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Doug Madory Profile picture
Doug Madory
@DougMadory
Director of Internet Analysis at @Kentikinc. Alum of @dynresearch @renesys @uva @dartmouth @usairforce

Sep 8, 2020, 5 tweets

RPKI in action!

On Friday, AS209 created ROAs for 64.193.176.0/20 and 64.193.192.0/20 to regain IP space hijacked by AS134121.

Networks that drop RPKI invalids (2914,1299,6939) dropped the routes, although they are still in circulation via other networks.

rpki-validator.ripe.net/announcement-p…

whois.arin.net/rest/net/NET-6…

Zoomed-in view to better understand withdrawal timing.
- AS1299 begins withdrawing at 19:22 UTC
- AS2914 begins withdrawing at 19:33 UTC
- AS6939 had route withdrawn by 19:38 UTC
(cc: @JobSnijders)

For good measure. AS209 also began announcing the 32 /24's that make up this space at 20:50 UTC.

For example, 64.193.176.0/24:

Epilogue: As of 20:01 UTC today the hijacked routes were withdrawn.

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