Really, please read the RFCs and don’t try to reverse engineer a DNS server. You will get it wrong. As a recursive server developer we are sick and tired of people who do half baked DNS implementations because they failed to take the time to read the specifications.
Read the errata. Read the updating RFC. RFC 1034, 4.3.2. Algorithm RFC 8906, 3.1.2. Unknown/Unsupported Type Queries Your type list is also too short to meet the minimal set of types needed for an interoperable server. Read the other half of STD13, RFC 1035. Mark > On 15 Sep 2021, at 17:40, Sonal Pahuja <sonal.s.pah...@oracle.com> wrote: > > Hi Mark, > > Thanks for the response. Now NS query is working fine!! > > But I have one more query- > > we have our application to resolve e164 domain queries i.e NS, NAPTR and > CNAME queries only. If user give any other query type then application sends > RCODE=4(NOT_IMPLEMENTED) in response. > But bind9 is rejecting our response and sends SERVFAIL. > > Attached is the PCAP. > > Please share your views again on this. Thanks in advance! > > Regards, > Sonal > > > > -----Original Message----- > From: Mark Andrews [mailto:ma...@isc.org] > Sent: Wednesday, September 15, 2021 1:51 AM > To: Sonal Pahuja <sonal.s.pah...@oracle.com> > Cc: bind-users@lists.isc.org > Subject: [External] : Re: NS query on bind9 > > Named is very picky about returned SOA records in negative responses. If it > has followed/seen a delegation then the returned SOA record in the response > needs to be at or below that point. > > I suspect that named has a cached NS RRset between e164.arpa and > 4.0.4.5.2.4.1.4.2.0.2.4.e164.arpa which is causing the returned response to > be rejected. > > Mark > > -- > Mark Andrews, ISC > 1 Seymour St., Dundas Valley, NSW 2117, Australia > PHONE: +61 2 9871 4742 INTERNET: ma...@isc.org > > <15sep_RCODE=4.pcap> -- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: ma...@isc.org _______________________________________________ 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
