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--- ubuntu:bind:test_bind9 [2020/12/09 16:16] – created peter
+++ ubuntu:bind:test_bind9 [2020/12/09 16:23] (current) – peter
@@ Line 24: / Line 24: @@
 <WRAP info>
 **NOTE:**  You should also add the IP Address of the Secondary nameserver to your client configuration in case the Primary becomes unavailable.
+</WRAP>
+----
+===== dig =====
+If you installed the dnsutils package you can test your setup using the DNS lookup utility dig:
+After installing BIND9 use dig against the loopback interface to make sure it is listening on port 53. From a terminal prompt:
+<code bash>
+dig -x 127.0.0.1
+</code>
+You should see lines similar to the following in the command output:
+<code bash>
+;; Query time: 1 msec
+;; SERVER: 192.168.1.10#53(192.168.1.10)
+</code>
+If you configured BIND9 as a Caching nameserver “dig” an outside domain to check the query time:
+<code bash>
+dig ubuntu.com
+</code>
+Note the query time toward the end of the command output:
+<code bash>
+;; Query time: 49 msec
+</code>
+Repeat the same dig command.  There should be improvement in the time, due to caching:
+<code bash>
+;; Query time: 1 msec
+</code>
+----
+===== ping =====
+To demonstrate how applications make use of DNS to resolve a host name use the ping utility to send an ICMP echo request:
+<code bash>
+ping example.com
+</code>
+This tests if the nameserver can resolve the name ns.example.com to an IP Address. The command output should resemble:
+<code bash>
+PING ns.example.com (192.168.1.10) 56(84) bytes of data.
+bytes from 192.168.1.10: icmp_seq=1 ttl=64 time=0.800 ms
+bytes from 192.168.1.10: icmp_seq=2 ttl=64 time=0.813 ms
+</code>
+----
+===== named-checkzone =====
+A great way to test your zone files is by using the **named-checkzone** utility installed with the bind9 package.
+This utility allows you to make sure the configuration is correct before restarting BIND9 and making the changes live.
+To test our example Forward zone file enter the following from a command prompt:
+<code bash>
+named-checkzone example.com /etc/bind/db.example.com
+</code>
+If everything is configured correctly you should see output similar to:
+<code bash>
+zone example.com/IN: loaded serial 6
+OK
+</code>
+Similarly, to test the Reverse zone file enter the following:
+<code bash>
+named-checkzone 1.168.192.in-addr.arpa /etc/bind/db.192
+</code>
+The output should be similar to:
+<code bash>
+zone 1.168.192.in-addr.arpa/IN: loaded serial 3
+OK
+</code>
+<WRAP info>
+**NOTE:**  The Serial Number of your zone file will probably be different.
 </WRAP>