DNS poisoning

Viruses and worms
1

Hello everyone. I have a DNS poisoning issue and had a couple of questions. My main computer, family computer, is running Avast Internet security and I have a spare laptop that I use to test software and various things. On my spare laptop, with a different AV, I keep getting a warning through the firewall about a DNS poisoning detected. My questions are, is this specific to just this computer or does it affect both CPU’s? If it affects both, since I have a wireless router, Avast never reports this problem on my main CPU.

Next, how do I get rid of it? I flushed the DNS cache on the spare laptop and scanned with malwarebytes, it found nothing, and it keeps coming back. My main concern is possibly Avast not detected it, but any help fixing the other would be appreciated. Thanks.

2

Hi baba booey,

Do the test here: http://n1.netalyzr.icsi.berkeley.edu/
Run the Netalyzr and get an idea of your connectivity,
and do the spoofability test here:
https://www.grc.com/dns/dns.htm

polonus

3

Thanks for the links polonus. Everything checked out fine on both CPU’s. The IP address the warning gives me during the pop up seems to my local IP hub. I assume that is normal. Thanks.

4

Hi baba booey,

You’re welcome, glad we could help. Nice to hear all is as it should be,

polonus