DNS naming conventions

02 Things you need to know

Server
DNS naming conventions

Newer DNS (Domain Name System) servers no longer support the "_" underscore character, therefore, Lotus recommends that you do not name your Domino servers or TCP Host Name with names that contain the "_" underscore character.

In R5, as a migration path to move away from underscores, two DNS lookups occur in the following conditions:

Domino server name contains an underscore
Target TCP Host Name contains an underscore

For example, given a Domino server name of hr_1/Acme:

2. Do a TCP/DNS lookup using hr_1.acme.com

Given a Host Name of foo_bar.acme.com:

2. Do a TCP/DNS lookup using foo_bar.acme.com