| About | Products | News | Press | Resources | Awards | Jobs | Contact

SecPoint® - anti-spam appliance, web filter, vulnerability scanning, wifi security

What is a Proxy Server?

A proxy server, also known as a "proxy" or "application level gateway", is a computer that acts as a gateway between a local network (e.g., all the computers at one company or in one building) and a larger-scale network such as the Internet. Proxy servers provide increased performance and security. In some cases, they monitor employees' use of outside resources.

A proxy server works by intercepting connections between sender and receiver. All incoming data enters through one port and is forwarded to the rest of the network via another port. By blocking direct access between two networks, proxy servers make it much more difficult for hackers to get internal addresses and details of a private network.

Some proxy servers are a group of applications or servers that block common Internet services. For example, an HTTP proxy intercepts web access, and an SMTP proxy intercepts email. A proxy server uses a network addressing scheme to present one organization-wide IP address to the Internet. The server funnels all user requests to the Internet and returns responses to the appropriate users. In addition to restricting access from outside, this mechanism can prevent inside users from reaching specific Internet resources (e.g., certain web sites). A proxy server can also be one of the components of a firewall.

Proxies may also cache web pages. Each time an internal user requests a URL from outside, a temporary copy is stored locally. The next time an internal user requests the same URL, the proxy can serve the local copy instead of retrieving the original across the network, improving performance.

The SecPoint® Protector (http://www.secpoint.com/secpoint-protector.html) includes this feature for the customer to use to speed up web traffic and allow web filtering.

 

For further information, see:

http://www.techweb.com/encyclopedia/

http://www2.rad.com/networks/1998/proxy/proxy.htm

http://www.cetpa-k12.org/pub/v36n1.pdf

SecPoint® - What is a Proxy Server? - Appliance vs Software
SecPoint® - What is a Proxy Server? - What is Cross Site Scripting(XSS)?
SecPoint® - What is a Proxy Server? - What is SQL Injection?
SecPoint® - What is a Proxy Server? - What is a Routing Table?
SecPoint® - What is a Proxy Server? - What is High Availability?
SecPoint® - What is a Proxy Server? - What is Grey Listing?
SecPoint® - What is a Proxy Server? - What is a Web Filter?
SecPoint® - What is a Proxy Server? - What is a Vulnerability?
SecPoint® - What is a Proxy Server? - What is a Proxy Server?
SecPoint® - What is a Proxy Server? - What is a Firewall?
SecPoint® - What is a Proxy Server? - What is a Cookie?
SecPoint® - What is a Proxy Server? - What is a Bayesian Filter?
SecPoint® - What is a Proxy Server? - Test Your Security Policy
SecPoint® - What is a Proxy Server? - Email & Spam Test Links
SecPoint® - What is a Proxy Server? - What is RoHS Weee?
SecPoint® - What is a Proxy Server? - What is Vulnerability Scanning?
SecPoint® - What is a Proxy Server? - What is Vulnerability Assessment?
SecPoint® - What is a Proxy Server? - What is Penetration Testing?
SecPoint® - What is a Proxy Server? - What is a Security Exploit?
SecPoint® - What is a Proxy Server? - What is Appliance Scanning?
SecPoint® - What is a Proxy Server? - What is Zero Day?
SecPoint® - What is a Proxy Server? - What is Unified Threat Management?
SecPoint® - What is a Proxy Server? - What is Intrusion Prevention?
SecPoint® - What is a Proxy Server? - What is a Content-Filter?
SecPoint® - What is a Proxy Server? - What is VoIP
SecPoint® - What is a Proxy Server? - What is Virus?
SecPoint® - What is a Proxy Server? - What is Spyware?
SecPoint® - What is a Proxy Server? - What is Phishing?
SecPoint® - What is a Proxy Server? - What is P2P?
SecPoint® - What is a Proxy Server? - What is Instant Messaging?
SecPoint® - What is a Proxy Server? - What is Spam?
SecPoint® - What is a Proxy Server? - White Papers
SecPoint® - What is a Proxy Server? - Technology Papers

© Copyright 1999-2008: SecPoint®
SecPoint ApS - Lergravsvej 53 - 2300 Copenhagen S - Phone +45 70 235 245
Privacy Statement | Link Policy | User Policy | SecPoint® Blog | SecPoint® Picture Archive |

Anti-Spam Appliance - Anti-Spam Firewall - Unified Threat Management Appliance
Anti-Virus - Web Filter Appliance - Anti Spam Appliance - Anti Spam Firewall - UTM Appliance

Wifi Security - Wifi Pen Test - Wifi Crack - Wifi Hack - Wifi Audit - Wep Wpa2 Crack

Vulnerability Scanner - Vulnerability Assessment - Security Scanner - Pen Test Appliance