Kbase P73255: What is a Firewall Proxy
| Autor |
Progress Software Corporation - Progress |
| Acesso |
Público |
| Publicação |
22/03/2004 |
|
Status: Unverified
GOAL:
What is a Firewall Proxy
FIX:
A Firewall Proxy is a request for a connection made on behalf of a host.
A firewall proxy stands between the protected and unprotected network.
Think of a quarantined area where people on the inside use a telephone to talk to people on the outside. All external connections leading into the proxy terminate at the proxy. This effectively eliminates IP routing between the networks.
The proxy repackages the messages into new packets that are allowed into the internal network. The proxy also terminates internal traffic that is headed out to the Internet and repackages it in a new packet with the source IP address of the proxy, not the internal host.
Most important, the proxy inspects and filters traffic. A predefined "rule set" is used to determine which traffic should be forwarded and which should be rejected. There are two types of proxies: application proxies and circuit proxies.