?
Solved

How to setup a dns server that filters web traffic

Posted on 2014-03-04
6
Medium Priority
?
355 Views
Last Modified: 2014-03-17
How is it possible to filter web traffic through a dns server.   How does opendns do it?  Are they using a product like barracuda? How does filtering get setup?
0
Comment
Question by:al4629740
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
  • 2
6 Comments
 
LVL 16

Assisted Solution

by:Shaik M. Sajid
Shaik M. Sajid earned 1000 total points
ID: 39905540
first of all DNS server will never filter any traffic ... it's function is just name to ip  and ip to name conversion...

the remaining task is the part of firewall ... which block ports etc.

now a days firewalls becomes Unified devices... which will having name specific content filtering...

for example xxx, porn... etc... which will find and blocks.

but actually a utm provider  (for example  Sonicwall/Cyberoam/Barracuda) will monitoring the internet traffic and collecting signatures over the internet  and when they found any signature which looks like virus or spam they immediately updates to its database..

this database will replicates to your Devise (UTM/Antispam) and updates Daily wise...

in the appliance the data packets received from out side it'll check these signatures and allows the data...

if any bad signature found it'll block or junk as per the policy..


thanks and regards
0
 
LVL 23

Expert Comment

by:Patrick Bogers
ID: 39905589
Hi

Not 100% what you mean by 'filter web traffic through a dns server'

If it means filtering email, you could setup MX records in DNS to pass incoming mail to a hardware spamfilter host which e.g. can use Barracuda appliances.
After filtering this service will forward you the filtered email.

If this is not what you mean please reply with more clear explaination.
0
 

Author Comment

by:al4629740
ID: 39908446
Basically how does opendns able to use dns to block or filter web traffic
0
Get MongoDB database support online, now!

At Percona’s web store you can order your MongoDB database support needs in minutes. No hassles, no fuss, just pick and click. Pay online with a credit card. Handle your MongoDB database support now!

 
LVL 23

Expert Comment

by:Patrick Bogers
ID: 39908550
It cannot.
0
 

Author Comment

by:al4629740
ID: 39909192
So then how does it get done?
0
 
LVL 23

Accepted Solution

by:
Patrick Bogers earned 1000 total points
ID: 39909208
Webcontent filtersoftware like ISA servers
0

Featured Post

Ransomware Attacks Keeping You Up at Night?

Will your organization be ransomware's next victim?  The good news is that these attacks are predicable and therefore preventable. Learn more about how you can  stop a ransomware attacks before encryption takes place with our Ransomware Prevention Kit!

Question has a verified solution.

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

This article provides a convenient collection of links to Microsoft provided Security Patches for operating systems that have reached their End of Life support cycle. Included operating systems covered by this article are Windows XP,  Windows Server…
With the rising number of cyber attacks in recent years, keeping your personal data safe has become more important than ever. The tips outlined in this article will help you keep your identitfy safe.
The viewer will learn how to look for a specific file type in a local or remote server directory using PHP.
This video Micro Tutorial shows how to password-protect PDF files with free software. Many software products can do this, such as Adobe Acrobat (but not Adobe Reader), Nuance PaperPort, and Nuance Power PDF, but they are not free products. This vide…

770 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