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Diffstat (limited to 'doc')
| -rw-r--r-- | doc/bird.sgml | 182 |
1 files changed, 180 insertions, 2 deletions
diff --git a/doc/bird.sgml b/doc/bird.sgml index e70232d1..a734b2ff 100644 --- a/doc/bird.sgml +++ b/doc/bird.sgml @@ -3788,8 +3788,8 @@ protocol rip [<name>] { <p>RIP defines two route attributes: <descrip> - <tag><label id="rta-rip-metric">int rip_metric/</tag> - RIP metric of the route (ranging from 0 to <cf/infinity/). When routes + <tag>int <cf/rip_metric/</tag> + RIP metric of the route (ranging from 0 to <cf/infinity/). When routes from different RIP instances are available and all of them have the same preference, BIRD prefers the route with lowest <cf/rip_metric/. When a non-RIP route is exported to RIP, the default metric is 1. @@ -3819,6 +3819,184 @@ protocol rip { } </code> +<sect>RPKI + +<sect1>Introduction + +<p>The Resource Public Key Infrastructure (RPKI) is mechanism for origin +validation of BGP routes (RFC 6480). BIRD supports only so-called RPKI-based +origin validation. There is implemented RPKI to Router (RPKI-RTR) protocol (RFC +6810). It uses some of the RPKI data to allow a router to verify that the +autonomous system announcing an IP address prefix is in fact authorized to do +so. This is not crypto checked so can be violated. But it should prevent the +vast majority of accidental hijackings on the Internet today, e.g. the famous +Pakastani accidental announcement of YouTube's address space. + +<p>The RPKI-RTR protocol receives and maintains a set of ROAs from a cache +server (also called validator). You can validate routes (RFC 6483) using +function <cf/roa_check()/ in filter and set it as import filter at the BGP +protocol. BIRD should re-validate all of affected routes after RPKI update by +RFC 6811, but we don't support it yet! You can use a BIRD's client command +<cf>reload in <m/bgp_protocol_name/</cf> for manual call of revalidation of all +routes. + +<sect1>Supported transports +<itemize> + <item>Unprotected transport over TCP uses a port 323. The cache server + and BIRD router should be on the same trusted and controlled network + for security reasons. + <item>SSHv2 encrypted transport connection uses the normal SSH port + 22. +</itemize> + +<sect1>Configuration + +<p>We currently support just one cache server per protocol. However you can +define more RPKI protocols generally. + +<code> +protocol rpki [<name>] { + roa4 { table <tab>; }; + roa6 { table <tab>; }; + remote <ip> | "<domain>" [port <num>]; + port <num>; + refresh [keep] <num>; + retry [keep] <num>; + expire [keep] <num>; + transport tcp; + transport ssh { + bird private key "</path/to/id_rsa>"; + remote public key "</path/to/known_host>"; + user "<name>"; + }; +} +</code> + +<p>Alse note that you have to specify ROA table into which will be imported +routes from a cache server. If you want to import only IPv4 prefixes you have +to specify only roa4 table. Similarly with IPv6 prefixes only. If you want to +fetch both IPv4 and even IPv6 ROAs you have to specify both types of ROA +tables. + +<sect2>RPKI protocol options + +<descrip> + <tag>remote <m/ip/ | "<m/hostname/" [port <m/num/]</tag> Specifies + a destination address of the cache server. Can be specified by an IP + address or by full domain name string. Only one cache can be specified + per protocol. This option is required. + + <tag>port <m/num/</tag> Specifies the port number. The default port + number is 323 for transport without any encryption and 22 for transport + with SSH encryption. + + <tag>refresh [keep] <m/num/</tag> Time period in seconds. Tells how + long to wait before next attempting to poll the cache using a Serial + Query or a Reset Query packet. Must be lower than 86400 seconds (one + day). Too low value can caused a false positive detection of + network connection problems. A keyword <cf/keep/ suppresses updating + this value by a cache server. + Default: 3600 seconds + + <tag>retry [keep] <m/num/</tag> Time period in seconds between a failed + Serial/Reset Query and a next attempt. Maximum allowed value is 7200 + seconds (two hours). Too low value can caused a false positive + detection of network connection problems. A keyword <cf/keep/ + suppresses updating this value by a cache server. + Default: 600 seconds + + <tag>expire [keep] <m/num/</tag> Time period in seconds. Received + records are deleted if the client was unable to successfully refresh + data for this time period. Must be in range from 600 seconds (ten + minutes) to 172800 seconds (two days). A keyword <cf/keep/ + suppresses updating this value by a cache server. + Default: 7200 seconds + + <tag>transport tcp</tag> Unprotected transport over TCP. It's a default + transport. Should be used only on secure private networks. + Default: tcp + + <tag>transport ssh { <m/SSH transport options.../ }</tag> It enables a + SSHv2 transport encryption. Cannot be combined with a TCP transport. + Default: off +</descrip> + +<sect3>SSH transport options +<descrip> + <tag>bird private key "<m>/path/to/id_rsa</m>"</tag> + A path to the BIRD's private SSH key for authentication. + It can be a <cf><m>id_rsa</m></cf> file. + + <tag>remote public key "<m>/path/to/known_host</m>"</tag> + A path to the cache's public SSH key for verification identity + of the cache server. It could be a path to <cf><m>known_host</m></cf> file. + + <tag>user "<m/name/"</tag> + A SSH user name for authentication. This option is a required. +</descrip> + +<sect1>Examples +<sect2>BGP origin validation +<p>Policy: Don't import <cf/ROA_INVALID/ routes. +<code> +roa4 table r4; +roa6 table r6; + +protocol rpki { + debug all; + + roa4 { table r4; }; + roa6 { table r6; }; + + # Please, do not use rpki-validator.realmv6.org in production + remote "rpki-validator.realmv6.org" port 8282; + + retry keep 5; + refresh keep 30; + expire 600; +} + +filter peer_in { + if (roa_check(r4, net, bgp_path.last) = ROA_INVALID || + roa_check(r6, net, bgp_path.last) = ROA_INVALID) then + { + print "Ignore invalid ROA ", net, " for ASN ", bgp_path.last; + reject; + } + accept; +} + +protocol bgp { + debug all; + local as 65000; + neighbor 192.168.2.1 as 65001; + import filter peer_in; +} +</code> + +<sect2>SSHv2 transport encryption +<code> +roa4 table r4; +roa6 table r6; + +protocol rpki { + debug all; + + roa4 { table r4; }; + roa6 { table r6; }; + + remote 127.0.0.1 port 2345; + transport ssh { + bird private key "/home/birdgeek/.ssh/id_rsa"; + remote public key "/home/birdgeek/.ssh/known_hosts"; + user "birdgeek"; + }; + + # Default interval values +} +</code> + + <sect>Static <label id="static"> |