Agenda: dns-delegation-exercise-inst-is-slave.txt

                        DNS Exercise - Delegation
                        -------------------------

In this exercise, we will create a new TLD in our root.
for example: MYTLD

You will create a master nameservice on your own machine, and you will get
secondary service from the instructor, provided by "auth1.grpYYY.ws.nsrc.org"
(YYY is the group of the instructor, which will be communicated in class).

Then you will ask the administrator for the domain above you (the root) to
delegate your domain to you - this is also the instructor.

Note: the following should be done as the "root" superuser - use sudo -s

Firstly, note that your hostname is configured correctly
on your machine.  Check that it is configured correctly by
using the 'hostname' command - e.g. on auth1.grpXX.ws.nsrc.org, if you type:

 # hostname

You should see:

  auth1.grpXX.ws.nsrc.org

If NOT, then configure your server with its name: e.g. for

        auth1.grp25.ws.nsrc.org, type:

 # hostname auth1.grp25.ws.nsrc.org

Remember to replace "grpXX" with the the proper group number!

Edit the file /etc/rc.conf (using "vi" or "ee", i.e.: ee /etc/rc.conf),
and update the "hostname":

  hostname="auth1.grpXX.ws.nsrc.org"

In the file /etc/hosts, you should see a line:

  10.10.X.1   auth1.grpXX auth1.grpXX.ws.nsrc.org


Exercise
--------

*   Choose a new domain, write it down somewhere

    i.e.: "MYTLD" or "EARTH" - whatever you feel like.

    (Do NOT choose any of the PC names, e.g. `auth1.grpXX`, as your subdomain)

    This could for example be the name of your country code, country name,
        company name, etc...  but REMEMBER that someone might pick the same name!
        First come, first serve.

*   Create your zone file in `/etc/namedb/master/MYTLD`
    (where MYTLD is your chosen domain) -- you can pretty much
    "copy and paste" the section below -- but remember to update
    the XXX with your IP:

  ***   Remember, you will need to become root to create this file,
  ***   so, e.g.
  ***
  ***     $ cd /etc/namedb/master
  ***     $ sudo vi MYTLD
  ***
  ***   (feel free to use another editor instead of vi, e.g. joe, ee)

- - - - - - - - - - - - - cut below - - - - - - - - - - - -

$TTL 2m
@       IN      SOA     auth1.grpXX.ws.nsrc.org. your.email.address. (
                        2012022301    ; Serial - replace 20120223 with the date
                        10m           ; Refresh
                        5m            ; Retry
                        4w            ; Expire
                        2m )          ; Negative

        IN      NS      auth1.grpXXX.ws.nsrc.org.   ; master
        IN      NS      auth1.grpYYY.ws.nsrc.org.   ; slave at instructor

www     IN      A       10.10.XXX.1             ; your own IP

- - - - - - - - - - - - - cut above - - - - - - - - - - - -

    Replace `your.email.address.` with your home E-mail address, so that
        user@domain.name becomes user.domain.name

        XXX and YYY are the IP of your group, and your slave's, respectively.
        
    We have chosen purposely low values for TTL, refresh, and retry to make
    it easier to fix problems in the classroom. For a production domain you
    might use higher values.

*   Edit `/etc/namedb/named.conf` and do the following:

  ***   Remember, you will need to become root to edit this file,
  ***   so, e.g.
  ***
  ***     $ cd /etc/namedb
  ***     $ sudo vi named.conf
  ***
  ***   (feel free to use another editor instead of vi, e.g. joe, ee)

    - If it is still there, REMOVE the following line:

         listen-on { 127.0.0.1; };

    ... and add another line in the options section:

        allow-query { any; };

    ... so that your nameserver will now answer queries from the network

    - Add a section to configure your machine as master for
      your domain, by adding something like this at the end
          (the bottom) of the file:

      zone "MYTLD" {
        type master;
        file "/etc/namedb/master/MYTLD";
      };

    Pay attention to the ';' and '}' !

*   Check that your config file and zone file are valid:

        # named-checkconf
        # named-checkzone MYTLD /etc/namedb/master/MYTLD

    * If there are any errors, correct them ! *

*   Tell the instructor managing grpYYY that you need secondary service for
    your domain - tell them the domain and tell them what your group number is.

        For instance, if the domain is "COCONUT", and you are Group 5, you
        should write on a piece of paper

COCONUT. NS  auth1.grp5.ws.nsrc.org.
COCONUT. NS  auth1.grpYYY.ws.nsrc.org.   (YYY = the group of the instructor)

        And give this to the instructor managing grpYYY

*   If this is not already done, enable named in your server's configuration,
    by editing the file /etc/rc.conf and adding, if this is not already done:

     ** Remember, again, you need to be root to edit this file

        named_chrootdir=""
        named_enable="YES"

    - Then start/restart named with

        # service named restart

    Check the result with

        # tail /var/log/messages

        Verify with dig that MYTLD is now configured on your host:

                # dig @10.10.XX.1 MYTLD. NS

        Where "XX" is the address of your machine.

        You can also check the nameserver status using rndc:

                # rndc status

    - If there are any errors, correct them. Some configuration errors can
    cause the daemon to die completely, in which case you may have to
    start it again:

        # /etc/rc.d/named restart

*   Check that you and the instructor slave at grpYYY are giving authoritative
    answers for your domain:

        # dig +norec @10.10.XXX.1 MYTLD. SOA
        # dig +norec @10.10.YYY.1 MYTLD. SOA

    Check that you get an AA (authoritative answer) from both, and that
    the serial numbers match.

*   Now you are ready to request delegation:

    a) if using the RZM:

    Go to https://rzm.dnssek.org/

    Choose signup.

    Username is your domain name ("COCONUT") for example.
    Password is up to you but you must remember it.

    We will do a demo of the interface in class.

    b) if not using the RZM:

    Indicate to the instructor, on a piece of paper:


        Domain name:          ___________________

        Master nameserver:    auth1.grp___.ws.nsrc.org

        Slave nameserver:     auth1.grp___.ws.nsrc.org

*   Once you have delegation, try to resolve www.MYTLD:

    - On your own machine

    - On someone else's machine - will it work ?

  # dig @10.10.XXX.1 www.MYTLD       (where MYTLD is your domain)

*   Add a new resource record to your zone file. Remember to update the
    serial number. Check that your slaves have updated. Try resolving this
    new name.