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Here are the CLI commands to check for the firewall misconfigurations described in the report: --- 1. Check for Firewall INGRESS Rule Allowing Public Access (0.0.0.0/0) to a Sensitive Port CLI Command: gcloud compute firewall-rules list --filter="direction=INGRESS AND sourceRanges:0.0.0.0/0 AND (allowed:tcp:22 OR allowed:tcp:3389)" Explanation: This command filters for INGRESS rules that allow access from all IPs (0.0.0.0/0) to sensitive ports like SSH (22) and RDP (3389). --- 2. Check for Firewall Rule Allowing a Broad Port Range CLI Command: gcloud compute firewall-rules list --filter="direction=INGRESS AND sourceRanges:0.0.0.0/0 AND allowed:tcp" --format="table(name, allowed, sourceRanges)" Explanation: This command lists all INGRESS rules with a source of 0.0.0.0/0 and allowed TCP ports. The output can be used to identify rules with broad port ranges like tcp:0-65535 or large port ranges. --- 3. Check for Firewall Rule Allowing Public Access (0.0.0.0/0) CLI Command: gcloud compute firewall-rules list --filter="sourceRanges:0.0.0.0/0" Explanation: This command checks for firewall rules that allow public access from 0.0.0.0/0 for any ports, exposing resources to the public internet. --- 4. Check for Firewall Rule Opening All Ports (0-65535) CLI Command: gcloud compute firewall-rules list --filter="allowed:tcp:0-65535 AND sourceRanges:0.0.0.0/0" Explanation: This command filters firewall rules that allow all TCP ports (tcp:0-65535) to be accessed from any IP (0.0.0.0/0), exposing all services. --- General Command for Listing All Firewall Rules To list all firewall rules and check for any issues manually: gcloud compute firewall-rules list --format="table(name, direction, sourceRanges, allowed)" This will list all firewall rules with their name, direction, source ranges, and allowed ports, allowing for manual inspection of any misconfigurations. --- These commands will allow you to check for the existence of the misconfigurations mentioned in the report without creating new issues.
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