Before we begin

Set up the test environment

$ cd elnx-syllabus/demo
$ vagrant up db
[...]
$ vagrant ssh db

Agenda

• Network interface types
  • NAT
  • Host-only
  • Bridged
  • Internal
• Recommendations

NAT adapter

NAT = Network Address Translation

Pro/con

• Reliable Internet access
• Not routable from host system

IP settings

Expected values:

Bridged adapter

Pro/con

• Routable from host system
  • and even other hosts on the LAN!
• Internet access
• Inconsistent IP settings
  • Different subnet / IP
  • May not receive IP settings from DHCP

Host-only adapter

Pro/con

• Routable from host system
• Consistent IP settings
• No Internet access

IP settings

The “default” host-only network:

Range 2-99 can be assigned as static IP addresses

Internal adapter

• Like Host-Only, but
  • not routable from host system
  • no DHCP

Recommendation

Give your VMs two adapters:

• Adapter 1: NAT
  • for reliable internet access
• Adapter 2: Host-only
  • to access VM as server over the network
  • on a predictable IP address

Best of both worlds!