What is BIND internal logic when such a series of queries are received, and why it would not answer to all requests.
Regards, Samer Khattab On Sun, Feb 5, 2012 at 9:42 AM, Mark Andrews <ma...@isc.org> wrote: > > In message <CAH14rHi==V=BG4AZUGTuO0m7ruQC+WiK3hRko= > oky1lepdf...@mail.gmail.com> > , Samer Khattab writes: > > Hi all, > > > > We have an observation for some queries where BIND caching server > receives > > multiple queries (three or four, A or AAAA) for a domain name, with the > > same transaction ID in the DNS header in all query packets, and one > > response packet is sent back from the server only for these queries. > > > > The client IP,source port and Server IP is the same in these queries. > > > > Is this the right BIND behavior in this case or it is an issue. > > It is expected behavior. > > > Regards, > > Samer Khattab > -- > Mark Andrews, ISC > 1 Seymour St., Dundas Valley, NSW 2117, Australia > PHONE: +61 2 9871 4742 INTERNET: ma...@isc.org >
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