Dear colleagues,

Sebastian Kappes and colleagues look at how routers that rewrite TTL values can cause traceroute to miss parts of a path and give a misleading picture of how networks are interconnected:

https://labs.ripe.net/author/shk/when-traceroutes-lie-how-ttl-jumps-can-give-us-a-false-impression-of-the-internets-topology/

Comments and feedback very welcome as always!

Kind regards,
Alun Davies
RIPE Labs Editor
RIPE NCC