Common operational misconceptions
regnauld at nsrc.org
Thu Feb 16 07:44:37 CST 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).
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