proxy server

(redirected from SSL Proxy)
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proxy server

Computing a computer that acts as an intermediary between a client machine and a server, caching information to save access time

proxy server

[′präk·sē ‚sər·vər]
(computer science)
Software for caching and filtering Web content to reduce network traffic on intranets, and for increasing security by filtering content and restricting access.

Proxy Server

(software, security)
Microsoft's proxy server and proxy gateway, designed to provide extensible firewall and network security. Proxy Server is part of BackOffice.

proxy server

(programming, World-Wide Web)
A process providing a cache of items available on other servers which are presumably slower or more expensive to access.

This term is used particularly for a World-Wide Web server which accepts URLs with a special prefix. When it receives a request for such a URL, it strips off the prefix and looks for the resulting URL in its local cache. If found, it returns the document immediately, otherwise it fetches it from the remote server, saves a copy in the cache and returns it to the requester. The cache will usually have an expiry algorithm which flushes documents according to their age, size and access history.

Compare proxy gateway.

proxy server

A proxy server is a computer system or router that functions as a relay between client and server. They help prevent an attacker from invading a private network and are one of several tools used to build a firewall.

The word proxy means "to act on behalf of another," and a proxy server acts on behalf of the user. All requests to the Internet go to the proxy server first, which evaluates the request and forwards it to the Internet. Likewise, responses come back to the proxy server and then to the user.

Proxy Servers Provide Anonymity
Like a virtual private network (VPN), a proxy server hides the user's IP address when accessing the Internet. See VPN and TLS.

Address Translation and Caching
The proxy server is a dual-homed host with two network IP addresses. The address on the outbound side is the one the Internet sees. Proxies are often used in conjunction with network address translation (NAT), which hides the users' IP addresses on the internal network. Proxy servers may also cache Web pages so that the next request for that page can be retrieved much faster. See NAT and proxy cache.

Other Proxies
Anonymous proxy servers let users surf the Web and keep their IP address private (see anonymous proxy). Although not specifically called proxies, Internet email (SMTP) and the Usenet new system (NNTP) are somewhat similar because messages are relayed from sender to recipient. See firewall.

Application Level and Circuit Level
"Application-level" proxies or "application-level gateways" are dedicated to specific content such as HTTP (Web) and FTP (file transfer). In contrast, a "circuit-level" proxy supports every application (see SOCKS).

Forward and Reverse Proxies
In this definition, the proxy servers are "forward proxies" that hide the details of the clients from the servers. However, proxies can also reside at the website to hide details from the clients (see reverse proxy).

A Proxy Server in a LAN
In this example, the proxy server resides between two routers in the "demilitarized zone." See DMZ.
References in periodicals archive ?
According to the company, Blue Coat's SSL proxy enables companies to stop malware, including viruses and spyware, from infiltrating their networks through encrypted traffic.
The new SSL proxy functionality is a licensable option of the SGOS version 4.
Using Blue Coat's SSL proxy, Hynix can gain visibility into SSL encrypted traffic between internal users and external sites.
EYE 2008 SP2 adds support for today's popular heterogeneous devices including the Cisco SSL Proxy module and client support on Microsoft[R] Windows Vista[R].
The Netronome SSL Inspector is the industry's highest-performance transparent SSL proxy.
The Netronome SSL Inspector[TM] - the industry's highest-performance transparent SSL proxy designed to provide networked security devices with access to the plaintext of SSL-encrypted communications.
The company also provides Meebo Repeater, which is an SSL proxy that is installed on the user's PC that will proxy all Meebo traffic, allowing it to bypass URL filtering rules.
Existing methods to control SSL include severely limiting its use, preventing its use entirely, or installing SSL proxy solutions that significantly reduce network performance for both SSL and non-SSL traffic.
Samsung will utilize a variety of functions of the AVS series not available through competitor products, such as SSL proxy, flash forward and dynamic caching.
11i) Authenticator support for WPA and WPA2 -- Complete Personal Mode and Enterprise Mode -- RADIUS Client -- Secure Web server, including SSL and SSL proxy
Authentication via SSL proxy ensures that a trusted source is accessing the protected network.
Our SSL proxy is now in its third year of development, and it's the only technology of this kind that has been field-tested worldwide for security, stability, and reliability.