[bitfolk] Problems with the authoritative nameservers and names with \032 in them

Hello, It was brought to my attention earlier today that a zone file correctly loaded into a customer's BIND nameserver and transferred to BitFolk's servers was not being served correctly by two of the servers. On further investigation it seems that there's some bug in PowerDNS regarding DNS names (the bit on the left hand side) with "\032" in them. Last year I fixed a bug in the sqlite backend of PowerDNS regarding incorrect escaping of "\", which had prevented "\032" and anything else with "\" in it being stored correctly as DNS content (the right hand side). I'm not yet sure if this is related or more fundamental. I've reported the bug. At the moment the impact is that if you have a DNS zone with something like this in it: foo\032bar._http._tcp SRV 0 0 10 baz.example.com. then it will get stored in b.authns.bitfolk.com and c.authns.bitfolk.com as: foo bar._http._tcp SRV 0 0 10 baz.example.com. This is incorrect. BIND servers taking the same AXFR would store "foo\032bar._http._tcp". Anything correctly querying for "foo\032bar._http._tcp" will not get answers from the affected servers. Therefore for the moment if you have zones that use these types of record on the left hand side, you should not delegate them to {b,c}.authns.bitfolk.com. "\032" on the right hand side is okay. If you use PowerDNS yourselves I'd be interested to know if you can replicate this with backends other than gsqlite (e.g. gmysql or gpsql), as this would indicate whether it's a problem with the gsqlite backend or something else. FWIW this type of DNS name seems to be used for DNS-based service discovery: http://www.dns-sd.org/ Cheers, Andy -- http://bitfolk.com/ -- No-nonsense VPS hosting _______________________________________________ announce mailing list announce(a)lists.bitfolk.com https://lists.bitfolk.com/mailman/listinfo/announce