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Re: QDNS and Sonic Wall

From: Men & Mice Support
Date: Friday, January 28, 2005
Time: 11:24:04 pm

The only reason I can see why these services would be sending packets
to the firewall is for NAT reasons, if the SonicWall is NAT'ing the
source of an inbound connection.

The only reason it would be dropping such packets is if it were to
forget about a connection, either because the response was too slow
or because the SonicWall got overwhelmed.

If you're not seeing any functional problems, and you're not getting
any complaints, I wouldn't worry about it.

Chris Buxton
Men & Mice - Making DNS Easy

At 1:37 PM -0800 1/28/05, Gary Richter wrote:
>Probably off topic and a stretch that somebody might know what is
>going on...but unless I ask we will never know will we...<snicker>
>
>Latest and greatest QDNS Pro with 9.3.0 Bind with the -4 mod on an
>xserve with 10.3.7
>
>QDNS and EIMS on 216.210.202.66
>Sonic Wall TZ170 on 216.210.202.125
>
>My fire wall is reporting lines like this ever couple of minutes:
>
>01/28/2005 10:24:52.560 - UDP packet from LAN dropped -
> Source:216.210.202.66, 53, LAN -
> Destination:216.210.202.125, 1638, LAN - Port: 1638 -
>
>Notice port 53 (name service) from .66, but the port it is trying to
>get to is 1630 and that number changes by 1 every time this error
>shows up.
>
>
>follow a little less frequently but ever 5 minutes by
>Source:216.210.202.66, 25, LAN - Destination:216.210.202.125,
>2203, LAN - Port: 2203 -
>
>Notice port 25 (email) from .66 but the port it is trying to get to
>is 2203, and again it changes by 1 port number on the next error.
>
>--------
>Anybody have a clue why either QDNS using port 53 would be trying to
>talk to the sonicwall? or and totally off topic why EIMS would be
>doing the same? The thing that is odd is I have the sonicwall
>config'd to go outbound from .66 to .126 with no restrictions. .126
>is the slave QDNS install to the master on .66
>
>FYI the sonicwall has in place for a long time and have no issues
>other then these showing up.
>
>
>
>===============================================
>Gary Richter, President
> PanaVise Products, Inc.
> 7540 Colbert Dr. Reno, Nevada 89511
> Ph: 775.850.2900 Fx: 775.850.2929
> Email: grichter@panavise.com
> http://www.panavise.com
>===============================================




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