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AS information available via DNS
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Tony Bates
Tony.Bates at ripe.net
Wed May 5 16:35:24 CEST 1993
Folks, As one of the actions from the last RIPE meeting we have been thinking about a nice way to have an automatic update procedure based on DNS. As a trial for this an auto-script has been been produced that loads current AS derived data into zonefiles under the domain aut-num.ripe.net. This has two very nice features straight away. It allows you to see a list of networks associated with an AS. For example... [mature-tony-1480] host -lt txt as1104.aut-num.ripe.net AS1104.aut-num.ripe.net TXT 192.16.185.0 AS1104.aut-num.ripe.net TXT 192.16.186.0 AS1104.aut-num.ripe.net TXT 192.16.194.0 AS1104.aut-num.ripe.net TXT 192.16.195.0 AS1104.aut-num.ripe.net TXT 192.16.199.0 AS1104.aut-num.ripe.net TXT 192.87.45.0 I currently use TXT records for the zonefiles (suggestions are welcome if something else is more appropriate ?). Also, you can do more interesting things like perhaps generate access-lists.. For Example... [mature-tony-1482] host -lt txt as1104.aut-num.ripe.net | awk '{ printf ("acces s-list 30 permit %s\n", $3)}' access-list 30 permit 192.16.185.0 access-list 30 permit 192.16.186.0 access-list 30 permit 192.16.194.0 access-list 30 permit 192.16.195.0 access-list 30 permit 192.16.199.0 access-list 30 permit 192.87.45.0 and so on. You can also see what ASes are currently in the RIPE database. host -lt ns aut-num.ripe.net aut-num.ripe.net NS mature.ripe.net AS760.aut-num.ripe.net NS mature.ripe.net AS766.aut-num.ripe.net NS mature.ripe.net AS590.aut-num.ripe.net NS mature.ripe.net NONE-LOCAL.aut-num.ripe.net NS mature.ripe.net AS1717.aut-num.ripe.net NS mature.ripe.net AS2107.aut-num.ripe.net NS mature.ripe.net AS2108.aut-num.ripe.net NS mature.ripe.net AS2111.aut-num.ripe.net NS mature.ripe.net AS1205.aut-num.ripe.net NS mature.ripe.net AS786.aut-num.ripe.net NS mature.ripe.net AS2116.aut-num.ripe.net NS mature.ripe.net AS789.aut-num.ripe.net NS mature.ripe.net AS1213.aut-num.ripe.net NS mature.ripe.net AS2119.aut-num.ripe.net NS mature.ripe.net AS1899.aut-num.ripe.net NS mature.ripe.net AS2122.aut-num.ripe.net NS mature.ripe.net AS1739.aut-num.ripe.net NS mature.ripe.net AS1741.aut-num.ripe.net NS mature.ripe.net AS1923.aut-num.ripe.net NS mature.ripe.net AS1752.aut-num.ripe.net NS mature.ripe.net AS1755.aut-num.ripe.net NS mature.ripe.net AS1241.aut-num.ripe.net NS mature.ripe.net AS2148.aut-num.ripe.net NS mature.ripe.net AS137.aut-num.ripe.net NS mature.ripe.net AS1770.aut-num.ripe.net NS mature.ripe.net AS513.aut-num.ripe.net NS mature.ripe.net AS1257.aut-num.ripe.net NS mature.ripe.net AS2004.aut-num.ripe.net NS mature.ripe.net AS517.aut-num.ripe.net NS mature.ripe.net AS679.aut-num.ripe.net NS mature.ripe.net AS1104.aut-num.ripe.net NS mature.ripe.net AS1267.aut-num.ripe.net NS mature.ripe.net AS1274.aut-num.ripe.net NS mature.ripe.net AS1275.aut-num.ripe.net NS mature.ripe.net AS697.aut-num.ripe.net NS mature.ripe.net AS174.aut-num.ripe.net NS mature.ripe.net AS719.aut-num.ripe.net NS mature.ripe.net AS544.aut-num.ripe.net NS mature.ripe.net AS1290.aut-num.ripe.net NS mature.ripe.net AS2380.aut-num.ripe.net NS mature.ripe.net AS2036.aut-num.ripe.net NS mature.ripe.net AS553.aut-num.ripe.net NS mature.ripe.net AS2043.aut-num.ripe.net NS mature.ripe.net AS1324.aut-num.ripe.net NS mature.ripe.net AS559.aut-num.ripe.net NS mature.ripe.net AS378.aut-num.ripe.net NS mature.ripe.net AS1849.aut-num.ripe.net NS mature.ripe.net NONE.aut-num.ripe.net NS mature.ripe.net AS1853.aut-num.ripe.net NS mature.ripe.net AS565.aut-num.ripe.net NS mature.ripe.net AS224.aut-num.ripe.net NS mature.ripe.net AS60.aut-num.ripe.net NS mature.ripe.net The NONE and NONE-LOCAL zones are not currently loaded. The second aspect of this is the possibilty of having an update procedure based on DNS. Here we could delegate the zone to the "guardian" and if we provided a consistency checking tool to avoid conflicts it would be a nice "dynamic" mechanism for updating AS information. We would like to go this way if you feel using DNS is reasonable as opposed to using some form of login/ftp mechanism as previous used for ripe-60 tags and planned for ripe-81. Please let us know your views on this and also please try looking at the information in the aut-num.ripe.net zone. --Tony
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