STIGQter: STIG Summary: Microsoft Exchange 2016 Mailbox Server Security Technical Implementation Guide Version: 2 Release: 3 Benchmark Date: 23 Apr 2021:

Exchange must not send nondelivery reports to remote domains.

DISA Rule

SV-228407r684255_rule

Vulnerability Number

V-228407

Group Title

SRG-APP-000435

Rule Version

EX16-MB-000640

Severity

CAT II

CCI(s)

• CCI-002385 - The information system protects against or limits the effects of organization-defined types of denial of service attacks by employing organization-defined security safeguards.

Weight

10

Fix Recommendation

Open the Exchange Management Shell and enter the following command:

Set-RemoteDomain -Identity <'IdentityName'> -NDREnabled $false

Note: The <IdentityName> value must be in single quotes.

Check Contents

NOTE: For the purpose of this requirement, “remote” refers to those domains external to the DoDIN, whether classified or unclassified. NDRs between DoDIN networks is permitted.

Open the Exchange Management Shell and enter the following command:

Get-RemoteDomain | Select Name, Identity, NDREnabled

If the value of "NDREnabled" is not set to "False", this is a finding.

Vulnerability Number

V-228407

Documentable

False

Rule Version

EX16-MB-000640

Severity Override Guidance

NOTE: For the purpose of this requirement, “remote” refers to those domains external to the DoDIN, whether classified or unclassified. NDRs between DoDIN networks is permitted.

Open the Exchange Management Shell and enter the following command:

Get-RemoteDomain | Select Name, Identity, NDREnabled

If the value of "NDREnabled" is not set to "False", this is a finding.

Check Content Reference

M

Target Key

4223

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