@bgptools

It's like a real-time global BGP looking glass that doesn't hate you! You can also pay us to tell you when stuff changes! Tweets by: @benjojo@benjojo.co.uk

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bgp.tools
Joined November 2018
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The bgp.tools August 2024 changelog is out! bgp.tools/kb/aug-2024-change… , This month changes include: * BGP Flapping / Churn detection * Prefix counts on AS-SET pages * NAT64 addresses are now automatically translated in the search bar to their IPv4 counterparts
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Looks like AS9498 (Bharti Airtel) typod a /32, /31 or /30. And turned it into a /3 (aka, 12.5% of the IPv4 internet) and other carriers (At least TI & GTT) accepted it!
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This halfed the number of RPKI ROV Validating ASNs according to bgp.tools (via RIPE Atlas) because those networks accepted the /3 and one of the probe IPs is inside 96.0.0.0/3
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Airtel fixed the bogus announcement at 04:40 UTC today. Looking back at the bgp.tools data, Orange/GTT/NTT/Cogent also accepted the /3 via Sparkle (TI), from Airtel. GTT's acceptance was down to a (now fixed) JunOS config gotcha xitter.cf/packetsource/status/18…
Adam Chappell@packetsource18 Jun 2024
Replying to @bgptools
Thanks BGP Ben for the alert! It turns out that prefix-length checking does contain some hidden man-traps
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Partial de-peering between Cogent (AS174) and Tata (AS6453) yesterday, first reported by @bgptools. Here's @kentikinc's view of the drop in traffic over 174_6453 beginning around 18:00 UTC on May 16.
BGP.Tools@bgptools17 May 2024
(The previous TATA-Cogent Full depeering post was wrong) It appears that TATA-Cogent have partially depeered in APAC. Cogent can't see APAC (notably India) routes anymore. It seems based on statements Cogent has initiated this depeering (Some EU/US routes seem to still be find)
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(The previous TATA-Cogent Full depeering post was wrong) It appears that TATA-Cogent have partially depeered in APAC. Cogent can't see APAC (notably India) routes anymore. It seems based on statements Cogent has initiated this depeering (Some EU/US routes seem to still be find)
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Due to this Networks that are single homed behind AS6453 (in APAC) or AS174 will not be able to reach each other. This is similar but more serious to the previous regional NTT-Cogent depeerings (since the NTT ones "just" increased latency by routing via the US instead)
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This seems to come off the back of Cogent trying to establish a market in APAC, and the main players in that region not wanting to have their market eaten away by Cogent (To be fair, Cogent is very good at getting prices down, and APAC is still quite expensive per mbps)
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The bgp.tools May 2024 changelog is out! bgp.tools/kb/may-2024-change… Major changes include: 1. Route Servers on propagation graphs, and more New display options for propagation graphs, including IXP visibility 🧵1/3
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2. Automatic Hijack Detection List generation Paying customers who have hijack detection enabled can now have their hijack lists automatically updated by the website itself, so new prefixes don't slip through the cracks! 🧵2/3
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3. Small fixes/changes Like every month, there are a number of smaller improvements and fixes that are not blockbuster features, here are this months smaller fixes and changes! Find the full changelog here: bgp.tools/kb/may-2024-change… ! 🧵3/3
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You can now change display options for the propagation graphs! You can now: * Turn on the display of IX Route Servers, * Quickly hide your own sessions, * Switch between straight lines and bendy ones.
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The bgp.tools April 2024 changelog is out! Major changes include: 1. Forward DNS History See what IPs _used_ to point into a IP block, or find out when a Domain started being served from a IP block. 🧵1/4
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more replies
3. Super Looking Glass Improvements You can now invert the ASN filter on the super looking glass, in addition the site now displays the number of paths that were not shown due to the sessions being flagged as not for public export 🧵3/4
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And finally, as always a load of smaller fixes/improvements, 🧵4/4 --- You can see the full change log here: bgp.tools/kb/april-2024-chan…
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Has 2000::/12 been announced again? Not yet! But that did not stop GTT / AS3257 from carrying such a mistake bgp.tools/prefix/2600::/12#c…
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Small improvement to the bgp.tools looking glass! You can now invert the search, and you can also see how many matching paths were "hidden" due to the feeds export settings
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New bgp.tools feature: RPKI ROA History Search! Allows you to search the RPKI ROA entries of the past, or to give you extra context of previous uses of a IP block. It was super useful when investigating the Orange Spain RPKI Incident blog.benjojo.co.uk/post/rpki…
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Find it here: bgp.tools/rpki-history?cidr=… , or by using the [History] link on the Validation tab for IP Prefixes
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