Did you know LQ has a Linux Hardware Compatibility List?
Go Back > Forums > Linux Forums > Linux - Networking
User Name
Linux - Networking This forum is for any issue related to networks or networking.
Routing, network cards, OSI, etc. Anything is fair game.


  Search this Thread
Old 01-01-2006, 03:00 PM   #1
LQ Newbie
Registered: Jul 2005
Posts: 2

Rep: Reputation: 0
DMZ and designed network segment

Hello, Happy New 2006 Year!

First, what exactly means DMZ? I already know, it's demilitarized zone, but may anyone tell me, when we use that? What exactly is it's task? What does it do?

What should I understand under "designed network segment"? I have done some google searches, but haven't found anything concrete.

thanks in advance.
Old 01-01-2006, 03:57 PM   #2
Registered: Feb 2002
Location: Grenoble
Distribution: Debian
Posts: 9,545

Rep: Reputation: 160Reputation: 160

Together they should give the picture. In short, you use DMZ if you want to separate your servers from your internal network.

'Designed network segment'... What's the context? Without it, I'd think it's just about a network segment that had a project of some kind.
Old 01-01-2006, 04:10 PM   #3
LQ Guru
Registered: Jan 2003
Location: Seymour, Indiana
Distribution: Distribution: RHEL 5 with Pieces of this and that. Kernel, KDE 3.5.8 and KDE 4.0 beta, Plu
Posts: 5,700

Rep: Reputation: 61
Here is a very broad explantion. The normally is to have a router with 3 nics in it. First nic connects to the internet. second can connacet to internal lan machines and the third will be machine on the dmz circuit. Normally these are server machines that will be seen from the outside internet as machines on the first nic. The dmz is less secure because you allow open ports from the internet to it. On the lan side you very seldom have any open ports (normally never open any ports) to make information as secure as possible on this side.

designed network segments if I understand is usually used in large businesses. They create subnets of class A,B,or C address and divide them into smaller subnets. Look up subnetting for more info. So in a class C address of and using the subnet to define it as a class C you have use of 255 IP from to

Now if divide a class C into smaller segemnts we use with a subnet or same as You will have total of 30 ip's to work with from to and use of as broadcast. For the next segment you would use which gets you to with as broadcast. Even though both may be on the same network it requires a routing table to allow packets to and from each segment. One seldom divides a class C unless segmenting users from seeing each other.

Items to help in search. iptables, subnetting, firewall, routing, gateway.

lan    dmz

Hope this helps out.


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
2 subnets on the same network segment robadawb Linux - Networking 5 11-16-2005 03:42 PM
Changing network segment of a Windows network eantoranz Linux - Networking 3 10-18-2005 09:58 AM
Network DMZ question svinka SUSE / openSUSE 0 08-25-2005 04:50 PM
Can't access other network segment extremebfn Linux - Networking 2 09-03-2004 02:04 AM
Network with firewall and DMZ justwantin Linux - Networking 11 05-06-2004 04:07 AM

All times are GMT -5. The time now is 01:42 PM.

Main Menu
Write for LQ is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration