Posted by Florian Weimer on Oct 14

* Dirk-Willem van Gulik:

More precisely, anything based on the historic BIND stub resolver code
(which is a lot) will escape certain characters while converting from
wire format to the textual representation, including “(“, *and* also
has a check (res_hnok) which refuses PTR records which do not follow
the rather strict syntactic requirements for host names.

Lack of quoting in a DNS API at this point means that essentially
arbitrary…