Common operational misconceptions

Thu Feb 16 13:44:37 UTC 2012

Mark Andrews (marka) writes:
> If you want to know if your resolver talks IPv6 to the world and
> supports 4096 EDNS UDP messages the following query will tell you.
> 
> 		dig edns-v6-ok.isc.org txt
> 
> Similarly for IPv4.
> 
> 		dig edns-v4-ok.isc.org txt
> 

	9.8.1P1 on a dual stacked native v6 host: I'm seeing TC on both answers,
	the difference is the TCP answer comes through on v4 but v6 gives SERVFAIL.

	Don't see any v6 fragments (that'd be a problem since PF doesn't handle
	them on this host).

	P.