02/03/10

Virtual hosts
  - invole running a single Apache instance but serving
    different Web sites from a single configuration
  - clients identify the Web sites by their hostnames
  - Two approaches
    - IP-based virtual hosts: where each hostname is assigned
      a different IP address
    - Name-based virtual hosts: where each of the hostnames
      shares a single IP address

IP-based virtual hosts

  - Multiple IP addresses
    - Install mutlipe network cards and 
      E.g
      143.239.75.211 eth0 
      192.168.1.1    eth1
      127.0.0.1      lo0
  - Or IP aliasing/multihoming
    - modern platforms support the ability to have multiple
      IP addresses assigned to the same netword card
      E.g.
      143.239.75.211 eth0:1
      143.239.75.212 eth0:2
      143.239.75.213 eth0:3

  - Each web site will have its own IP address

  - How to configure Apache