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

Exchange Internal Send connectors must use an authentication level.

DISA Rule

SV-228409r612748_rule

Vulnerability Number

V-228409

Group Title

SRG-APP-000435

Rule Version

EX16-MB-000660

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-SendConnector -Identity <'IdentityName'> -TlsAuthLevel DomainValidation

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

Repeat the procedure for each Send connector.

Check Contents

Open the Exchange Management Shell and enter the following command:

Get-SendConnector | Select Name, Identity, TlsAuthLevel

For each Send connector, if the value of "TlsAuthLevel" is not set to "DomainValidation", this is a finding.

Vulnerability Number

V-228409

Documentable

False

Rule Version

EX16-MB-000660

Severity Override Guidance

Open the Exchange Management Shell and enter the following command:

Get-SendConnector | Select Name, Identity, TlsAuthLevel

For each Send connector, if the value of "TlsAuthLevel" is not set to "DomainValidation", this is a finding.

Check Content Reference

M

Target Key

4223

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