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Nutanix OS must manage excess capacity, bandwidth, or other redundancy to limit the effects of information flooding types of denial-of-service (DoS) attacks.

Overview

Finding IDVersionRule IDIA ControlsSeverity
V-279625NXAC-OS-000198SV-279625r1192338_ruleCCI-001095medium
Description
DoS is a condition when a resource is not available for legitimate users. When this occurs, the organization either cannot accomplish its mission or must operate at degraded capacity. Managing excess capacity ensures that sufficient capacity is available to counter flooding attacks. Employing increased capacity and service redundancy may reduce the susceptibility to some DoS attacks. Managing excess capacity may include, for example, establishing selected usage priorities, quotas, or partitioning.
STIGDate
Nutanix Acropolis GPOS Security Technical Implementation Guide2026-02-24

Related Frameworks

1 mapping across 4 frameworks
SCF0 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (2) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

CAP-02Resource Priority
0.50
CAP-03Capacity Planning
0.50
NIST 800-530 mappings

No source states a mapping between these directly.

Also reachable in 2 hops (13) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

AC-17(10)Authenticate Remote Commands
1.00
AC-17(9)Disconnect or Disable Access
1.00
AC-3Access Enforcement
1.00
AC-4Information Flow Enforcement
1.00
AU-3Content of Audit Records
1.00
CM-6Configuration Settings
1.00
CM-7Least Functionality
1.00
CM-7(2)Prevent Program Execution
1.00
SC-47Alternate Communications Paths
1.00
SC-5Denial-of-service Protection
1.00

+3 more (top 10 by confidence shown)

CCI1 mapping
CCI-001095
1.00
NIST CSF 2.00 mappings

No source states a mapping between these directly.

Also reachable in 4 hops (1) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

PR.IR-04
0.50

Details

Check Text (C-279625r1192338_chk)

Verify Nutanix OS is configured to use syncookies. 1. For AOS, Prism Central, and Files, verify the saved value of TCP syncookies using the following command. $ sudo grep -i net.ipv4.tcp_syncookies /etc/sysctl.conf /etc/sysctl.d/* | grep -v '#' /etc/sysctl.d/99-salt.conf:net.ipv4.tcp_syncookies = 1 2. Verify AHV is configured to use syncookies using the following command. $ sysctl net.ipv4.tcp_syncookies net.ipv4.tcp_syncookies = 1 $ sudo grep -i net.ipv4.tcp_syncookies /etc/sysctl.conf /etc/sysctl.d/* | grep -v '#' If the value of syncookies is not set to "1", this is a finding.

Fix Text (F-84083r1192337_fix)

Set the value of syncookies to 1. 1. For AOS, run the following command. $ sudo salt-call state.sls security/CVM/iptables/init 2. For Prism Central, run the following command. $ sudo salt-call state.sls security/PCVM/iptables/init 3. For Files, run the following command. $ sudo salt-call state.sls security/AFS/iptables/init 4. For AHV, configure Nutanix AHV to use TCP syncookies using the following command. $ sudo sysctl -w net.ipv4.tcp_syncookies=1 If "1" is not the system's default value, add or update the following line in "/etc/sysctl.conf": net.ipv4.tcp_syncookies = 1