessible by any internet user .
simplifications: an open proxy is one that is available to any internet user . an open proxy is a proxy server that is accessible by any internet user . an open proxy is a server accessible by any internet user . an open proxy is a proxy server that is accessible by any internet user . an open proxy is a proxy server that is accessible by any internet user . an open proxy is a proxy server that is accessible by an internet user . an open proxy is a proxy server that any internet user can connect to . internet users often use an open proxy server which is easily accessible but vulnerable too .