Looks like Leaseweb / AS60781 missed the 2 key when they were writing config for a BGP announcement, and is now originating The transit carriers rejected this (yay!) but seems like a lot of people who have direct/bi-lat sessions with them accepted it (implying they have zero BGP filtering with them) Some networks who seem to have accepted this and carried it over to a decent number of other networks:
a0f:1ac0::/29.
one honk maybe more
wolf480pl@mstdn.io
replied 22 Sep 2025 14:37 +0000
in reply to: https://benjojo.co.uk/u/benjojo/h/6xdc12lQs7vVzL2B1v
@benjojo
wait but those aren't real addresses right? Nothing should be using them?
So this is harmless and only demonstrates who needs better BGP filtering?
benjojo
replied 22 Sep 2025 14:42 +0000
in reply to: https://mstdn.io/users/wolf480pl/statuses/115248454508835653
@wolf480pl They are unallocated yes, so yes this has no real world impact other than showing who has zero or close to zero BGP filtering policy (and that should be alarming!)
teunvink@mstdn.socia..
replied 22 Sep 2025 15:14 +0000
in reply to: https://benjojo.co.uk/u/benjojo/h/6xdc12lQs7vVzL2B1v
benjojo
replied 22 Sep 2025 15:36 +0000
in reply to: https://mstdn.social/users/teunvink/statuses/115248597777837149
@teunvink Nice! Hopefully some of the networks on the "accepted" list one day add filters to bi-lats
teunvink@mstdn.socia..
replied 22 Sep 2025 15:38 +0000
in reply to: https://benjojo.co.uk/u/benjojo/h/PfSx5Y9mS7773s24w9
lemonsh@chaos.social
replied 22 Sep 2025 17:48 +0000
in reply to: https://benjojo.co.uk/u/benjojo/h/6xdc12lQs7vVzL2B1v
wtremmel@hessen.soci..
replied 22 Sep 2025 18:42 +0000
in reply to: https://benjojo.co.uk/u/benjojo/h/6xdc12lQs7vVzL2B1v
phessler@bsd.network
replied 22 Sep 2025 19:53 +0000
in reply to: https://benjojo.co.uk/u/benjojo/h/6xdc12lQs7vVzL2B1v
@benjojo we're supposed to be filtering that, but may have missed it on a bilat. will check in the morning.
antonis@mastodon.soc..
replied 22 Sep 2025 22:47 +0000
in reply to: https://benjojo.co.uk/u/benjojo/h/6xdc12lQs7vVzL2B1v