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+Configuration interface
+=======================
+
+Currently passed to Python module in init(module_id, cfg).
+
+config_file
+--------------------
+
+.. class:: config_file
+
+   This class provides these data attributes:
+
+   .. attribute:: verbosity
+   
+      Verbosity level as specified in the config file.
+
+   .. attribute:: stat_interval
+   
+      Statistics interval (in seconds).
+   
+   .. attribute:: stat_cumulative
+   
+      If false, statistics values are reset after printing them.
+   
+   .. attribute:: stat_extended
+   
+      If true, the statistics are kept in greater detail.
+
+   .. attribute:: num_threads
+   
+      Number of threads to create.
+
+   .. attribute:: port
+   
+      Port on which queries are answered.
+
+   .. attribute:: do_ip4
+   
+      Do ip4 query support.
+
+   .. attribute:: do_ip6
+   
+      Do ip6 query support.
+
+   .. attribute:: do_udp
+   
+      Do udp query support.
+   
+   .. attribute:: do_tcp
+   
+      Do tcp query support.
+
+   .. attribute:: outgoing_num_ports
+   
+      Outgoing port range number of ports (per thread).
+
+   .. attribute:: outgoing_num_tcp
+   
+      Number of outgoing tcp buffers per (per thread).
+
+   .. attribute:: incoming_num_tcp
+   
+      Number of incoming tcp buffers per (per thread).
+
+   .. attribute:: outgoing_avail_ports
+   
+      Allowed udp port numbers, array with 0 if not allowed.
+
+   .. attribute:: msg_buffer_size
+   
+      Number of bytes buffer size for DNS messages.
+
+   .. attribute:: msg_cache_size
+   
+      Size of the message cache.
+   
+   .. attribute:: msg_cache_slabs
+   
+      Slabs in the message cache.
+   
+   .. attribute:: num_queries_per_thread
+   
+      Number of queries every thread can service.
+   
+   .. attribute:: jostle_time
+   
+      Number of msec to wait before items can be jostled out.
+   
+   .. attribute:: rrset_cache_size
+   
+      Size of the rrset cache.
+   
+   .. attribute:: rrset_cache_slabs
+   
+      Slabs in the rrset cache.
+   
+   .. attribute:: host_ttl
+   
+      Host cache ttl in seconds.
+
+   .. attribute:: lame_ttl
+   
+      Host is lame for a zone ttl, in seconds.
+
+   .. attribute:: infra_cache_slabs
+   
+      Number of slabs in the infra host cache.
+   
+   .. attribute:: infra_cache_numhosts
+   
+      Max number of hosts in the infra cache.
+   
+   .. attribute:: infra_cache_lame_size
+   
+      Max size of lame zones per host in the infra cache.
+
+   .. attribute:: target_fetch_policy
+   
+      The target fetch policy for the iterator.
+
+   .. attribute:: if_automatic
+   
+      Automatic interface for incoming messages. Uses ipv6 remapping,
+      and recvmsg/sendmsg ancillary data to detect interfaces, boolean.
+   
+   .. attribute:: num_ifs
+   
+      Number of interfaces to open. If 0 default all interfaces.
+   
+   .. attribute:: ifs
+   
+      Interface description strings (IP addresses).
+
+   .. attribute:: num_out_ifs
+   
+      Number of outgoing interfaces to open. 
+      If 0 default all interfaces.
+
+   .. attribute:: out_ifs
+   
+      Outgoing interface description strings (IP addresses).
+      
+   .. attribute:: root_hints
+   
+      The root hints.
+   
+   .. attribute:: stubs
+   
+      The stub definitions, linked list.
+   
+   .. attribute:: forwards
+   
+      The forward zone definitions, linked list.
+   
+   .. attribute:: donotqueryaddrs
+   
+      List of donotquery addresses, linked list.
+   
+   .. attribute:: acls
+   
+      List of access control entries, linked list.
+   
+   .. attribute:: donotquery_localhost
+   
+      Use default localhost donotqueryaddr entries.
+
+   .. attribute:: harden_short_bufsize
+   
+      Harden against very small edns buffer sizes.
+   
+   .. attribute:: harden_large_queries
+   
+      Harden against very large query sizes.
