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Laurent GUERBY, 09/08/2012 01:47
BGP¶
Nous utilisons BIRD sous Linux comme routeur BGP
blog bgp http://www.renesys.com/blog/
flowspec http://www.slideshare.net/sfouant/an-introduction-to-bgp-flow-spec
DFZ = Default Free Zone archive http://archive.routeviews.org/
http://www.ripe.net/data-tools/stats/ris/routing-information-service
http://pch.net/resources/data/routing-tables/archive/
http://pch.net/resources/data/routing-tables/mrt-bgp-updates/
http://www.nanog.org/meetings/archive/
http://www.ipbcop.org/
IP Best Current Operational Practices Documented best practices for Engineers by Engineers
BGP best practices ANSSI
https://www.sstic.org/media/SSTIC2012/SSTIC-actes/influence_des_bonnes_pratiques_sur_les_incidents_b/SSTIC2012-Article-influence_des_bonnes_pratiques_sur_les_incidents_bgp-contat_valadon_nataf_2.pdf
Evolutions de la conf BGP¶
TODO:- mise en place d'un gestionaire de version style git au moins pour documentation
- Comment gerer les password MD5 du fichier de conf (les garder secrets tout en publiant le reste)
- Atelier ?
- Laurent GUERBY
- Solarus
- Ajouter son nom...
Alternative a MP BGP
http://tools.ietf.org/html/draft-ietf-idr-bgp-multisession-06
Add Path
http://tools.ietf.org/html/draft-ietf-idr-add-paths-07
support in bird ? http://marc.info/?l=bird-users&m=134409996129466&w=2
Liens¶
- http://www.cl.cam.ac.uk/~tgg22/talks/BGP_TUTORIAL_ICNP_2002.ppt
- http://www.menog.net/menog-meetings/menog5/presentations/smith-32bit-asn-update.pdf
- AS4 http://www.rfc-editor.org/rfc/rfc4893.txt
- bonnes pratiques incidents BGP
Configuration Toulouse¶
router id 91.224.148.2; define myas = 197422; protocol device { scan time 10; primary "eth0" 91.224.148.3; } protocol static static_bgp { import all; route 91.224.148.0/23 reject; } protocol kernel{ import all; export all; } function avoid_martians() prefix set martians; { martians = [ 169.254.0.0/16+, 172.16.0.0/12+, 192.168.0.0/16+, 10.0.0.0/8+, 224.0.0.0/4+, 240.0.0.0/4+ ]; # Avoid 0.0.0.0/X if net.ip = 0.0.0.0 then return false; # Avoid too short and too long prefixes if (net.len < 8) || (net.len > 24) then return false; # Avoid RFC1918 networks if net ~ martians then return false; return true; } filter bgp_OUT { if (net ~ [91.224.148.0/23]) then accept; else reject; } protocol bgp TOUIX { local as myas; neighbor 91.213.236.1 as 47184; preference 200; import where avoid_martians(); export filter bgp_OUT; } protocol bgp JAGUAR { local as myas; neighbor 31.172.233.1 as 30781; preference 50; import where avoid_martians(); export filter bgp_OUT; } protocol bgp TETANEUTRAL { local as myas; neighbor 91.224.148.2 as myas; preference 100; import where avoid_martians(); export all; }
Blackholing¶
Attaques¶
RFC3882¶
- http://www.ietf.org/rfc/rfc3882.txt
community AS:666 sur annonce /32 pour balckhole par AS upstream
RFC1997¶
- http://www.ietf.org/rfc/rfc1997.txt
BGP Communities Attribute
BIRD¶
Absolight¶
- communauté 29608:65001 sur /24..32 IPv4 et /41..128 IPv6 => blackhole
- test 20120703 IPv4 et IPv6, ça marche et convergence très rapide
GIXE¶
- communauté 31576:666 sur /32 => blackhole
- test 20120703 => marche pas encore, signalé et dev a faire coté GIXE pour autoriser les /32
Jaguar¶
- https://extranet.jaguar-network.com/app/public/index.php?cmd=bgp-policy
- demande 20120702 : pas de communauté blackhole actuellement, en reflexion
- déploiement de matériel arbor networks, reglage a affiner (pas de detection d'attaque)
Gitoyen¶
- demande 20120704 sur la liste, réponse 20120717
- Tata http://noc.easycolocate.nl/Teleglobe_bgp_comm.pdf
- => black-hole route (host route or shorter prefix within customerâs RIR registred assignment) 64999:0
- Ielo whois AS29075 => 29075:0 Null-route/Blackhole
- https://pad.ilico.org/p/cleanup-bgp-gitoyen
France-IX¶
- community plan : https://apps.db.ripe.net/whois/lookup/ripe/aut-num/AS51706.html
- TODO tester
Equinix-IX¶
- community plan : https://ix.equinix.com/ixp/mlpeCommunityInfo
- TODO tester
TouIX¶
- demande acces switch et route server 20120702
- TODO
Hurricane Electric¶
Sfinx¶
- http://www.renater.fr/route-servers-bgp?lang=fr
- whois AS1304 =>
remarks: 1304:65281 = Apply NO-EXPORT community
remarks: 1304:65282 = Apply NO-ADVERTISE community