@Yet_learningPFSense said in I want to block the IP addresses assigned by ISPs to general households.:
I have noticed some IP addresses belonging to providers in Korea and Africa (confirmed using whois, such as *.telecom) which appear somewhat suspicious to me.
Where did you notice them? The net is a noisy place - you will see noise from all over the planet hitting your wan IP.. So? They are dropped by default.
If you have some port forwards open, just allow the IPs you want to allow. For example, my plex server the only thing that can talk to it are IPs from the US, and currently Morocco (since have family currently living there).. And the list of known IPs that plex uses to validate your server is available to the public.. And the known IPs that monitor if my plex is working, and notifies me if its down.
Simple enough to do in pfblocker - because you can create lists based upon country (geoip data) or other Ips you want to allow - uptime robot and statuscake for example doing the monitoring provide lists of IPs they use.
Or did you notice your devices connecting outbound to these weird IPs? in other countries?