[AusNOG] MTU debugging? (Or possibly just a fault with Amazon SES?)

[Damien Gardner Jnr]

Hi All,

Just wanted to come back with the happy news that some 'undisclosed'
changes on Amazon's side are resulting in quite a bit of email spilling
into our network from them now :)

Thanks all (and one especially!) for your help!

And for some fun reading, I was just linked this site:
http://shouldiblockicmp.com/

Regards,

Damien


On 3 June 2015 at 20:02, Mark Andrews <marka at isc.org> wrote:

>
> In message <CAMmROTJqXxB7vmN8Y=Uj=
> HVUr9hq7_L+YqAWFd9DwP5+vXUNRw at mail.gmail.com>, Paul Wilkins writes:
> >
> > My understanding is well behaved hosts will send DF traffic only for
> > PMTUD. If you're sending regular traffic with DF, you're pretty much
> > asking for it.
> >
> > Paul Wilkins
>
> For IPv4 PMTUD is basically only TCP with the exception of a couple
> of platforms which basically don't follow the relevent RFC by setting
> DF unconditionally.
>
> For IPv6 PMUTD basically can't be turned off.  Instead you use
> IPV6_USE_MIN_MTU and send minimal sized packets if you don't
> want to do PMUTD.
>
> Mark
> --
> Mark Andrews, ISC
> 1 Seymour St., Dundas Valley, NSW 2117, Australia
> PHONE: +61 2 9871 4742                 INTERNET: marka at isc.org
> _______________________________________________
> AusNOG mailing list
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>



-- 

Damien Gardner Jnr
VK2TDG. Dip EE. GradIEAust
rendrag at rendrag.net -  http://www.rendrag.net/
--
We rode on the winds of the rising storm,
 We ran to the sounds of thunder.
We danced among the lightning bolts,
 and tore the world asunder
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