nanog mailing list archives

Re: AWS contact?


From: Andras Toth <diosbejgli () gmail com>
Date: Sun, 21 Feb 2021 09:15:57 +1100

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 <bill () herrin us> wrote:

On Fri, Feb 19, 2021 at 4:18 PM Andras Toth <diosbejgli () 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
bill () herrin us
https://bill.herrin.us/


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