Today I woke up with a Telstra’s ProtonMail Hijack news. In fact, one of my Linkedin connections, friend, sent me the ITNews post about the incident.
When I saw it, obviously it was Hijack, not Route Leak or other type of attacks but, the post was not explaining any technical detail, what kind of attack it was, can it be prevented somehow ,etc.
Thus, I wanted to mention briefly about those points, explaining technically, while trying to keep it understandable.
By the way, BGP Security and many other topics about BGP was covered in my week long BGP Zero to Hero course. If you are technical person, don’t miss it!.
Before I start explaining this incident, I should mention that, this incident was totally different than recent Century Link caused outage. In Century Link case, issue was their routing policy. In fact, carrying security policy over routing (I know sounds complex, thus I won’t mention, lack of feedback loop with Flowspec, RFC 5575).
Okay, what happened with Telstra’s Hijack?

Swiss email provider ProtonMail shared a tweet that Telstra was announcing its 185.70.40.0/24.
This subnet belongs to ProtonMail and Telstra announcing it as Continue reading