Dear Experts,
I am facing a serious issue and need your help to resolve this. I am providing internet services in a small city (WISP) having 200 users. I have CIR internet service with Public IP’s (Limited 16). When I assign an Public IP to Mikrotik WAN for internet access to Mikrotik, it’s working fine for some day on user end and sometime only 2, 3 days. But after that my Public IP got blacklisted on many websites including Google and client need to do Human Verification(I’m not a Robot) to access that site (Like Google.com , Websites on Cloudflare etc). When I change this IP, problem solved for some day then again this issue happened. I think I have missed any firewall rule, so I am attaching my firewall screen shots.
Please help me to resolve this issue..
Check if your IP’s listed in spam databases, for example here
https://2ip.ru/spam/
Check if the firewall is sufficient to not be an open relay or dns resolver.
The first step is to upgrade your firmware.
- update RouterOS
- your firewall is open and wrong on input chain
- rework your firewall in style: accept only needed, drop all else
Or do “/ip firewall export” or better “/export hide-sensitive” and post here for advises (screenshot is not sufficient)