Bogon Bit Notation List
Be sure to check out the main Bogon Reference for more information on the project and terminology used, and why it is important to keep your bogon filters up-to-date.
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​With regards to filtering 100.64.0.0/10, please consult RFC6598. Know your network, test your filters!
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[ Bit Notation Non-aggregated ] [ Bit Notation Aggregated ] [ Juniper prefix-list Non-aggregated ] [ Juniper prefix-list Aggregated ]
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CURRENT AS OF: AUGUST 2018
Bit Notation Non-Aggregated
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
192.0.0.0/24
192.0.2.0/24
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
Bit Notation Aggregated
If proper boundaries are not followed it is possible to further aggregate, though this likely won’t work on most gear.
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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
192.0.0.0/24
192.0.2.0/24
192.168.0.0/16
198.18.0.0/15
198.51.100.0/24
203.0.113.0/24
224.0.0.0/3
Juniper Prefix-List Non-Aggregated
policy-options {
prefix-list bogons {
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;
192.0.0.0/24;
192.0.2.0/24;
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;
}
}
Juniper Prefix-List Aggregated
The following aggregations work with Cisco ACLs, and are aligned on proper boundaries.
​
policy-options {
prefix-list bogons {
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;
192.0.0.0/24;
192.0.2.0/24;
192.168.0.0/16;
198.18.0.0/15;
198.51.100.0/24;
203.0.113.0/24;
224.0.0.0/3;
}
}