Could have been but that's why I tested with a lower MTU sending back ICMP packet too big to prove that the packet sizes from the server decrease as a result.
Andras > On 21 Feb 2021, at 08:27, William Herrin <b...@herrin.us> wrote: > > On Fri, Feb 19, 2021 at 4:18 PM Andras Toth <diosbej...@gmail.com> wrote: >> Given the fact that the TCP 3-way handshake is established, sounds like some >> Path MTU blackholing happening. Due to it happening during TLS handshake >> it's likely from the server towards you. > > > Could also be another case of botched anycast TCP where packet #2 > arrived at a different server than packet #1. > > -Bill > > > > -- > William Herrin > b...@herrin.us > https://bill.herrin.us/
