Red Hat Enterprise Linux 9 Security Technical Implementation Guide
Rules, Groups, and Values defined within the XCCDF Benchmark
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SRG-OS-000096-GPOS-00050
<GroupDescription></GroupDescription>Group -
RHEL 9 must disable network management of the chrony daemon.
<VulnDiscussion>Not exposing the management interface of the chrony daemon on the network diminishes the attack space. Satisfies: SRG-OS-000...Rule Low Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
RHEL 9 systems using Domain Name Servers (DNS) resolution must have at least two name servers configured.
<VulnDiscussion>To provide availability for name resolution services, multiple redundant name servers are mandated. A failure in name resolut...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
RHEL 9 must configure a DNS processing mode set be Network Manager.
<VulnDiscussion>In order to ensure that DNS resolver settings are respected, a DNS mode in Network Manager must be configured.</VulnDiscus...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
RHEL 9 must not have unauthorized IP tunnels configured.
<VulnDiscussion>IP tunneling mechanisms can be used to bypass network filtering. If tunneling is required, it must be documented with the inf...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
RHEL 9 must be configured to prevent unrestricted mail relaying.
<VulnDiscussion>If unrestricted mail relaying is permitted, unauthorized senders could use this host as a mail relay for the purpose of sendi...Rule Medium Severity
Node 2
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