STIGQter STIGQter: STIG Summary: Microsoft Exchange 2019 Edge Server Security Technical Implementation Guide Version: 2 Release: 2 Benchmark Date: 30 Jan 2025:

Exchange Outbound Connection limit per Domain Count must be controlled.

DISA Rule

SV-259598r961155_rule

Vulnerability Number

V-259598

Group Title

SRG-APP-000247

Rule Version

EX19-ED-000111

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 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-Object -Property 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-259598

Documentable

False

Rule Version

EX19-ED-000111

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-Object -Property 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

5579