Mikrotik How to block connections by ASN?

Question

Mikrotik

How to block any connections on a regular home Mikrotik whose IP addresses belong to a specific AS? e.g. AS47764. That is, you need to mark the entire AS as unreachable

Answer 1

for this you need to have a bgp session, through which you will get this information.
the only available option is to look at the list of networks belonging to this AS and put a firewall on them...

Answer 2

Under linux, you can get a list of routes like this:

whois -h whois.radb.net -- '-i origin AS47764' | grep route: