• Contenu
• BGP
• Evolutions de la conf BGP
• Liens
• Configuration Toulouse
• Blackholing

BGP¶

Nous utilisons BIRD sous Linux comme routeur BGP

http://bird.network.cz/

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/

Evolutions de la conf BGP¶

• http://lists.tetaneutral.net/pipermail/technique/2011-December/000118.html

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

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
  • https://www.sstic.org/media/SSTIC2012/SSTIC-actes/influence_des_bonnes_pratiques_sur_les_incidents_b/SSTIC2012-Slides-influence_des_bonnes_pratiques_sur_les_incidents_bgp-contat_valadon_nataf.pdf

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¶

Avec BIRD :

http://www.mail-archive.com/bird-users@atrey.karlin.mff.cuni.cz/msg01998.html

RFC3882 http://www.ietf.org/rfc/rfc3882.txt
community AS:666