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The Datagram Congestion Control Protocol (DCCP) must be disabled unless required.


Finding ID Version Rule ID IA Controls Severity
V-217934 RHEL-06-000124 SV-217934r505923_rule Medium
Disabling DCCP protects the system against exploitation of any flaws in its implementation.
Red Hat Enterprise Linux 6 Security Technical Implementation Guide 2020-09-03


Check Text ( C-19415r462394_chk )
If the system is configured to prevent the loading of the "dccp" kernel module, it will contain lines inside any file in "/etc/modprobe.d" or the deprecated"/etc/modprobe.conf". These lines instruct the module loading system to run another program (such as "/bin/true") upon a module "install" event. Run the following command to search for such lines in all files in "/etc/modprobe.d" and the deprecated "/etc/modprobe.conf":

$ grep -r dccp /etc/modprobe.conf /etc/modprobe.d | grep -i “/bin/true”| grep -v “#”

If no line is returned, this is a finding.
Fix Text (F-19413r462395_fix)
The Datagram Congestion Control Protocol (DCCP) is a relatively new transport layer protocol, designed to support streaming media and telephony. To configure the system to prevent the "dccp" kernel module from being loaded, add the following line to a file in the directory "/etc/modprobe.d":

install dccp /bin/true