+   
+   .. attribute:: harden_glue
+   
+      Harden against spoofed glue (out of zone data).
+   
+   .. attribute:: harden_dnssec_stripped
+   
+      Harden against receiving no DNSSEC data for trust anchor.
+   
+   .. attribute:: harden_referral_path
+   
+      Harden the referral path, query for NS,A,AAAA and validate.
+   
+   .. attribute:: use_caps_bits_for_id
+   
+      Use 0x20 bits in query as random ID bits.
+   
+   .. attribute:: private_address
+   
+      Strip away these private addrs from answers, no DNS Rebinding.
+   
+   .. attribute:: private_domain
+   
+      Allow domain (and subdomains) to use private address space.
+   
+   .. attribute:: unwanted_threshold
+   
+      What threshold for unwanted action.
+
+   .. attribute:: chrootdir
+   
+      Chrootdir, if not "" or chroot will be done.
+   
+   .. attribute:: username
+   
+      Username to change to, if not "".
+   
+   .. attribute:: directory
+   
+      Working directory.
+   
+   .. attribute:: logfile
+   
+      Filename to log to.
+   
+   .. attribute:: pidfile
+   
+      Pidfile to write pid to.
+
+   .. attribute:: use_syslog
+   
+      Should log messages be sent to syslogd.
+
+   .. attribute:: hide_identity
+   
+      Do not report identity (id.server, hostname.bind).
+   
+   .. attribute:: hide_version
+   
+      Do not report version (version.server, version.bind).
+   
+   .. attribute:: identity
+   
+      Identity, hostname is returned if "".
+   
+   .. attribute:: version
+   
+      Version, package version returned if "".
+
+   .. attribute:: module_conf
+   
+      The module configuration string.
+   
+   .. attribute:: trust_anchor_file_list
+   
+      Files with trusted DS and DNSKEYs in zonefile format, list.
+   
+   .. attribute:: trust_anchor_list
+   
+      List of trustanchor keys, linked list.
+   
+   .. attribute:: trusted_keys_file_list
+   
+      Files with trusted DNSKEYs in named.conf format, list.
+   
+   .. attribute:: dlv_anchor_file
+   
+      DLV anchor file.
+   
+   .. attribute:: dlv_anchor_list
+   
+      DLV anchor inline.
+
+   .. attribute:: max_ttl
+   
+      The number of seconds maximal TTL used for RRsets and messages.
+   
+   .. attribute:: val_date_override
+   
+      If not 0, this value is the validation date for RRSIGs.
+   
+   .. attribute:: bogus_ttl 
+   
+      This value sets the number of seconds before revalidating bogus.
+   
+   .. attribute:: val_clean_additional
+   
+      Should validator clean additional section for secure msgs.
+   
+   .. attribute:: val_permissive_mode
+   
+      Should validator allow bogus messages to go through.
+   
+   .. attribute:: val_nsec3_key_iterations
+   
+      Nsec3 maximum iterations per key size, string.
+   
+   .. attribute:: key_cache_size
+   
+      Size of the key cache.
+   
+   .. attribute:: key_cache_slabs
+   
+      Slabs in the key cache.
+   
+   .. attribute:: neg_cache_size
+   
+      Size of the neg cache.
+
+   
+   .. attribute:: local_zones
+   
+      Local zones config.
+   
+   .. attribute:: local_zones_nodefault
+   
+      Local zones nodefault list.
+   
+   .. attribute:: local_data
+   
+      Local data RRs configged.
+
+   .. attribute:: remote_control_enable
+   
+      Remote control section. enable toggle.
+   
+   .. attribute:: control_ifs
+   
+      The interfaces the remote control should listen on.
+   
+   .. attribute:: control_port
+   
+      Port number for the control port.
+   
+   .. attribute:: server_key_file
+   
+      Private key file for server.
+   
+   .. attribute:: server_cert_file
+   
+      Certificate file for server.
+   
+   .. attribute:: control_key_file
+   
+      Private key file for unbound-control.
+   
+   .. attribute:: control_cert_file
+   
+      Certificate file for unbound-control.
+
+   .. attribute:: do_daemonize
+   
+      Daemonize, i.e. fork into the background.
+
+   .. attribute:: python_script
+   
+      Python script file.