Detections
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1.70 RHEL-10-200692

Information

RHEL 10 must be configured to prevent unrestricted mail relaying.

GROUP ID: V-280999
RULE ID: SV-280999r1165352

If unrestricted mail relaying is permitted, unauthorized senders could use this host as a mail relay to send spam or for other unauthorized activity.

Solution

Configure RHEL 10 so that the postfix configuration file restricts client connections to the local network with the following command:

$ sudo postconf -e 'smtpd_client_restrictions = permit_mynetworks,reject'

See Also

https://workbench.cisecurity.org/benchmarks/26403

Item Details

Category: CONFIGURATION MANAGEMENT

References: 800-53|CM-7, 800-53|CM-7a., CAT|II, CCI|CCI-000381, Rule-ID|SV-280999r1165352_rule, STIG-ID|RHEL-10-200692, Vuln-ID|V-280999

Plugin: Unix

Control ID: 7b924b972ade71b631994b3084273b67d952549b36160755dc7a860e90da7c60