DF-Flag on UDP-based sockets?
Tom
lists at verreckte-cheib.ch
Wed Nov 30 07:20:26 UTC 2022
Hi list
Regarding ARM 9.18.9
(https://bind9.readthedocs.io/en/v9_18_9/reference.html#namedconf-statement-edns-udp-size):
"The named now sets the DON’T FRAGMENT flag on outgoing UDP packets."
Tested with BIND-9.18.9, I didn't saw any UDP packets, where the
"DF"-flag was set on the IP header (true for TCP, but never seen for UDP).
Which circumstands or which queries enforces BIND9 to set the "DF"-flag
on outgoing UDP-based packets?
Any hints for this?
Thanks a lot.
Tom
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