MD5 authentication is strongly preferred. We accept prefixes of length /24 and shorter for IPv4 and /48 or shorter for IPv6. We will discard anything longer. We use max-prefix filters for all peerings. We will discard prefixes where NEXT_HOP doesn't match the neighbor's IP address. We will discard prefixes where the first AS in the AS_PATH doesn't match the neighbor's AS. We will discard prefixes with Private AS anywhere in the AS_PATH. We will discard bogon prefixes as designated by IANA.