HOW TO SETUP DNS

• Get the bind (or often called named) package installed on your distribution
• Make sure you are root
• Locate named.conf (could be in /etc or /etc/bind or /etc/named)
• Edit that file according to your needs. Here are some things that you need in there:
  

  options {
   ...
   forward first;
   forwarders {
       {THE_IP_ADDRESS_OF_YOUR_UPSTREAM_DNS_SERVER;}  ;
   };
   ...
  };
  ...
  
  zone "open-ims.test" IN {
   type master;
   file "pri/open-ims.dnszone";
   notify no;
  };
  ...

  On some distributions this file includes other files so be sure to dig through those also.
  THE_IP_ADDRESS_OF_YOUR_UPSTREAM_DNS_SERVER can be found in /etc/resolv.conf.

• Now copy the file /opt/OpenIMSCore/ser_ims/cfg/open-ims.dnszone to where you configure it above
  (pri/open-ims.dnszone)

  cp /opt/OpenIMSCore/ser_ims/cfg/open-ims.dnszone /var/bind/pri/
  chown -R named:named /var/bind/pri/open-ims.dnszone

• Then start or re-start the DNS server (remember that these configuration files are not monitored
  for changes so you will have to send a SIGHUP or do a restart to reload them).

  /etc/init.d/named restart

• You should now test if it works. In the response look if you got the correct answer.
  

  dig @127.0.0.1 pcscf.open-ims.test

• To actually use it, you would need to configure it as a DNS server for your machine. Here is
  how your /etc/resolv.conf file should look like:

  # cat /etc/resolv.conf
  nameserver 127.0.0.1
  search open-ims.test
  domain open-ims.test

• Remember that utilities like the DHCP-Client overwrite this file be default!