Microsoft Exchange 2019 Edge Server Security Technical Implementation Guide
Rules, Groups, and Values defined within the XCCDF Benchmark
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SRG-APP-000131
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SRG-APP-000141
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SRG-APP-000141
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Exchange Send Fatal Errors to Microsoft must be disabled.
It is detrimental for applications to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and...Rule Medium Severity -
SRG-APP-000211
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SRG-APP-000213
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SRG-APP-000219
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Exchange internal send connectors must use domain security (mutual authentication Transport Layer Security).
The Simple Mail Transfer Protocol (SMTP) connector is used by Exchange to send and receive messages from server to server. Several controls work together to provide security between internal server...Rule Medium Severity -
SRG-APP-000219
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Exchange internet-facing receive connectors must offer Transport Layer Security (TLS) before using basic authentication.
Sending unencrypted email over the internet increases the risk that messages can be intercepted or altered. TLS is designed to protect confidentiality and data integrity by encrypting email message...Rule Medium Severity -
SRG-APP-000246
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More than one Edge server must be deployed.
To ensure hostile insiders are unable to easily commit DoS attacks and reduce the effectiveness of mail flow throughout the environment, a second Edge server is deployed to allow for multiple paths...Rule Medium Severity -
SRG-APP-000247
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SRG-APP-000247
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Exchange Outbound Connection limit per Domain Count must be controlled.
Email system availability depends in part on best practice strategies for setting tuning configurations. This configuration controls the maximum number of simultaneous outbound connections from a d...Rule Medium Severity -
SRG-APP-000247
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Exchange receive connector maximum hop count must be 60.
Email system availability depends in part on best practice strategies for setting tuning configurations. This setting controls the maximum number of hops (email servers traversed) a message may tak...Rule Medium Severity -
SRG-APP-000247
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Exchange receive connectors must control the number of recipients per message.
Email system availability depends in part on best practice strategies for setting tuning configurations. This configuration controls the maximum number of recipients who will receive a copy of a ...Rule Medium Severity -
SRG-APP-000247
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Node 2
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