system
1
norton reported attack by avast on router’s port 80
Pondus
2
do you have Norton and avast installed?
Why Using Multiple Antivirus Programs is a Bad Idea >> https://blog.kaspersky.com/multiple-antivirus-programs-bad-idea/2670/
Eddy
3
Port 80 is the default port used for http traffic and avast is scanning that traffic (as well as on all other ports)
