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

The Exchange Outbound Connection Timeout must be 10 minutes or less.

DISA Rule

SV-207312r615936_rule

Vulnerability Number

V-207312

Group Title

SRG-APP-000247

Rule Version

EX13-MB-000230

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-SendConnector -Identity <'IdentityName'> -ConnectionInactivityTimeOut 00:10:00

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

or

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

Check Contents

Review the Email Domain Security Plan (EDSP).

Determine the Connection Timeout value.

Open the Exchange Management Shell and enter the following command:

Get-SendConnector | Select Name, Identity, ConnectionInactivityTimeOut

For each Send connector, if the value of ConnectionInactivityTimeOut is not set to 00:10:00, this is a finding.

or

If ConnectionInactivityTimeOut is set to other than 00:10:00 and has signoff and risk acceptance in the EDSP, this is not a finding.

Vulnerability Number

V-207312

Documentable

False

Rule Version

EX13-MB-000230

Severity Override Guidance

Review the Email Domain Security Plan (EDSP).

Determine the Connection Timeout value.

Open the Exchange Management Shell and enter the following command:

Get-SendConnector | Select Name, Identity, ConnectionInactivityTimeOut

For each Send connector, if the value of ConnectionInactivityTimeOut is not set to 00:10:00, this is a finding.

or

If ConnectionInactivityTimeOut is set to other than 00:10:00 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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