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Bind slave server not updating

Bind slave server not updating

If the tests described above indicate that ns1 is not functioning as intended then you should attempt to answer the following questions: Is named is running on ns0 as an authoritative nameserver for example. Is named is running on ns1?

Has ns1 successfully performed an initial zone transfer, and if not why? Does ns0 notify ns1 when the zone serial number changes? Does ns1 perform further zone transfers when notified by ns0?

Questions 1 to 3 are relevant when ns1 is not working as a nameserver at all. Questions 4 and 5 are relevant when it is working, but not responding to updates. Before looking at ns1 it would be prudent to check that ns0 is working. A good way to do this is to perform a remote query from ns0 to ns1 concerning the zone you are attempting to serve: The absence of any response at all could indicate that there is no nameserver running on ns0, or that there is a problem with network connectivity.

Whatever the reason, it will need to be addressed before the slave nameserver on ns1 can be properly tested. You can check whether named is running using the ps command: If it does not start then this may indicate that: The first of these is the more likely explanation.

The log should contain enough information to identify the cause. You can check whether an initial zone transfer has occurred by looking for the zone file. This is the argument to the file statement in the zone declaration: If it has not been written then this could be because: You can check the first four points by viewing DNS traffic to and from ns1 using tcpdump: If ns0 refused to transfer the zone then this should be recorded in the log on ns0, for example: You can check whether ns0 is notifying ns1 by using tcpdump to view the traffic: Check whether ns1 performs further zone transfers when notified Subsequent zone transfers can be viewed in the same way as the initial transfer, but may be considerably smaller if you have enabled the use of incremental transfers.

The most likely reason for the slave not requesting a transfer when it has received a notification is if it already has a copy of the zone with the same or a more recent serial number. In that case you should advance the serial number of the master zone file until it is greater than that of the slave zone file.

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Bind slave server not updating

If the tests described above indicate that ns1 is not functioning as intended then you should attempt to answer the following questions: Is named is running on ns0 as an authoritative nameserver for example. Is named is running on ns1? Has ns1 successfully performed an initial zone transfer, and if not why? Does ns0 notify ns1 when the zone serial number changes? Does ns1 perform further zone transfers when notified by ns0?

Questions 1 to 3 are relevant when ns1 is not working as a nameserver at all. Questions 4 and 5 are relevant when it is working, but not responding to updates. Before looking at ns1 it would be prudent to check that ns0 is working.

A good way to do this is to perform a remote query from ns0 to ns1 concerning the zone you are attempting to serve: The absence of any response at all could indicate that there is no nameserver running on ns0, or that there is a problem with network connectivity.

Whatever the reason, it will need to be addressed before the slave nameserver on ns1 can be properly tested. You can check whether named is running using the ps command: If it does not start then this may indicate that: The first of these is the more likely explanation. The log should contain enough information to identify the cause.

You can check whether an initial zone transfer has occurred by looking for the zone file. This is the argument to the file statement in the zone declaration: If it has not been written then this could be because: You can check the first four points by viewing DNS traffic to and from ns1 using tcpdump: If ns0 refused to transfer the zone then this should be recorded in the log on ns0, for example: You can check whether ns0 is notifying ns1 by using tcpdump to view the traffic: Check whether ns1 performs further zone transfers when notified Subsequent zone transfers can be viewed in the same way as the initial transfer, but may be considerably smaller if you have enabled the use of incremental transfers.

The most likely reason for the slave not requesting a transfer when it has received a notification is if it already has a copy of the zone with the same or a more recent serial number. In that case you should advance the serial number of the master zone file until it is greater than that of the slave zone file.

Bind slave server not updating

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4 Comments

  1. Whatever the reason, it will need to be addressed before the slave nameserver on ns1 can be properly tested.

  2. Password Linux - Server This forum is for the discussion of Linux Software used in a server related context. This is the argument to the file statement in the zone declaration:

  3. Is named is running on ns1? If ns0 refused to transfer the zone then this should be recorded in the log on ns0, for example: For more advanced trainees it can be a desktop reference, and a collection of the base knowledge needed to proceed with system and network administration.

  4. The first of these is the more likely explanation. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features.

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