Why am I being scanned by AVAST???

See attached. You’ve been scanning me for 6 days now. I want an answer!!!

And what is telling you that avast is scanning you ?

My router. This is not the first time I’ve been scanned on and off for several weeks. I have reported this to abuse@avast.com several times. I have never received an answer.

See attached.

Most probably related to Avast HNS, nothing to worry about.

Wrong thinking! There’s no excuse for scanning me so many times. I’m also getting router logon attempts with the scans.

If you don’t need/want it, remove Avast HNS.
https://www.avast.com/faq.php?article=AVKB96#artTitle

Since I suspect a hole in Avast that someone is exploiting. I’ll do just that. Good luck!

No need to remove Avast completely, just the HNS module.

ACK scanning is one of the more unusual scan types, as it does not exactly determine whether the port is open or closed, but whether the port is filtered or unfiltered. This is especially good when attempting to probe for the existence of a firewall and its rulesets. Simple packet filtering will allow established connections (packets with the ACK bit set), whereas a more sophisticated stateful firewall might not.
The message you see in the router is perfectly harmless. Routers give only a very short/incomplete message. They don't say "Hé look, your security software has checked if everything is ok because you have told it/given permission to do so."

No problem I switched to old favorite of mine Zone Alarm. It was THE program in the 80’s and is currently making a comeback. By the way, I’ve been a network engineer for more than 30 years.

In the 80’s ZA was not the program, that was McAfee.
ZA didn’t even had a av back then.
They released their first version (branch) late 2000

You given them 2 pictures, a WHOIS report (Which in this case is useless short of tellung us who that IP Belongs to) and 2 [DoS Attack: ACK Scan].

Your title is complaining about Avast! Scanning. That’s literally what it’s supposed to do. If you don’t want it to do it’s bloody job, do not install it in the first place. Eddy has a point, ZA didn’t exist in the 80’s. In fact, upon some research, the parent company of ZA wasn’t created until 1993 (With ZA being released in 2000).

Your facts are incorrect, and relatively no details given, complaining about Avast! doing what you installed it to do. If you don’t want that function of Avast!, remove it. Simple as that. No sweat, takes 2 minutes (OK, maybe not actually, you get the point though). If you’re a Network Engineer, you SHOULD be doing custom installs anyways, which clearly you didn’t care enough to do.

Removed Avast. No more logon attacks on the router.

I’d suggest to reread our answers. Anyway, it’s your choice…

There never where logon attacks from avast to your router.

A true network engineer will know that.