6.3.1 Enabling debug messages in server

Allowing debug messages in the server is possible only when configuring the sources. Two configure options are required to do this:

• The --enable-debug option specifies the server modules for which you want to enable debug messages. One or more of the following modules may be listed, separated by commas:
  • server - Messages related to networking, threads and low-level journal handling.
  • zones - All operations with zones - loading, updating, saving, timers, high-level journal management.
  • xfr - AXFR, IXFR and NOTIFY handling.
  • packet - Packet parsing and response creation.
  • rr - Details of processed resource records.
  • ns - Query processing, high-level handling of all requests (transfers, NOTIFY, normal queries).
  • loader - Zone loading and semantic checks.
  • dnssec - DNSSEC operations.
• The --enable-debuglevel option is used to specify the verbosity of the debug output. Be careful with this, as the details verbosity may produce really large logs (in order of GBs). There are three levels of verbosity: brief, verbose and details.