Symptoms

Invalid resource record types may cause a failed transfer and core by zxfrd.

Impact

All zone transfers will fail and zxfrd will constantly be restarted until this issue is resolved.

Conditions

Attempting to transfer a zone with an invalid record type. This has been observed with the TYPE65281 record type used by Microsoft to communicate WINS servers between Microsoft servers.

Workaround

Disable or remove invalid record types. You can determine the offending record using dig. For example if the zone you are transferring is example.com and the DNS server you are transferring from is 192.0.2.50, run: dig @192.0.2.50 AXFR example.com This will result in output in zone file format. The fourth column is record type. If there is a TYPE65281 record in the zone transfer, follow the directions under "Interoperability Problems" in this Microsoft TechNet document to disable WINS server transfer: http://technet.microsoft.com/en-us/library/bb962024.aspx

Fix Information

Unrecognized or non-standard types are ignored for the purpose of stats collection.

Behavior Change