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--- ubuntu:bind:logging [2020/12/09 17:40] – [Configure BIND9 to send debug messages related to DNS queries to a separate file] peter
+++ ubuntu:bind:logging [2020/12/09 18:33] (current) – [Syslog Channel] peter
@@ Line 11: / Line 11: @@
 };
 </file>
+<WRAP info>
+**NOTE:**  BIND 9 Channels:
+A channel may be defined to go to:
+  * **file**  The file pathname must be specified. Optionally, you can specify how many versions of the file can exist at one time and how big the file may grow.
+  * **syslog**  places logging into syslog.
+  * **null**  For messages you want to throw away.
+</WRAP>
+<WRAP info>
+**NOTE:**   categories are:
+  * **default**  BIND 9's default category matches all categories not specifically assigned to channels.
+    * BIND 9's **default** category doesn't match BIND's messages that aren't categorized. Those are part of the category listed next.
+  * **general**  The general category contains all of the BIND messages that aren't explicitly classified.
+  * **client**  Processing client requests.
+  * **config**  Configuration file parsing and processing.
+  * **database**  Messages relating to BIND's internal database; used to store zone data and cache records.
+  * **dnssec** Processing DNSSEC-signed responses.
+  * **lame-servers**  Detection of bad delegation (re-added in BIND 9.1.0; before that, lame server messages were logged to resolver).
+  * **network**  Network operations.
+  * **notify**  Asynchronous zone change notifications.
+  * **queries**  Query logging (added in BIND 9.1.0).
+  * **resolver**  Name resolution, including the processing of recursive queries from resolvers.
+  * **security**  Approved/unapproved requests.
+  * **update**  Dynamic update events.
+  * **xfer-in**  Zone transfers from remote name servers to the local name server.
+  * **xfer-out**  Zone transfers from the local name server to remote name servers.
+</WRAP>
 ----
+===== File Channel =====
+<code>
+logging{
+  channel my_file {
+    file "log.msgs" versions 3 size 10k;
+    severity dynamic;
+  };
+};
+</code>
+----
+===== Syslog Channel =====
+<code>
+logging {
+  channel my_syslog {
+    syslog local0; // send to syslog's local0 facility.
+    severity info; // only send severity info and higher
+  };
+};
+</code>
+<WRAP info>
+**NOTE:**  The **facility** can be specified to be any of the following: kern, user, mail, daemon, auth, syslog, lpr, news, uucp, cron, authpriv, ftp, local0, local1, local2, local3, local4, local5, local6, or local7.
+The default is **daemon**, and this is the recommended option to be used.
+</WRAP>
+<WRAP info>
+**NOTE:**  Channels allow you to filter by message severity. Here is the list of **severities**:
+  * critical
+  * error
+  * warning
+  * notice
+  * info
+  * debug [level].   The debug option can be set from 1 to 3.  If a level isn’t specified, level 1 is the default.
+  * dynamic
+</WRAP>
+----
 ===== Configure BIND9 to send debug messages related to DNS queries to a separate file =====
@@ Line 30: / Line 109: @@
 };
 </file>
-<WRAP info>
-**NOTE:**  The debug option can be set from 1 to 3.
-If a level isn’t specified, level 1 is the default.
-</WRAP>
 Since the named daemon runs as the bind user the **/var/log/named** directory must be created and the ownership changed:
@@ Line 54: / Line 126: @@
 <WRAP info>
-**NOTE:  This is a simple example of the BIND9 logging options.
+**NOTE:**  This is a simple example of the BIND9 logging options.
 For coverage of advanced options see [[https://ubuntu.com/server/docs/service-domain-name-service-dns#heading--dns-more-info|More Information]].