DMZ firewall

ccn2012

Please any one tell me about why we use DMZ in firewall

zrockstar

Well a DMZ isn't one device specifically as far as I know. The DMZ is an area of publicly accessible hosts, usually servers for web or ftp, that is in between two firewalls.

So basically it is like this:

(INTERNET)

---

(FIREWALL)---(DMZ)---(FIREWALL)

---

(PRIVATE NETWORK)

The idea is that people have to bypass a double firewall to get into your private network, and if they do hack a host in the DMZ then there is no sensitive information on those servers, rather just web pages or files for download.

fadhil

DMZ is an area between trusted zone(local or private network) and untrusted zone (internet). the main purpose of DMZ is to provide security to private network such as being hacked by the hackers. before a traffic/packets allowed to enter or leave the private network they must pass to DMZ for checking, if they should be allowed or blocked.

JeanM

Hosts in the DMZ have limited connectivity to specific hosts in the internal network, although communication with other hosts in the DMZ and to the external network is allowed. This allows hosts in the DMZ to provide services to both the internal and external network, while an intervening firewall controls the traffic between the DMZ servers and the internal network clients

http://en.wikipedia.org/wiki/DMZ_(computing)