Same Transaction ID queries

2012-02-04 Thread Samer Khattab
Hi all,

We have an observation for some queries where BIND caching server receives
multiple queries (three or four,  A or ) 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.


Regards,
Samer Khattab
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Re: Same Transaction ID queries

2012-02-04 Thread Mark Andrews

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 ) 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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Re: Same Transaction ID queries

2012-02-04 Thread Samer Khattab
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 ) 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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partial zone transfer

2012-02-04 Thread Louis Luciano
What could cause a BIND 9.7.4-P1 slave nameserver to partially transfer a
zone from it’s master after a script on the master performs an rndc reload
of said zone? We have seen three occasions where the slave transferred only
¾ of the zone (550,000 lines out of 870,000 lines) and loaded the zone
without error.

 

Regards,

Louis Luciano

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