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

Exchange Outbound Connection Limit per Domain Count must be controlled.

DISA Rule

SV-221221r612603_rule

Vulnerability Number

V-221221

Group Title

SRG-APP-000247

Rule Version

EX16-ED-000200

Severity

CAT II

CCI(s)

Weight

10

Fix Recommendation

Update the EDSP to reflect the value for Maximum Domain Connections.

Open the Exchange Management Shell and enter the following command:

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

Note: The <IdentityName> value must be in single 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-221221

Documentable

False

Rule Version

EX16-ED-000200

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

4079

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