===== reject_bogon_asns =====
<code>
policy-options {
    as-path-group bogon-asns {
        /* RFC7607 */
        as-path zero ".* 0 .*";
        /* RFC 4893 AS_TRANS */
        as-path as_trans ".* 23456 .*";
        /* RFC 5398 and documentation/example ASNs */
        as-path examples1 ".* [64496-64511] .*";
        as-path examples2 ".* [65536-65551] .*";
        /* RFC 6996 Private ASNs*/
        as-path reserved1 ".* [64512-65534] .*";
        as-path reserved2 ".* [4200000000-4294967294] .*";
        /* RFC 6996 Last 16 and 32 bit ASNs */
        as-path last16 ".* 65535 .*";
        as-path last32 ".* 4294967295 .*";
        /* RFC IANA reserved ASNs*/
        as-path iana-reserved ".* [65552-131071] .*";
    }
    policy-statement import_from_ebgp {
        term bogon-asns {
            from as-path-group bogon-asns;
            then reject;
        }
        term .....
    }
}
</code>
===== reject_bogon_prefixes =====
<code>whois -h whois.radb.net fltr-martian</code>
<code>
policy-options {
    prefix-list BOGONS_v4 {
        0.0.0.0/8;
        10.0.0.0/8;
        100.64.0.0/10;
        127.0.0.0/8;
        169.254.0.0/16;
        172.16.0.0/12;
        192.0.2.0/24;
        192.88.99.0/24;
        192.168.0.0/16;
        198.18.0.0/15;
        198.51.100.0/24;
        203.0.113.0/24;
        224.0.0.0/4;
        240.0.0.0/4;
    }
    policy-statement BGP_FILTER_IN {
        term IPv4 {
            from {
                prefix-list BOGONS_v4;
            }
            then reject;
        }
    }
}
</code>

===== reject_transit_paths =====
<code>
policy-options {
  policy-statement bgp-import-policy {
    term no-transit-leaks {
        from as-path no-transit-import-in;
        then reject;
    }
   }
 }

 as-path no-transit-import-in ".* (174|209|701|702|1239|1299|2914|3257|3320|3356|3549|3561|4134|5511|6453|6461|6762|7018) .*";
</code>
===== reject_small_prefixes =====
<code>
policy-options {
  policy-statement bgp-import-policy {
    term reject_too_small_prefixes_v4 {
        from {
            route-filter 0.0.0.0/0 prefix-length-range /25-/32;
        }
        then {
            reject;
        }
    }
  }
}
</code>