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version 1.2, 2013/03/10 09:58:15 version 1.4, 2015/06/19 19:18:31
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   **Contents**
   
   [[!toc levels=3]]
   
 # The Domain Name System  # The Domain Name System
   
 Use of the Domain Name System has been discussed in previous chapters, without  Use of the Domain Name System has been discussed in previous chapters, without
Line 455  Following are the rest of the params: Line 459  Following are the rest of the params:
   
  * `listen-on port` -- This option defined the port and associated IP addresses   * `listen-on port` -- This option defined the port and associated IP addresses
    this server will run     this server will run
    [named(8)](http://netbsd.gw.com/cgi-bin/man-cgi?named+8+NetBSD-5.0.1+i386)     [[!template id=man name="named" section="8"]]
    on. Again, the "external" interface is not listened here, to prevent queries     on. Again, the "external" interface is not listened here, to prevent queries
    getting received from "outside".     getting received from "outside".
   
Line 665  operating system's "etc" set. Line 669  operating system's "etc" set.
   
 This section has described the most important files and settings for a DNS  This section has described the most important files and settings for a DNS
 server. Please see the BIND documentation in `/usr/src/dist/bind/doc/bog` and  server. Please see the BIND documentation in `/usr/src/dist/bind/doc/bog` and
 [named.conf(5)](http://netbsd.gw.com/cgi-bin/man-cgi?named.conf+5+NetBSD-5.0.1+i386)  [[!template id=man name="named.conf" section="5"]]
 for more information.  for more information.
   
 ## Using DNS  ## Using DNS
Line 682  In addition to being able to startup "na Line 686  In addition to being able to startup "na
 controlled with the `ndc` command. In a nutshell the `ndc` command can stop,  controlled with the `ndc` command. In a nutshell the `ndc` command can stop,
 start or restart the named server process. It can also do a great many other  start or restart the named server process. It can also do a great many other
 things. Before use, it has to be setup to communicate with the "named" process,  things. Before use, it has to be setup to communicate with the "named" process,
 see the [ndc(8)](http://netbsd.gw.com/cgi-bin/man-cgi?ndc+8+NetBSD-5.0.1+i386)  see the [[!template id=man name="ndc" section="8"]]
 and  and
 [named.conf(5)](http://netbsd.gw.com/cgi-bin/man-cgi?named.conf+5+NetBSD-5.0.1+i386)  [[!template id=man name="named.conf" section="5"]]
 man pages for more details on setting up communication channels between "ndc"  man pages for more details on setting up communication channels between "ndc"
 and the "named" process.  and the "named" process.
   
Line 743  As can be seen, the domain was appended  Line 747  As can be seen, the domain was appended 
     www.yahoo.akadns.net has address 68.142.226.32      www.yahoo.akadns.net has address 68.142.226.32
   
 Other commands for debugging DNS besides  Other commands for debugging DNS besides
 [host(1)](http://netbsd.gw.com/cgi-bin/man-cgi?host+1+NetBSD-5.0.1+i386) are  [[!template id=man name="host" section="1"]] are
 [nslookup(8)](http://netbsd.gw.com/cgi-bin/man-cgi?nslookup+8+NetBSD-5.0.1+i386)  [[!template id=man name="nslookup" section="8"]]
 and  and
 [dig(1)](http://netbsd.gw.com/cgi-bin/man-cgi?dig+1+NetBSD-5.0.1+i386). Note  [[!template id=man name="dig" section="1"]]. Note
 that  that
 [ping(8)](http://netbsd.gw.com/cgi-bin/man-cgi?ping+8+NetBSD-5.0.1+i386)  [[!template id=man name="ping" section="8"]]
 is *not* useful for debugging DNS, as it will use whatever is configured in  is *not* useful for debugging DNS, as it will use whatever is configured in
 `/etc/nsswitch.conf` to do the name-lookup.  `/etc/nsswitch.conf` to do the name-lookup.
   
Line 780  Now we can start named: Line 784  Now we can start named:
 ### Testing the server  ### Testing the server
   
 Now that the server is running we can test it using the  Now that the server is running we can test it using the
 [nslookup(8)](http://netbsd.gw.com/cgi-bin/man-cgi?nslookup+8+NetBSD-5.0.1+i386)  [[!template id=man name="nslookup" section="8"]]
 program:  program:
   
     $ nslookup      $ nslookup
Line 816  the cache of our own server. Line 820  the cache of our own server.
 The results of this first test confirm that the server is working correctly.  The results of this first test confirm that the server is working correctly.
   
 We can also try the  We can also try the
 [host(1)](http://netbsd.gw.com/cgi-bin/man-cgi?host+1+NetBSD-5.0.1+i386) and  [[!template id=man name="host" section="1"]] and
 [dig(1)](http://netbsd.gw.com/cgi-bin/man-cgi?dig+1+NetBSD-5.0.1+i386) commands,  [[!template id=man name="dig" section="1"]] commands,
 which give the following result.  which give the following result.
   
     $ host www.NetBSD.org      $ host www.NetBSD.org
Line 849  which give the following result. Line 853  which give the following result.
     ;; MSG SIZE  sent: 32  rcvd: 175      ;; MSG SIZE  sent: 32  rcvd: 175
   
 As you can see  As you can see
 [dig(1)](http://netbsd.gw.com/cgi-bin/man-cgi?dig+1+NetBSD-5.0.1+i386) gives  [[!template id=man name="dig" section="1"]] gives
 quite a bit of output, the expected answer can be found in the "ANSWER SECTION".  quite a bit of output, the expected answer can be found in the "ANSWER SECTION".
 The other data given may be of interest when debugging DNS problems.  The other data given may be of interest when debugging DNS problems.
   
Removed from v.1.2  
changed lines
  Added in v.1.4

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