STIGQter STIGQter: STIG Summary: Microsoft Exchange 2016 Edge Transport Server Security Technical Implementation Guide Version: 2 Release: 2 Benchmark Date: 22 Jan 2021:

The Exchange Sender Reputation filter must identify the spam block level.

DISA Rule

SV-221238r612603_rule

Vulnerability Number

V-221238

Group Title

SRG-APP-000261

Rule Version

EX16-ED-000390

Severity

CAT II

CCI(s)

Weight

10

Fix Recommendation

Update the EDSP to reflect the SrlBlockThreshold size.

Open the Exchange Management Shell and enter the following command:

Set-SenderReputationConfig -SrlBlockThreshold 6

or

The value as identified by the EDSP that has obtained a signoff with risk acceptance.

Check Contents

Note: If third-party anti-spam product is being used, the anti-spam product must be configured to meet the requirement.

Review the Email Domain Security Plan (EDSP).

Determine the SrlBlockThreshold value.

Open the Exchange Management Shell and enter the following command:

Get-SenderReputationConfig | Select Name, SrlBlockThreshold

If the value of SrlBlockThreshold is not set to "6", this is a finding.

or

If the value of "SrlBlockThreshold" is set to a value other than "6" and has signoff and risk acceptance in the EDSP, this is not a finding.

Vulnerability Number

V-221238

Documentable

False

Rule Version

EX16-ED-000390

Severity Override Guidance

Note: If third-party anti-spam product is being used, the anti-spam product must be configured to meet the requirement.

Review the Email Domain Security Plan (EDSP).

Determine the SrlBlockThreshold value.

Open the Exchange Management Shell and enter the following command:

Get-SenderReputationConfig | Select Name, SrlBlockThreshold

If the value of SrlBlockThreshold is not set to "6", this is a finding.

or

If the value of "SrlBlockThreshold" is set to a value other than "6" and has signoff and risk acceptance in the EDSP, this is not a finding.

Check Content Reference

M

Target Key

4079

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