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

Exchange Internal Receive connectors must not allow anonymous connections.

DISA Rule

SV-228391r612748_rule

Vulnerability Number

V-228391

Group Title

SRG-APP-000261

Rule Version

EX16-MB-000470

Severity

CAT II

CCI(s)

• CCI-001308 - The information system automatically updates spam protection mechanisms.

Weight

10

Fix Recommendation

Open the Exchange Management Shell and enter the following command:

Set-ReceiveConnector -Identity <'IdentityName'> -PermissionGroups and enter a valid value user group.

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

Example: Set-ReceiveConnector -Identity <'IdentityName'> -PermissionGroups ExchangeUsers

Repeat the procedures for each Receive connector.

Check Contents

Open the Exchange Management Shell and enter the following command:

Get-ReceiveConnector | Select Name, Identity, PermissionGroups

For each Receive connector, if the value of "PermissionGroups" is "AnonymousUsers" for any receive connector, this is a finding.

Vulnerability Number

V-228391

Documentable

False

Rule Version

EX16-MB-000470

Severity Override Guidance

Open the Exchange Management Shell and enter the following command:

Get-ReceiveConnector | Select Name, Identity, PermissionGroups

For each Receive connector, if the value of "PermissionGroups" is "AnonymousUsers" for any receive connector, this is a finding.

Check Content Reference

M

Target Key

4223

Comments