TMA-IBMCLOUD-9.5
Ensure no workspace network security groups allow inbound traffic from the Internet from 0.0.0.0/0 to any administrative ports
Mô tả
It is recommended that inbound traffic from the Internet to administrative ports is restricted, following the principle of least privilege access. These ports are RDP (3389), SSH (22), VNC (Listener: 5500, Server: 5900) and RPC (135, 111). Removing unrestricted connectivity from the Internet to administrative services, such as SSH, reduces a PowerVS resources risk exposure.
Cách kiểm tra
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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 3389, 22, 5500, 5900, 135 or 111 and has a Source of 0.0.0.0/0.
Cách khắc phục
Phương pháp khắc phục: Hướng dẫn hoặc bản vá hạ tầng
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.
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- CIS IBM Cloud Foundations Benchmark v2.0.0 - 9.5 Ensure no workspace network security groups allow inbound traffic from the Internet from 0.0.0.0/0 to any administrative ports