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directory "/var/named/";
allow-query {127.0.0.1; 192.168.X.0/24;};
#forwarders { 192208.16867.40222.2222; };# This one works at home forwarders { 10.102.100.21; }; # This one works at Seneca
};
zone "localhost" {
= INVESTIGATION 3: CONFIGURING THE DNS SERVER FOR REVERSE LOOKUPS =
As it stands now, your server will only handle forward resolution (converting names into addresses), but it is also common to need sometimes necessary to convert addresses back into human readable names. In some situations an For public IP addresses only your ISP will can provide this service for you, but most organizations at least need to handle their . For private networks you can set it up for your own internal addressesorganisation. You also But even if you're setting up reverse DNS on the public internet - you need to understand what information the ISP would require.
Issue the following commands on any of your VMs (once again replacing X with your network octet):
<ol><li>Refer to the [http://www.zytrax.com/books/dns/ch8/ ptr.html reference documentation] for '''PTR''' records.</li>
<li>Add the extra records needed to complete this zone (again, you should only need three more).</li>
<li>Restart the service and test these records to make sure they work.</li>
Follow the instructions for lab 3 on blackboard.
===In Class Submission (Murray SaulAndrew's Classes only)sections==='''Arrange evidence (command output) for each of these items on your screen, then ask your instructor to review them and sign off on the lab's completion:'''
You may choose to:
* Submit screenshots of your work on Blackboard, in which case you don't need to come to the lab.
* Or come to the lab, show me your work, and talk to me about it. I want to hear what you've learned and answer any questions you have.
You'll get the same grade regardless of how you choose to submit your work.
Expected results of this lab are:
::<span style="color:green;font-size:1.5em;">✓</span>Comment out the hostname resolution (/etc/hosts) files for ALL vms, and use '''host''' command to query from a VM, the IPADDR for:<br><blockquote>'''host.yoursenecaid.ops''' , '''vm1.yoursenecaid.ops''' , '''vm2.yoursenecaid.ops''' , and '''vm3.yoursenecaid.ops'''</blockquote>
::<span style="color:green;font-size:1.5em;">✓</span>'''nslookup''' information ('''A''', '''NS''', '''MX''' records) for:<br><blockquote>'''host.yoursenecaid.ops''' , '''vm1.yoursenecaid.ops''' , '''vm2.yoursenecaid.ops''' , '''vm3.yoursenecaid.ops'''.</blockquote>
::<span style="color:green;font-size:1.5em;">✓</span>'''dig +trace''' for:<br><blockquote>'''host.yoursenecaid.ops''' , '''vm1.yoursenecaid.ops''' , '''vm2.yoursenecaid.ops''' , '''vm3.yoursenecaid.ops'''.</blockquote>
::<span style="color:green;font-size:1.5em;">✓</span>Download the labcheck3.bash checking bash shell script by issuing the command:<br><br>and run '''wget httphttps://matrixict.senecac.onsenecacollege.ca/~peterandrew.callaghan/filessmith/OPS335ops335/labcheck3.bash'''<br><br>set execute permission and run the shell script on your '''host''' machine. ::*For '''Peter's classes''', follow his Online Submission instructions in Moodle.::*For '''Murray's classes''', run command (piping to the '''more''' command) and show output to instructor.
::<span style="color:green;font-size:1.5em;">✓</span>Completed Lab3 log-book notes.
#What parameter did you set in that file to tell the machine to refer to your own DNS server?
#What is the purpose of the '''/etc/resolv.conf''' file?
#What are type '''A''' records used for?
#What security features are available for DNS?
