filter-aaaa-on-v4 does not filter AAAA if there is no existing A Record with the same FQDN - working as designed?

Tony Finch dot at
Tue Jan 24 12:04:57 UTC 2017

addie <addie at> wrote:
> is this working as designed or not? if yes, for which reasons?

It isn't documented, but there is a comment in the code which says:

	 * The filter-aaaa-on-v4 option should suppress AAAAs for IPv4
	 * clients if there is an A; filter-aaaa-on-v6 option does the same
	 * for IPv6 clients.

The actual logic is considerably more complicated than that so I won't dig
into the details of what it does in particular situations...

f.anthony.n.finch  <dot at>  -  I xn--zr8h punycode
Northwest Forties, Cromarty: Southwesterly 5 or 6, backing southerly 5 to 7.
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