Ensure That RDP Access Is Restricted From the Internet

中级别 2人工审核gcp

说明

GCP Firewall Rules are specific to a VPC Network. Each rule either allows or denies traffic when its conditions are met. Its conditions allow users to specify the type of traffic, such as ports and protocols, and the source or destination of the traffic, including IP addresses, subnets, and instances. Firewall rules are defined at the VPC network level and are specific to the network in which they are defined. The rules themselves cannot be shared among networks. Firewall rules only support IPv4 traffic. When specifying a source for an ingress rule or a destination for an egress rule by address, an IPv4 address or IPv4 block in CIDR notation can be used. Generic (0.0.0.0/0) incoming traffic from the Internet to a VPC or VM instance using RDP on Port 3389 can be avoided. GCP Firewall Rules within a VPC Network. These rules apply to outgoing (egress) traffic from instances and incoming...

检查方式

审计方法: 人工审核

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From Google Cloud Console 1. Go to VPC network. 2. Go to the Firewall Rules. 3. Ensure Port is not equal to 3389 and Action is not Allow. 4. Ensure IP Ranges is not equal to 0.0.0.0/0 under Source filters. From Google Cloud CLI gcloud compute firewall-rules list -- format=table'(name,direction,sourceRanges,allowed)' Ensure that there is no rule matching the below criteria: - SOURCE_RANGES is 0.0.0.0/0 - AND DIRECTION is INGRESS - AND IPProtocol is TCP or ALL - AND PORTS is set to 3389 or range containing 3389 or Null (not set) Note: - When ALL TCP ports are allowed in a rule, PORT does not have any value set (NULL) - When ALL Protocols are allowed in a rule, PORT does not have any value set (NULL)

修复方式

修复方法: 操作指南或基础设施补丁

From Google Cloud Console 1. Go to VPC Network. 2. Go to the Firewall Rules. 3. Click the Firewall Rule to be modified. 4. Click Edit. 5. Modify Source IP ranges to specific IP. 6. Click Save. From Google Cloud CLI 1.Update RDP Firewall rule with new SOURCE_RANGE from the below command: gcloud compute firewall-rules update FirewallName --allow=[PROTOCOL[:PORT[- PORT]],...] --source-ranges=[CIDR_RANGE,...]

属性

操作系统: 任意
标签: access-controlcloudgcp
参考: CIS Google Cloud Platform Foundation Benchmark v5.0.0 - 3.7 Ensure That RDP Access Is Restricted From the Internet