So tonight I discovered that Spamhaus brought back their ASN-Drop list last year.. Is anybody using it with RouterOS?
https://www.spamhaus.org/drop/asndrop.json
I’m trying to figure out the best strategy to use to use it with RouterOS, I have no idea how to create dynamic BGP filters (is that even possible to do), never mind update them with a script.
Backup plan is to use the list of ASNs, download the IP ranges for each and just add address-lists for them to use in the firewall.