STIGQter 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 Limit per Domain Count must be controlled.

DISA Rule

SV-207311r615936_rule

Vulnerability Number

V-207311

Group Title

SRG-APP-000247

Rule Version

EX13-MB-000225

Severity

CAT III

CCI(s)

Weight

10

Fix Recommendation

Update the EDSP.

Open the Exchange Management Shell and enter the following command:

Set-TransportService -Identity <'IdentityName'> -MaxPerDomainOutboundConnections 20

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 value for Maximum Domain Connections

Open the Exchange Management Shell and enter the following command:

Get-TransportService | Select Name, Identity, MaxPerDomainOutboundConnections

If the value of MaxPerDomainOutboundConnections is not set to 20, this is a finding.

or

If the value of MaxPerDomainOutboundConnections is set to a value other than 20 and has signoff and risk acceptance in the EDSP, this is not a finding.

Vulnerability Number

V-207311

Documentable

False

Rule Version

EX13-MB-000225

Severity Override Guidance

Review the Email Domain Security Plan (EDSP).

Determine the value for Maximum Domain Connections

Open the Exchange Management Shell and enter the following command:

Get-TransportService | Select Name, Identity, MaxPerDomainOutboundConnections

If the value of MaxPerDomainOutboundConnections is not set to 20, this is a finding.

or

If the value of MaxPerDomainOutboundConnections is set to a value other than 20 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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