Proxy

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CNSSI 4009

Software agent that performs a function or operation on behalf of another application or system while hiding the details involved.

NIST SP 800-44

A proxy is an application that "breaks" the connection between client and server. The proxy accepts certain types of traffic entering or leaving a network and processes it and forwards it. This effectively closes the straight path between the internal and external networks. Making it more difficult for an attacker to obtain internal addresses and other details of the organization's internal network. Proxy servers are available for common Internet services; for example, an Hyper Text Transfer Protocol (HTTP) proxy used for Web access, and an Simple Mail Transfer Protocol (SMTP) proxy used for e-mail.

NIST SP 800-44v2

A proxy is an application that "breaks" the connection between client and server. The proxy accepts certain types of traffic entering or leaving a network, processes it, and forwards it. This effectively closes the straight path between the internal and external networks, making it more difficult for an attacker to obtain internal addresses and other details of the organization's internal network. Proxy servers are available for common Internet services; for example, a Hypertext Transfer Protocol (HTTP) proxy used for Web access and a Simple Mail Transfer Protocol (SMTP) proxy used for e-mail.

NIST SP 800-83

A program that receives a request from a client, and then sends a request on the client's behalf to the desired destination.

NIST SP 800-86

Software that receives a request from a client, then sends a request on the client's behalf to the desired destination.

NIST SP 800-95

An agent that acts on behalf of a requester to relay a message between a requester agent and a provider agent. The proxy appears to the provider agent Web service to be the requester. (Web Services Glossary - W3C Working Group Note 11 February 2004, http://www.w3.org/TR/2004/NOTE-ws-gloss-20040211)