[Asrg] DNSxL notation for IPv6?

[der Mouse]

> [...] the status of DNSxL notation for IPv6.

> What would make sense, and what not?  What has already been tried?

Well, I run a semi-private DNSBL myself ("private" because I don't
document it and the listing/delisting criteria are basically "whatever
I feel like", but "semi-" because it *is* available in the public DNS
for anyone to query who's crazy enough to want to).

For IPv6, I use reversed-nibble notation, basically taking the syntax
used for rDNS lookups, ripping off the .ip6.arpa, and slapping on the
appropriate DNSBL domain.  It works for me.

> Besides the bandwidth argument (is this a valid argument?)

I don't think so.  Reversed-nibble takes 64 bytes of DNS packet
contents (alternating length bytes and nibble-in-ASCII-hex bytes); I
don't consider this large enough to be an issue, especially since it
will normally occur only once per packet, even if multiple records are
returned, thanks to name compression.

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