Overview

All Linux servers are locked down to the highest security standards possible. All services are off by default and all ports shut. Only the required services started. 

To lock down a server:-

• • Install and run only the services you require.
  • Block all ports by default and open only those that are required
  • Run servers as low permission user
  • Disable direct login to ROOT completely.
  • Block SSH login attempts from unknown locations and machines.
  • Set up tripwire to detect intrusions
  • Increase file handles

On 28 of March 2013 the web's DNS was under attack by one of the largest DDoS attack in the web's history.

http://www.abc.net.au/news/2013-03-28/huge-cyber-attack-slows-internet-globally/4598574

The DNS is used by a web browser to translate a host name to a IP address, which is a bit like using a phone book to look up a person's phone number.

There are a number of ways of working around a DNS outage:-

Change the DNS servers used

• This can be done on the Router setup
• This can be done on the browser itsel