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V-259630

CAT II (Medium)

Exchange must limit the Receive connector timeout.

Rule ID

SV-259630r1043182_rule

STIG

Microsoft Exchange 2019 Edge Server Security Technical Implementation Guide

Version

V2R2

CCIs

CCI-002361

Discussion

Email system availability depends in part on best practices strategies for setting tuning. This configuration controls the number of idle minutes before the connection is dropped. It works in conjunction with the Maximum Inbound Connections Count setting.

Check Content

Review the Email Domain Security Plan (EDSP), or Organizations applicable documentation.

Determine the connection Timeout value.

Open the Exchange Management Shell and enter the following command:

Get-ReceiveConnector | Select-Object -Property Name, Identity, ConnectionTimeout

For each Receive connector, if the value of "ConnectionTimeout" is not set to "00:05:00", this is a finding.

If "ConnectionTimeout" is set to another value other than "00:05:00" and has signoff and risk acceptance in the EDSP, this is not a finding.

Fix Text

Update the EDSP, or the applicable documentation.

Open the Exchange Management Shell and enter the following command:

Set-ReceiveConnector -Identity <'IdentityName'> -ConnectionTimeout 00:05:00

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

or

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

Repeat the procedures for each Receive connector.