[OpenIndiana-discuss] OI IPv4 Stack setting DF flag on fragmented UDP packets

[Bob Friesenhahn]

On Mon, 4 Dec 2017, Markus Wernig wrote:
>
> Does anybody know a way to change that behaviour? Found nothing in dladm
> and ipadm, and this behaviour is weird.

I found this old posting

   http://whiteboard.ping.se/Networking/DnsTcp

Google tells me that fragmented DNS messages are quite evil since they 
can be used in DOS attacks.

Regardless, I expect that DNS 'named' is reponsible for setting the DF 
flag.

Bob
-- 
Bob Friesenhahn
bfriesen at simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/