From 9a9b5e274114e48f15b50e05d0133dcf3c2b7fcd Mon Sep 17 00:00:00 2001 From: claudio <> Date: Mon, 10 Sep 2018 09:10:36 +0000 Subject: [PATCH] Adjust the config to -current bgpd which makes it a lot more readable. OK phessler@ --- src/etc/examples/bgpd.conf | 60 ++++++++++++++++++++++++-------------- 1 file changed, 38 insertions(+), 22 deletions(-) diff --git a/src/etc/examples/bgpd.conf b/src/etc/examples/bgpd.conf index 63151ad7..ed825c04 100644 --- a/src/etc/examples/bgpd.conf +++ b/src/etc/examples/bgpd.conf @@ -1,4 +1,4 @@ -# $OpenBSD: bgpd.conf,v 1.13 2018/09/09 12:49:44 benno Exp $ +# $OpenBSD: bgpd.conf,v 1.14 2018/09/10 09:10:36 claudio Exp $ # example bgpd configuration file, see bgpd.conf(5) # define our own ASN as a macro @@ -14,6 +14,35 @@ prefix-set mynetworks { \ 2001:db8:abcd::/48 \ } +# define bogon prefixes which should not be part of the DFZ +prefix-set bogons { + 0.0.0.0/8 # 'this' network [RFC1122] + 10.0.0.0/8 # private space [RFC1918] + 100.64.0.0/10 # CGN Shared [RFC6598] + 127.0.0.0/8 # localhost [RFC1122] + 169.254.0.0/16 # link local [RFC3927] + 172.16.0.0/12 # private space [RFC1918] + 192.0.2.0/24 # TEST-NET-1 [RFC5737] + 192.88.99.0/24 # 6to4 anycast relay [RFC7526] + 192.168.0.0/16 # private space [RFC1918] + 198.18.0.0/15 # benchmarking [RFC2544] + 198.51.100.0/24 # TEST-NET-2 [RFC5737] + 203.0.113.0/24 # TEST-NET-3 [RFC5737] + 224.0.0.0/4 # multicast + 240.0.0.0/4 # reserved for future use + ::/8 # RFC 4291 IPv4-compatible, loopback, et al + 0100::/64 # Discard-Only [RFC6666] + 2001:2::/48 # BMWG [RFC5180] + 2001:10::/28 # ORCHID [RFC4843] + 2001:db8::/32 # docu range [RFC3849] + 2002::/16 # 6to4 anycast relay [RFC7526] + 3ffe::/16 # old 6bone + fc00::/7 # unique local unicast + fe80::/10 # link local unicast + fec0::/10 # old site local unicast + ff00::/8 # multicast +} + # Generate routes for the networks our ASN will originate. # The communities (read 'tags') are later used to match on what # is announced to EBGP neighbors @@ -85,29 +114,16 @@ allow from any inet6 prefixlen 16 - 48 # https://tools.ietf.org/html/rfc8326 match from any community GRACEFUL_SHUTDOWN set { localpref 0 } -# See http://bgpfilterguide.nlnog.net/guides/bogon_prefixes/ for -# an elaboration why each prefix is a bogon -prefix-set bogons { \ - 0.0.0.0/8 or-longer 10.0.0.0/8 or-longer \ - 100.64.0.0/10 or-longer 127.0.0.0/8 or-longer \ - 169.254.0.0/16 or-longer 172.16.0.0/12 or-longer \ - 192.0.2.0/24 or-longer 192.88.99.0/24 or-longer \ - 192.168.0.0/16 or-longer 198.18.0.0/15 or-longer \ - 198.51.100.0/24 or-longer 203.0.113.0/24 or-longer \ - 224.0.0.0/4 or-longer 240.0.0.0/4 or-longer \ - ::/8 or-longer 0100::/64 or-longer \ - 2001:2::/48 or-longer 2001:10::/28 or-longer \ - 2001:db8::/32 or-longer 2002::/16 or-longer \ - 3ffe::/16 or-longer fc00::/7 or-longer \ - fe80::/10 or-longer fec0::/10 or-longer \ - ff00::/8 or-longer \ -} -# use above prefix-set to reject the bogons -deny quick from any prefix-set bogons +# use prefix-set to reject the bogons +deny quick from any prefix-set bogons or-longer # filter bogon AS numbers -# see http://bgpfilterguide.nlnog.net/guides/bogon_asns/ for more -# information why these ASNs are bogons. +# AS_TRANS (23456) is not supposed to show up in any path and indicates a +# missconfiguration. Additionally Private or Reserved ASNs have no place in +# the public DFZ. http://www.iana.org/assignments/as-numbers/as-numbers.xhtml deny quick from any AS 23456 deny quick from any AS 64496 - 131071 deny quick from any AS 4200000000 - 4294967295 + +# filter out too long paths +deny from any max-as-len 100