[itdiscuss] DNS Issue

[Rob Shaw]

Just an FYI on your new SonicWall (we found out the hard way): You can not
have a mix of zones on the SonicWall with some relaying IP requests and
others being server (as a DHCP) server by the SonicWall.  This is good to
know if you intend on putting wireless AP on it in a different zone.  It is
unfortunately an all or nothing; either all zones get served IP addresses or
all relay requests for DHCP.

Doesn¹t sound like this is what you have dealt with here, but it is
something that took us a LONG time to figure out.  Our previous, ³less
capable² Fortigate did this without an issue.  :-(

-- 


 




From: Ray Tyner <ray.tyner at ptcumc.org>
Reply-To: IT Discussion Forum <discuss at itdiscuss.org>
Date: Fri, 28 Aug 2009 14:02:41 -0400
To: IT Discussion Forum <discuss at itdiscuss.org>
Subject: Re: [itdiscuss] DNS Issue

Got it.  My new SonicWall had DHCP turned on.  Problem resolved.  Thnx
 

Ray Tyner
Peachtree City UMC
678.642.3362


From: discuss-bounces at itdiscuss.org [mailto:discuss-bounces at itdiscuss.org]
On Behalf Of Kevin Brunson
Sent: Friday, August 28, 2009 12:34 PM
To: 'IT Discussion Forum'
Subject: Re: [itdiscuss] DNS Issue
 
In ipconfig /all, are they showing the correct DHCP server?
 
I have seen in the past where somehow or other a firewall, wireless router,
etc either gets added to the network by a well-intentioned but poorly
informed user, or somehow modified or goes back to a factory default setting
with DHCP server turned on.  Sometimes the workstation determines that it is
getting DHCP from a bad source, so it goes back to get an IP from the
authorized DHCP server but it doesn¹t update the DNS server list with the
info from the authorized DHCP server.  You end up with a working IP address,
but bad DNS servers.
 
Kevin Brunson
Senior Systems Engineer
Higher Ground Technologies
http://www.highergroundtech.com
 

From: discuss-bounces at itdiscuss.org [mailto:discuss-bounces at itdiscuss.org]
On Behalf Of Ray Tyner
Sent: Friday, August 28, 2009 11:22 AM
To: IT Discussion Forum
Subject: [itdiscuss] DNS Issue
 
On Monday afternoon a number of my DHCP clients started losing their
connection to the servers on our second campus.  We have a mapped ³I² drive
for a shared resource on our Windgate campus.  The first computer I checked
would not map the ³I² drive when the user logged into the domain.  She was
unable to even browse to the server shares.  I ran IPCONFIG and found that
the ip addresses for our internal DNS servers had been replaced by the ip
addresses of our external servers provided by out ISP.   This was the
situation on every problem client but not everyone has been affected.  I
have a workaround but am more interested in finding the reason for problem
as well as a permanent solution. We have been using this configuration since
January 2003.
 

Ray Tyner
Peachtree City UMC
678.642.3362


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