Re: Protocol 17 floods from Vietnam & Mexico?

[Mark Andrews <marka () isc org>]

In message <08ed2903-c81c-aa2e-cd04-4fa117840d14 () gmx com>, Large Hadron Collider writes:
> Yes, I'm being UDP flooded. I worked that out by grepping /etc/protocols.
>
>
> On 12/09/2017 18:24, Matt Harris wrote:
> > Protocol 17 is UDP.  UDP is pretty common on the internet. Not sure 
> > why source and destination ports aren't being shown by your tool 
> > there, might be malformed UDP packets designed to obscure themselves 
> > from or otherwise evade some intrusion detection or firewall systems.

No ports are listed because they are not the initial fragment of
the UDP packet.  Only the initial fragment that contains the UDP
header has the ports reported.

Mark
-- 
Mark Andrews, ISC
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PHONE: +61 2 9871 4742                 INTERNET: marka () isc org