Skip to content
ATO Pathways
Log In
Overview
Search
Catalogs
SCAP
OSCAL
Catalogs
Profiles
Documents
References
Knowledge Base
Platform Documentation
Compliance Dictionary
Platform Changelog
About
Catalogs
XCCDF
Microsoft Exchange 2019 Edge Server Security Technical Implementation Guide
SRG-APP-000213
SRG-APP-000213
An XCCDF Group - A logical subset of the XCCDF Benchmark
Details
Profiles
Prose
SRG-APP-000213
1 Rule
<GroupDescription></GroupDescription>
Exchange internet-facing send connectors must specify a Smart Host.
Medium Severity
<VulnDiscussion>When identifying a "Smart Host" for the email environment, a logical send connector is the preferred method. A Smart Host acts as an internet-facing concentrator for other email servers. Appropriate hardening can be applied to the Smart Host, rather than at multiple locations throughout the enterprise. Failure to identify a Smart Host could default to each email server performing its own lookups (potentially through protective firewalls). Exchange servers should not be internet facing and should therefore not perform any Smart Host functions. When the Exchange servers are internet facing, they must be configured to identify the internet-facing server that is performing the Smart Host function.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>