Go Premium for a chance to win a PS4. Enter to Win

x
?
Solved

DMZ with 1 single firewall VS 2 firewall tier

Posted on 2010-11-30
6
Medium Priority
?
1,660 Views
Last Modified: 2012-05-10
Hi,

Could someone help me out to figure this out?

There is a customer that has 1 single firewall and through the rules and interfaces has created a DMZ and then traffic from the DMZ is allowded to the inner network (other VLANs)

Can someone tell me why a 2 firewall tier will be better a better aproach for the DMZ?

Basically : 1st Firewall -> DMZ -> 2nd Firewall ---> inner network  

Thank you!
0
Comment
Question by:llarava
6 Comments
 
LVL 6

Accepted Solution

by:
malkaj01 earned 501 total points
ID: 34239680
The DMZ tier allows you to place the clients that should have the DMZ properties.

This way you can protect your network behind the second firewall.
0
 
LVL 7

Assisted Solution

by:Anglo
Anglo earned 501 total points
ID: 34239882
Both provide the DMZ functionality but the 2nd firewall increases the security of the inner network in the event of the first firewall being compromised.
0
 
LVL 17

Assisted Solution

by:StrifeJester
StrifeJester earned 498 total points
ID: 34240697
Going with the post above and maybe expanding a little.  We use a 2 firewall system here and if you can you should even try to run 2 different vendor firewalls.  This increases the security if one is compromised due to a vulnerability the other may not have that vulnerability.  Also there can be other issues with a "soft" DMZ when it comes to routing from time to time.
0
Lessons on Wi-Fi & Recommendations on KRACK

Simplicity and security can be a difficult  balance for any business to tackle. Join us on December 6th for a look at your company's biggest security gap. We will also address the most recent attack, "KRACK" and provide recommendations on how to secure your Wi-Fi network today!

 

Author Comment

by:llarava
ID: 34263691
Thanks everyone but so far I haven't seen anything that I already didn't know. Let me ask this in a different way...what is the drawback of running at single firewall for the DMZ?
0
 

Author Closing Comment

by:llarava
ID: 34277943
I was looking a better argument.
0
 
LVL 17

Expert Comment

by:StrifeJester
ID: 34282800
I know you closed but I was away all weekend and maybe this will help.  The foremost drawback was mentioned in the fact that using a single firewall increases the chances of a breach.  But it also increases load on your system.  If you have this in an environment where any device has an external IP or you have a range it is going to get hit with port scans and any other number of random events.  Keeping these on the edge will reduce the load on a interior system and can help performance.  If you have a lot in your DMZ that you access from inside the building or through VPNs and things there is a better chance of these services being more reliable since the outer firewall will filter a lot of the junk that is out there.  Hope this helps.
0

Featured Post

2017 Webroot Threat Report

MSPs: Get the facts you need to protect your clients.
The 2017 Webroot Threat Report provides a uniquely insightful global view into the analysis and discoveries made by the Webroot® Threat Intelligence Platform to provide insights on key trends and risks as seen by our users.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Considering today’s continual security threats, which affect Information technology networks and systems worldwide, it is very important to practice basic security awareness. A normal system user can secure himself or herself by following these simp…
Ransomware - Defeated! Client opened the wrong email and was attacked by Ransomware. I was able to use file recovery utilities to find shadow copies of the encrypted files and make a complete recovery.
Sending a Secure fax is easy with eFax Corporate (http://www.enterprise.efax.com). First, Just open a new email message.  In the To field, type your recipient's fax number @efaxsend.com. You can even send a secure international fax — just include t…
Email security requires an ever evolving service that stays up to date with counter-evolving threats. The Email Laundry perform Research and Development to ensure their email security service evolves faster than cyber criminals. We apply our Threat…

916 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question