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Re: Common operational misconceptions
From: Phil Regnauld <regnauld () nsrc org>
Date: Thu, 16 Feb 2012 14:44:37 +0100

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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