TCP and UDP Port 0 - Should an ISP or ITP Block it?

Tue Aug 25 12:18:35 UTC 2020

Peace,

On Tue, Aug 25, 2020, 3:14 PM Jon Lewis <jlewis at lewis.org> wrote:

> When an application sends more data via UDP than can be fit in a single
> packet, only the first packet has a UDP header [where the port info is
> stored].  The rest of the fragments have no UDP header, which most things
> will report as UDP src/dst port = 0.
>

Oh yes, if you don't reassemble fragments on your equipment then please
please do not filter anything.

--
Töma

>
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