Re: AT&T/as7018 now drops invalid prefixes from peers

Matthew Walster wrote on 12/02/2019 14:50:

For initial deployment, this can seem attractive, but remember that one of the benefits an ROA gives is specifying the maximum prefix length. This means that someone can't hijack a /23 with a /24.

they can if they forge the source ASN. RPKI helps against misconfigs rather than intentional hijackings. Nick