Solved

Best practice for setting up DNS on Sonicwall

Posted on 2014-11-09
4
541 Views
Last Modified: 2015-06-23
Hello Experts!

We have a few scenarios where I need to understand what the best practices should be for DNS at the firewall level.

Scenario 1: Windows server environments where SonicWALL doesn't handle DHCP or DNS, but rather Windows Server does. What should the DNS settings point to: a) the Windows DNS servers or b) Public DNS servers (ISP, etc.).

Scenario 2: Windows server doesn't exist or at least is not handling DHCP/DNS in the environment and SonicWALL is handling both DHCP or DNS. I'd assume DNS should be point to Public DNS servers (ISP, etc.).

Thanks!
0
Comment
Question by:Peter Wilson
  • 2
  • 2
4 Comments
 
LVL 25

Accepted Solution

by:
Diverse IT earned 500 total points
ID: 40431385
Hi Peter Wilson,

As a general rule, If Windows Servers are present at least one should be handling DHCP and DNS.

As a best practice for firewalls, specifically SonicWALL, irrespective of having Windows Servers in the environment or not you should have the SonicWALL's DNS point to the Public DNS servers whether that be the DNS provided by your ISP, 4-8's or OpenDNS, etc.

The primary reason for this is because the backend of SonicWALL security services uses it's internal DNS server to perform functions like licensing synchronization (mysonicwall.com), cloud security services (CFS, AppControl, Geo-IP, Botnet, etc.), CFS lookups, validations, and a number of various security service functions. In short it also reduces hops for these types of functions.

Hope that helps. Let me know if you have any other questions!
0
 
LVL 2

Author Comment

by:Peter Wilson
ID: 40431392
so no matter what I should be setting up the DNS to point to public ones? What about for site to site vpn traffic where there are two windows servers running DHCP?
0
 
LVL 25

Expert Comment

by:Diverse IT
ID: 40431393
Yes, if Windows is handing out DHCP is should be handing out DNS as well.
0
 
LVL 2

Author Closing Comment

by:Peter Wilson
ID: 40432895
Great. Thanks! Your detailed response and  thorough knowledge was warmly welcomed.
0

Featured Post

Superior storage. Superior surveillance.

WD Purple drives are built for 24/7, always-on, high-definition security systems. With support for up to 8 hard drives and 32 cameras, WD Purple drives are optimized for surveillance.

Question has a verified solution.

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

Outsource Your Fax Infrastructure to the Cloud (And come out looking like an IT Hero!) Relative to the many demands on today’s IT teams, spending capital, time and resources to maintain physical fax servers and infrastructure is not a high priority.
Use of TCL script on Cisco devices:  - create file and merge it with running configuration to apply configuration changes
Here's a very brief overview of the methods PRTG Network Monitor (https://www.paessler.com/prtg) offers for monitoring bandwidth, to help you decide which methods you´d like to investigate in more detail.  The methods are covered in more detail in o…
In this tutorial you'll learn about bandwidth monitoring with flows and packet sniffing with our network monitoring solution PRTG Network Monitor (https://www.paessler.com/prtg). If you're interested in additional methods for monitoring bandwidt…

920 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

Need Help in Real-Time?

Connect with top rated Experts

18 Experts available now in Live!

Get 1:1 Help Now