DNS

So, I've been facing some DNS issues with my Ubuntu box and needed to do some debugging. While I was certain that my router was assigning the Google DNS servers (8.8.8.8 and 8.8.4.4) via DHCP to my machine, I needed to make sure that they were actually being used. Usually, I would be able to tell by looking at the output of /etc/resolv.conf oslt. However what I found in resolv.conf was


nameserver 127.0.0.53
options edns0 trust-ad


Attempting to update flashplugin on Ubuntu Precise resulted in an error. Removing the package and reinstalling it resulted in the following:

The following are some tools I'd like to note down that are handy when it comes to checking server configurations and security:

While checking the logs of my server, I ran into the following errors:
May 11 18:00:04 named[31875]: zone example.com/IN: NS 'ns1.example.com' has no address records (A or AAAA)
May 11 18:00:04 named[31875]: zone example.com/IN: NS 'ns2.example.com' has no address records (A or AAAA)
May 11 18:00:04 named[31875]: zone example.com/IN: NS 'ns3.example.com' has no address records (A or AAAA)

The Internet will go bust without DNS and the following is a guide to setting up your own DNS server to provide information about your domains and associated services. While this task can be accomplished very easily when using a hosting control panel, it is great fun to set things up on your own.

There is no minumum character requirement on sub-domain names. Yet, a number of whois and domain registration sites impose a minimum character check (usually 3) in their scripts. Decidedly batty :/