kentik Product Updates logo
Back to Homepage Subscribe to Updates

Product Updates

Latest features, improvements, and product updates on Kentik's Network Observability platform.

Labels

  • All Posts
  • Improvement
  • Hybrid Cloud
  • Core
  • Service Provider
  • UI/UX
  • Synthetics
  • Insights & Alerting
  • DDoS
  • New feature
  • BGP Monitoring
  • MyKentik Portal
  • Agents & Binaries
  • Kentik Map
  • API
  • BETA
  • Flow
  • SNMP
  • NMS
  • AI

Jump to Month

  • April 2025
  • March 2025
  • February 2025
  • January 2025
  • December 2024
  • November 2024
  • October 2024
  • August 2024
  • July 2024
  • June 2024
  • May 2024
  • April 2024
  • March 2024
  • February 2024
  • January 2024
  • December 2023
  • November 2023
  • October 2023
  • September 2023
  • August 2023
  • July 2023
  • June 2023
  • May 2023
  • April 2023
  • March 2023
  • February 2023
  • January 2023
  • December 2022
  • November 2022
  • October 2022
  • September 2022
  • August 2022
  • July 2022
  • June 2022
  • May 2022
  • April 2022
  • March 2022
  • February 2022
  • December 2021
  • November 2021
  • October 2021
  • September 2021
  • July 2021
  • June 2021
  • May 2021
  • March 2021
  • February 2021
  • January 2021
  • December 2020
  • October 2020
  • September 2020
  • June 2020
  • February 2020
  • August 2019
  • June 2019
  • April 2019
  • March 2019
  • February 2019
  • January 2019
  • December 2018
  • November 2018
  • September 2018
  • August 2018
  • June 2018
  • May 2018
  • April 2018
  • March 2018
  • February 2018
  • January 2018
  • December 2017
  • November 2017
  • October 2017
  • July 2017
  • June 2017
  • May 2017
  • April 2017
  • March 2017
  • February 2017
  • January 2017
  • December 2016
  • November 2016
  • October 2016
  • April 2016
ImprovementSyntheticsBGP Monitoring
2 years ago

BGP Monitor: Upstream Leak testing is out

BGP Monitor tests in Kentik Synthetic Monitoring came out including tests for the following elements:

  • Reachability: % of BGP Vantage Point threshold to determine whether prefixes are visible “enough” through the public internet
  • Allowed Origin: whether detected originators are part of an allowed-list (manually specified, or via RPKI) - this is commonly referred to as “Origin Hijack Monitoring”

The health of a BGP Monitor test was then the worse of these two tests, across all prefixes registered in the test, with the specificity that “Allowed Origin” could only be healthy or critical.


The “Allowed ASNs” test has now been renamed “Origin Hijack detection” to match what the industry is calling it.

Additionally, we have added “Upstream Leak Detection” - here’s the practical use for it:

In a normal situation, you only want your Upstream IP Transit Providers to announce your prefixes to the rest of the world: under no circumstance do you usually want your peers to announce your prefixes to the rest of the world as if they were your transit provider. They should keep these routes to themselves, and only use them to go from their network to yours (announcing them to their peers will break that partition).

Enters #4 step of the updated BGP Monitor test where you can now enter the ASNs of your “official” Upstream Transit Providers and we will inspect the 1st hop in the AS Path of all announcements of these prefixes (and of their more specific children).

Remember that with all BGP Announcements collected from the BGP Vantage Points, come an AS_PATH that gives the following information:

…. various ASNs …

If the is not part of your allowed list of Transit Providers for any of the prefixes (and their more specifics), the entire BGP Monitor test will be flagged as critical for “Upstream Leak”.

For further reference, the diagram below details Origin Hijack vs Upstream Leak


Avatar of authorGreg Villain