STIGQter: STIG Summary: Microsoft Exchange 2013 Mailbox Server Security Technical Implementation Guide Version: 2 Release: 1 Benchmark Date: 22 Jan 2021:

The Exchange Receive Connector Maximum Hop Count must be 60.

DISA Rule

SV-207304r615936_rule

Vulnerability Number

V-207304

Group Title

SRG-APP-000247

Rule Version

EX13-MB-000190

Severity

CAT III

CCI(s)

• CCI-001095 - The information system manages excess capacity, bandwidth, or other redundancy to limit the effects of information flooding types of denial of service attacks.

Weight

10

Fix Recommendation

Update the EDSP.

Open the Exchange Management Shell and enter the following command:

Set-ReceiveConnector -MaxHopCount 60

or

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

Repeat the procedure for each Receive connector.

Check Contents

Review the Email Domain Security Plan (EDSP).

Determine the value for Receive connectors.

Open the Exchange Management Shell and enter the following command:

Get-ReceiveConnector | Select Name, MaxHopCount

For each Receive connector, if the value of MaxHopCount is not set to 60, this is a finding.

or

If the value of MaxHopCount is set to a value other than 60 and has signoff and risk acceptance in the EDSP, this is not a finding.

Vulnerability Number

V-207304

Documentable

False

Rule Version

EX13-MB-000190

Severity Override Guidance

Review the Email Domain Security Plan (EDSP).

Determine the value for Receive connectors.

Open the Exchange Management Shell and enter the following command:

Get-ReceiveConnector | Select Name, MaxHopCount

For each Receive connector, if the value of MaxHopCount is not set to 60, this is a finding.

or

If the value of MaxHopCount is set to a value other than 60 and has signoff and risk acceptance in the EDSP, this is not a finding.

Check Content Reference

M

Target Key

2923

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