Tony, A big thanks to you for your suggestion on using the Perl Net::DNS module, using that, I was then able to run named-checkzone on the dumped file (35,000+ lines!) to find the one bad record which was making things crap out. I'm back a bit on bind versions, but not that far back, so I would have expected bind to just ignore that bogus record instead of crapping out.
Unfortunately, I don't think I saved a copy of the bad record so I could file a bug report, too busy trying to make things work. Cheers, John Sr. Storage Architect TOSHIBA AMERICA, INC. 290 Donald Lynch Blvd - Suite 201 Marlborough, MA 01752 508-736-5499 (mobile) E-Mail: john.stof...@toshiba.com Website: Service Now Self Service Portal -----Original Message----- From: Tony Finch <fa...@hermes.cam.ac.uk> On Behalf Of Tony Finch Sent: Tuesday, May 11, 2021 7:13 PM To: Stoffel, John (TAI) <john.stof...@toshiba.com> Cc: bind-users@lists.isc.org Subject: RE: ISC Bind as secondary to Windows Server: bad bitmap error on named xfer. Stoffel, John (TAI) <john.stof...@toshiba.com> wrote: > > And it does dump some errors too, which hopefully will give me an idea > of where my crappy bad record is located, and no use hiding crap: yuck, this looks like no fun... > http://www.cisco.toshiba.com. 3600 IN CNAME redirect.toshiba.com. > http://www.cisco.toshiba.com. 3600 IN RRSIG CNAME 8 4 3600 > 20210517093721 20210507083721 38628 t > oshiba.com. OEmGkGWSPtbjlCGVt5Ejkgncg2wRcbnfCMSm2By6Fl4gN8R1uXx/ucdN > hVrdiiP8BHWTIte/fvoMrMXbMHxarPJ C6zJn9HHdC9o2dwBoGpknTwJM > DYsy8wA5byhT9f8RVLi0WxLDmncWl2vJcZM6wsKfJ5HWAklGh9YxhOar nCM= ;; Got > bad packet: bad bitmap > 16358 bytes does it print more hexdump? who knows where the problem might be in 16KB of wire-format DNS... I would try another DNS AXFR client that might not give up so easily, e.g. if you have a handy copy of perl and Net::DNS, put your Windows DNS server IP address into this one-liner instead of 127.0.0.1 perl -MNet::DNS -wE 'my $r = Net::DNS::Resolver->new(); $r->nameservers("127.0.0.1"); for my $rr ($r->axfr("toshiba.com")) { $rr->print }' The bit of the hexdump you pasted shows another similar CNAME and its RRSIG, so it isn't very enlightening. > 46 98 80 00 00 01 00 97 00 00 00 00 07 74 6f 73 F............tos header.... RR counts qname = zone name > 68 69 62 61 03 63 6f 6d 00 00 fc 00 01 08 63 69 hiba.com......ci 00fc = axfr > 74 69 62 61 6e 6b c0 0c 00 05 00 01 00 00 0e 10 tibank.......... backpointer to zone = c00c 0005 = cname citibank looks like it follows cisco alphabetically which suggests the zone transfer might be in canonical order, which could perhaps make it easier to find the stray NXT / TYPE30 record(s) > 00 0b 08 72 65 64 69 72 65 63 74 c0 0c c0 1d 00 ...redirect..... cname target c01d = backpointer to citibank > 2e 00 01 00 00 0e 10 00 9f 00 05 08 03 00 00 0e ................ 2e = rrsig type covered = 0005 (cname) > 10 60 a2 39 51 60 94 fc 41 96 e4 07 74 6f 73 68 .`.9Q`..A...tosh > 69 62 61 03 63 6f 6d 00 83 b6 df 32 9f d9 2a 54 iba.com....2..*T > 65 16 1b 28 09 ac aa b3 41 f0 85 60 e6 e2 18 ae e..(....A..`.... etc. Tony. -- f.anthony.n.finch <d...@dotat.at> https://urldefense.com/v3/__https://dotat.at/__;!!BiNunAf9XXY-!TxYeCrRieZyIcOGlb6sXZGm2RAMoSAa_FQxkoFEaSb2XkNsrzZa1Jjd7CvB-n6i-tTNB$ Fisher, German Bight: Variable, becoming mainly west, 2 to 4. Slight or moderate in Fisher, smooth or slight in German Bight. Showers, fog patches. Moderate, occasionally very poor. _______________________________________________ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list ISC funds the development of this software with paid support subscriptions. Contact us at https://www.isc.org/contact/ for more information. bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
