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Why is my DNS Server Address Constantly Changing? For BirdDog, Gwalk or Corrosive...and others, too....

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Distinguished Professor IV

Why is my DNS Server Address Constantly Changing? For BirdDog, Gwalk or Corrosive...and others, too....

I can't remember who it was that posted a month or two back about how their Glasswire app showed very few of the little warning bubbles on the graph.  Mine is full of them, and most of them are DNS address changes.  Sometimes two or three a day.  I think it may have been BirdDog that talked about this, but I wasn't sure, so I figured I'd ask the three of you knowledgeable folks, and anyone else who might know.  If I've missed anyone else just as knowledgeable, sorry.  LOL. 

Any ideas about what's going on, or how to stop it if it's a problem?  It's always changing TO 192.168.0.1.  When clicking on the "+ 2 more" box on the right, it gives two old DNS server addresses, and they are the same with every instance of changing. The two are exactly the same as what it shows the old one was, which is fec0:0:0:ffff::1, but with a 2 and 3 after them instead of a 1, i.e. fec0:0:0:ffff::2 and fec0:0:0:ffff::3.  This is a bit ridiculous, isn't it?  Or, again, is this normal?  Thanks for the help. 

BTW, this is with my desktop connected directly to the modem.  No router. 


Ryzen 5 3400G | MSI B450M Pro-M2 MAX | 16GB Corsair Vengeance DDR4 3000 | XPG SX8200 Pro 512GB NVMe | Windows 10 Pro
25 REPLIES 25
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Associate Professor

Re: Why is my DNS Server Address Constantly Changing? For BirdDog, Gwalk or Corrosive...and others, too....

Not a clue as to why that would happen...  I can guess it's due to DHCP renewal and the modem getting a new IPv6 address every now and then?  That or it's losing IPv6 connectivity and assigning just an IPv4 address for DNS... No clue to be honest.
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Moderator

Re: Why is my DNS Server Address Constantly Changing? For BirdDog, Gwalk or Corrosive...and others, too....

Oh, that is weird. I have glasswire running on the computer in the lab, I'll go see if the same thing is happening. 
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Moderator

Re: Why is my DNS Server Address Constantly Changing? For BirdDog, Gwalk or Corrosive...and others, too....

Hey Gabe

Just checked ours and I don't see anything like that. Is your DNS set to automatic on computer/router? The fec0:0:0:ffff::1/2/3 listings are link local so I think this might have something to do with your status meter? Can you check the app history on the Status Meter to see if the times match for anything the Status Meter is tracked for on GlassWire?

Amanda
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Assistant Professor

Re: Why is my DNS Server Address Constantly Changing? For BirdDog, Gwalk or Corrosive...and others, too....

What is your lease time set to on the router? I normally set it to something near the max allowed.
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New Member

Re: Why is my DNS Server Address Constantly Changing? For BirdDog, Gwalk or Corrosive...and others, too....

As I recall (it's been far to long and the details have long faded), it's probably part of IPV6 local area network discovery. When no router's in the picture it keeps trying periodically and the last digit represents a priority sequence or something like that. With a router in the picture it knows not to try unless the connection drops (again or sumpin' like that).          
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Assistant Professor

Re: Why is my DNS Server Address Constantly Changing? For BirdDog, Gwalk or Corrosive...and others, too....

Yea, IPv6 is still a bit of a strange duck to me, things about it I'm still trying to grasp.
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New Member

Re: Why is my DNS Server Address Constantly Changing? For BirdDog, Gwalk or Corrosive...and others, too....

Wouldn't be surprised to find a corresponding error or warning in the system event logs - you know, the ones where James from Microsoft Windows who sounds like he's from somewhere else, wants to show them to you as evidence that your "compootah" is infected, and will gladly clean things up for you by simply downloading his application and a small credit card fee Smiley Wink            
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Assistant Professor

Re: Why is my DNS Server Address Constantly Changing? For BirdDog, Gwalk or Corrosive...and others, too....

Oh yea, "James".....lol.
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Honorary Alumnus

Re: Why is my DNS Server Address Constantly Changing? For BirdDog, Gwalk or Corrosive...and others, too....

Here is mine:

I agree with corrosive that it is likely DHCP renewal related.

In mine above I was using my old Netgear WNR2000v.1 router. It was IPv4 only with DNS set to Google until late yesterday.

Now on the Asus 3100 and that is IPv6 compatible.