Ensure no workspace network security groups allow inbound traffic from the Internet from 0.0.0.0/0 to any infrastructure ports

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Descripción

It is recommended that inbound traffic from the Internet to high-risk ports is restricted, following the principle of least privilege access. The ports specified in this control are DNS (53), POP3 (110), SMTP (25). DHCP (67, 68), SNMP (161, 162). Removing unrestricted inbound connectivity from the Internet to infrastructure ports and services, such as DNS and DHCP, reduces PowerVS resources’ exposure to risk.

Cómo se verifica

Método de auditoría: Revisión manual

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Perform the following tasks to determine if the account is configured as prescribed: 1. Login to the IBM Cloud Portal at https://cloud.ibm.com and select Power Virtual Server user interface. 2. In the navigation panel, click Workspaces, then select the workspace that contains the Network Security Groups to review and open the Workspace details page. 3. From the workspace details page, click view virtual servers. 4. In the left navigation panel, expand Networking and then select Network security groups. For each NSG perform the following: a. Select the access control list name b. Ensure no Inbound Rule exists that has a port range that includes ports 53,110, 25, 67, 68, 161 or 162 and has a Source of 0.0.0.0/0.

Cómo se corrige

Método de corrección: Guía o parche de infraestructura

1. Login to the IBM Cloud Portal at https://cloud.ibm.com and select Power Virtual Server user interface. 2. In the navigation panel, click Workspaces, then select the workspace that contains the Network Security Groups to review and open the Workspace details page. 3. From the workspace details page, click view virtual servers. 4. For each network security group, perform the following: a. Select the network security group name. b. Identify the Inbound rule to be removed, then select Delete.

Propiedades

Sistemas operativos: Cualquiera
Etiquetas: cloudibmcloudnetwork
Referencia: CIS IBM Cloud Foundations Benchmark v2.0.0 - 9.4 Ensure no workspace network security groups allow inbound traffic from the Internet from 0.0.0.0/0 to any infrastructure ports