For systems using DNS resolution, at least two name servers must be configured.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-39427	GEN001375-ESXI5-000086	SV-51285r1_rule		Low

Description
To provide availability for name resolution services, multiple redundant name servers are mandated. A failure in name resolution could lead to the failure of security functions requiring name resolution, which may include time synchronization, centralized authentication, and remote system logging.

STIG	Date
VMware ESXi Server 5.0 Security Technical Implementation Guide	2017-01-06

Details

Check Text ( C-46701r1_chk )
Open the vSphere/VMware Infrastructure (VI) Client and log in with appropriate credentials. If connecting to vCenter Server, click on the desired host. Click the Configuration tab and view the listed DNS server setting(s). If DNS is not configured and is not used, this is not a finding. If DNS is configured with less than 2 servers, this is a finding.

Fix Text (F-44440r1_fix)
Open the vSphere/VMware Infrastructure (VI) Client and log in with appropriate credentials. If connecting to vCenter Server, click on the desired host. Click the Configuration tab and view the listed DNS server setting(s). If DNS is configured has less than 2 servers configured, add a second server.