Diff for "DNS"

Creative External DNS

• Connect to muppets.crecom.com.au

• su to root

• for crecom.com.au vi /home/named/var/named/zone/crecom

• for creativecomputing.com.au vi /home/named/var/named/zone/creative

• for creativeretailsystems.com vi /home/named/var/named/zone/creativeretail

• for creativeretailsystems.com.au vi /home/named/var/named/zone/creativeretailau

• Update date field on line 3 in the following format: YYYYMMDDHH
• Update appropriate DNS record

• Save <filename> , and quit to command line

• Execute the following commands

 /etc/init.d/named restart

Which will perform the following functions automatically:

 /etc/init.d/named-vpn stop
 /etc/init.d/named-internal stop
 /etc/init.d/named-external restart
 /etc/init.d/named-internal start
 /etc/init.d/named-vpn start

Changing nameserver IP

Since we are not using portable IP addresses, the IP's we use will change when we switch to a different internet service provider (ISP). The old ISP will take back their IP, which our NS is pointing to, and we will get a new set of IP's. Before this change happens, it is good practice to lower the Time to live (TTL) of all our zones to a really low value (5 minutes is a good rule of thumb) and then wait for your old TTL to expire. In this example, the 2 86400 (in seconds = 1 day) lines should be changed to 300 (5 minutes).

@       86400   IN      SOA     muppets.crecom.com.au.  hostmaster.crecom.com.au. (
                        2007021311 ; serial (Year,Month,Day,Hour/increment)
                        28800 ; refresh
                        14400 ; retry
                        360000 ; expire
                        86400) ; default_ttl

And like with any other DNS changes, do not forget to update the serial number. Once this is done. A phone call would have to be made to our DNS registrar. Melbourne IT 1300 654 677. Have the "My account" loaded to the "manage Domain Names" screen. Explain to the tech on the phone that you are switching ISP's and would have to modify the IP address of your NS records (as of this writing, we only have muppets.crecom.com.au for all our domains). Give them the new IP address(es), and then they will verify that you are who you say you are by asking for the Registry key, which we fortunately already have on screen. They will tell you that someone will work on this soon and it might take 48 hours for it to propagate. Use dig to verify that they have done the change:

$ dig muppets.creativecomputing.com.au @ns3.melbourneit.com.
  ...... snipped .......
;; AUTHORITY SECTION:
creativecomputing.com.au. 3600  IN      NS      muppets.crecom.com.au.
creativecomputing.com.au. 3600  IN      NS      ns17.zoneedit.com.
creativecomputing.com.au. 3600  IN      NS      ns13.zoneedit.com.
;; ADDITIONAL SECTION:
muppets.crecom.com.au.  3600    IN      A       211.27.34.242

In this query the address for muppets.crecom.com.au reads 211.27.34.242. If this is the new IP, it means they have made the change. If this is the old IP, continue waiting. If it does not change (after 48 hours), and you don't get any emails, it means that Melbourne IT have not been doing their job, call them back. Once this is complete, modify the A record (of muppets.crecom.com.au) to read the new IP once the change has taken place. This will be a good time to update all the other records as well. Let a few days pass and verify that everything is working as expected and change the TTL back to 86400.

FreeDNS

We have set up an external DNS hosting service called FreeDNS. Under normal circumstances there would be no need to change this. But if we are changing IPs or adding a domain, you have to log in and use the web front end to change things accordingly. Open up their website at http://freedns.afraid.org. Our login name is CComputing2. Password is funky control. After logging in and selecting a zone to edit, you will see a text box for "Master DNS IP". Enter the new IP in this box. In a few hours, FreeDNS's servers will transfer records from our master DNS (muppets) and serve them.

Creative Internal DNS

• Connect to muppets.crecom.com.au

• su to root

• vi /home/named/var/named/zone/internal

• Update date field on line 3 in the following format: YYYYMMDDHH
• Update appropriate DNS record

• Save internal , and quit to command line

• Execute the following commands

 /etc/init.d/named restart

Which will perform the following functions automatically:

 /etc/init.d/named-vpn stop
 /etc/init.d/named-internal stop
 /etc/init.d/named-external restart
 /etc/init.d/named-internal start
 /etc/init.d/named-vpn start