topic Re: Malicious DNS address in Network Security

Malicious DNS address

ITShore — Wed, 07 Jul 2021 01:35:40 GMT

Hi Buddies,

Could help me figure out what is the meaning of these logs in my router?

I'm worried that this could harm my network.

Thanks.

Re: Malicious DNS address

Marvin Rhoads — Wed, 07 Jul 2021 07:33:31 GMT

What makes you think they are malicious? Log messages like that are normally indicators that a session through a router (especially a CUBE router doing SIP trunking) required a DNS lookup.

https://www.cisco.com/c/en/us/support/docs/unified-communications/unified-border-element/214644-configure-and-troubleshoot-dns-lookup-on.html

Re: Malicious DNS address

ITShore — Thu, 08 Jul 2021 00:17:22 GMT

Hi Marvin,

Because of the doubt, I tried to check on the internet what was the meaning of the log message until I found one that gives me an idea to suspect that it was a malicious one.
But, since you gave me a good answer, it's now clear that the log message has nothing to do with cyber attacks.

Thanks, Marvin.