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bird.conf
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bird.conf
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# take from https://bgpfilterguide.nlnog.net
# bogon ASNs
define BOGON_ASNS = [
0, # RFC 7607
23456, # RFC 4893 AS_TRANS
64496..64511, # RFC 5398 and documentation/example ASNs
64512..65534, # RFC 6996 Private ASNs
65535, # RFC 7300 Last 16 bit ASN
65536..65551, # RFC 5398 and documentation/example ASNs
65552..131071, # RFC IANA reserved ASNs
4200000000..4294967294, # RFC 6996 Private ASNs
4294967295 ]; # RFC 7300 Last 32 bit ASN
function reject_bogon_asns()
int set bogon_asns;
{
bogon_asns = BOGON_ASNS;
if ( bgp_path ~ bogon_asns ) then {
reject;
}
}
# bogon prefixes
define BOGON_PREFIXES = [
#0.0.0.0/8+, # RFC 1122 'this' network
10.0.0.0/8+, # RFC 1918 private space
100.64.0.0/10+, # RFC 6598 Carrier grade nat space
127.0.0.0/8+, # RFC 1122 localhost
169.254.0.0/16+, # RFC 3927 link local
172.16.0.0/12+, # RFC 1918 private space
192.0.2.0/24+, # RFC 5737 TEST-NET-1
192.88.99.0/24+, # RFC 7526 6to4 anycast relay
192.168.0.0/16+, # RFC 1918 private space
198.18.0.0/15+, # RFC 2544 benchmarking
198.51.100.0/24+, # RFC 5737 TEST-NET-2
203.0.113.0/24+, # RFC 5737 TEST-NET-3
224.0.0.0/4+, # multicast
240.0.0.0/4+ ]; # reserved
function reject_bogon_prefixes()
prefix set bogon_prefixes;
{
bogon_prefixes = BOGON_PREFIXES;
if (net ~ bogon_prefixes) then {
reject;
}
}
# small prefixes
function reject_small_prefixes()
{
if (net.len > 24) then {
print "Reject: Too small prefix: ", net, " ", bgp_path;
reject;
}
}
# long as paths
function reject_long_aspaths()
{
if ( bgp_path.len > 100 ) then {
print "Reject: Too long AS path: ", net, " ", bgp_path;
reject;
}
}
# known transit AS
define TRANSIT_ASNS = [ 174, # Cogent
701, # UUNET
1299, # Telia
2914, # NTT Ltd.
3257, # GTT Backbone
3320, # Deutsche Telekom AG (DTAG)
3356, # Level3
3491, # PCCW
4134, # Chinanet
5511, # Orange opentransit
6453, # Tata Communications
6461, # Zayo Bandwidth
6762, # Seabone / Telecom Italia
6830, # Liberty Global
7018 ]; # AT&T
function reject_transit_paths()
int set transit_asns;
{
transit_asns = TRANSIT_ASNS;
if (bgp_path ~ transit_asns) then {
#print "Reject: Transit ASNs found on IXP: ", net, " ", bgp_path;
reject;
}
}
filter transit {
#reject_invalids(); #rpki not implemented yet for testing in bgperf
reject_bogon_prefixes();
reject_bogon_asns();
#reject_long_aspaths(); # don't have an equivilent for frr
#reject_small_prefixes();
accept;
}
filter ixp {
# reject_invalids();#rpki not implemented yet for testing in bgperf
reject_bogon_prefixes();
reject_bogon_asns();
#reject_long_aspaths(); # don't have an equivilent for frr
reject_transit_paths();
reject_small_prefixes();
accept;
}