The ESXi host must configure the firewall to block network traffic by default.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-258769 | ESXI-80-000214 | SV-258769r933368_rule | CCI-000366 | medium |
| Description | ||||
| In addition to service-specific firewall rules, ESXi has a default firewall rule policy to allow or deny incoming and outgoing traffic. Reduce the risk of attack by ensuring this is set to deny incoming and outgoing traffic. | ||||
| STIG | Date | |||
| VMware vSphere 8.0 ESXi Security Technical Implementation Guide | 2023-10-11 | |||
Related Frameworks
4 paths across 3 frameworks
Related Frameworks
NIST 800-531 mapping
CM-6
1.00
- DISA · V1R1 · disa_xccdf · related
- DISA · 2025-01-23 · disa_cci_list · equivalent
NIST 800-1712 mappings
3.4.1
1.00
- DISA · V1R1 · disa_xccdf · related
- DISA · 2025-01-23 · disa_cci_list · equivalent
- NIST · Rev 2 (Feb 2020, errata Jan 2021) · nist_800_171_app_d · equivalent
3.4.2
1.00
- DISA · V1R1 · disa_xccdf · related
- DISA · 2025-01-23 · disa_cci_list · equivalent
- NIST · Rev 2 (Feb 2020, errata Jan 2021) · nist_800_171_app_d · equivalent
CCI1 mapping
CCI-000366
1.00
- DISA · V1R1 · disa_xccdf · related
Details
Check Text (C-258769r933368_chk)
From an ESXi shell, run the following command:
# esxcli network firewall get
If the "Default Action" does not equal "DROP", this is a finding.
If "Enabled" does not equal "true", this is a finding.
or
From a PowerCLI command prompt while connected to the ESXi host, run the following command:
Get-VMHostFirewallDefaultPolicy
If the Incoming or Outgoing policies are "True", this is a finding.
Fix Text (F-62418r933367_fix)
From an ESXi shell, run the following command:
# esxcli network firewall set --default-action=false
or
From a PowerCLI command prompt while connected to the ESXi host, run the following command:
Get-VMHostFirewallDefaultPolicy | Set-VMHostFirewallDefaultPolicy -AllowIncoming $false -AllowOutgoing $false