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

中级别 1人工审核ibmcloud

说明

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.

检查方式

审计方法: 人工审核

此项建议无法自动检查。当您传入 --include-manual 时，扫描结果会列出该项并附带这些说明。

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.

修复方式

修复方法: 操作指南或基础设施补丁

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.

属性

操作系统: 任意
标签: cloudibmcloudnetwork
参考: 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