[Pdns-users] signal 6 - nessus

[Graham White]

Found this message in pdns error logs on our two pdns servers after noticing that pdns had done a restart - it seems to happen every day at the same time almost exactly an hour after we finish nessus scans and the resulting messages are exactly the same on both boxes. Can't say that the nessus scans are causing it as it seems that the restart happens an hour later after nessus has finished but there are no crons or scripts running at the time of the signal 6 and it isn't restarting at any other time. Recursion is disallowed. An example is below:

May  4 21:00:43 chubarov pdns[5326]: Not authoritative for 'www.nessus.org', sending servfail to 142.179.101.41 (recursion was desired)
May  4 21:01:38 chubarov pdns[5326]: Not authoritative for 'localhost', sending servfail to 142.179.101.41 (recursion was desired)
May  4 21:01:38 chubarov pdns[5326]: Not authoritative for '../nessus', sending servfail to 142.179.101.41 (recursion was desired)
May  4 21:02:03 chubarov pdns[5326]: Not authoritative for '1.0.0.127.IN-ADDR.ARPA', sending servfail to 142.179.101.41 (recursion was desired)
May  4 21:02:31 chubarov pdns[5326]: Received an unknown opcode 9 from 142.179.101.41 for tested.by.nessus.org
May  4 22:05:04 chubarov pdns[5326]: Got a signal 6, attempting to print trace: 
May  4 22:05:04 chubarov pdns[5326]: [0x80aa0dd]
May  4 22:05:04 chubarov pdns[5326]: [0x8177668]
May  4 22:05:04 chubarov pdns[5326]: [0x817f7e8]
May  4 22:05:04 chubarov pdns[5326]: [0x81779e0]
May  4 22:05:04 chubarov pdns[5326]: [0x817fb70]
May  4 22:05:04 chubarov pdns[5326]: [0x816d8b7]
May  4 22:05:04 chubarov pdns[5326]: [0x816d904]
May  4 22:05:04 chubarov pdns[5326]: [0x816da86]
May  4 22:05:04 chubarov pdns[5326]: [0x80f6f06]
May  4 22:05:04 chubarov pdns[5326]: [0x80af8b5]
May  4 22:05:04 chubarov pdns[5326]: [0x807ce59]
May  4 22:05:04 chubarov pdns[5326]: [0x80807d2]
May  4 22:05:04 chubarov pdns[5326]: [0x80d2a24]
May  4 22:05:05 chubarov pdns[5326]: [0x80d0851]
May  4 22:05:05 chubarov pdns[5326]: [0x8174efa]
May  4 22:05:05 chubarov pdns[5326]: [0x81b45fa]
May  4 22:05:05 chubarov pdns[28832]: Our pdns instance (5318) exited after signal 6
May  4 22:05:05 chubarov pdns[28832]: Respawning

This is on a RedHat 7.3 box using the pdns-static-2.9.8-1rpm. Any insight is greatly appreciated.

Graham White
Systems Administration
www.bravenet.com
graham at bravenet.com
Go Canucks Go!
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