--- title: "[GSP322] Build and Secure Networks in Google Cloud: Challenge Lab" description: "" summary: "Quest: Build and Secure Networks in Google Cloud" date: 2023-05-26T01:08:03+07:00 draft: false author: "Hiiruki" # ["Me", "You"] # multiple authors tags: ["writeups", "challenge", "google-cloudskillsboost", "gsp322", "google-cloud", "cloudskillsboost", "juaragcp", "google-cloud-platform", "gcp", "cloud-computing", "firewall", "ssh", "bastion-host", "vpc", "iap"] canonicalURL: "" showToc: true TocOpen: false TocSide: 'right' # or 'left' weight: 10 # aliases: ["/first"] hidemeta: false comments: false disableHLJS: true # to disable highlightjs disableShare: true hideSummary: false searchHidden: false ShowReadingTime: true ShowBreadCrumbs: true ShowPostNavLinks: true ShowWordCount: true ShowRssButtonInSectionTermList: true # UseHugoToc: true cover: image: "" # image path/url alt: "" # alt text caption: "" # display caption under cover relative: false # when using page bundles set this to true hidden: true # only hide on current single page # editPost: # URL: "https://github.com/hiiruki/hiiruki.dev/blob/main/content/writeups/google-cloudskillsboost/GSP322/index.md" # Text: "Suggest Changes" # edit text # appendFilePath: true # to append file path to Edit link --- ### GSP322 ![Lab Banner](https://cdn.qwiklabs.com/GMOHykaqmlTHiqEeQXTySaMXYPHeIvaqa2qHEzw6Occ%3D#center) - Time: 1 hour
- Difficulty: Advanced
- Price: 7 Credits Lab: [GSP322](https://www.cloudskillsboost.google/focuses/12068?parent=catalog)
Quest: [Build and Secure Networks in Google Cloud](https://www.cloudskillsboost.google/quests/128)
## Setup Define the environment variables: ```bash export IAP_NETWORK_TAG= export INTERNAL_NETWORK_TAG= export HTTP_NETWORK_TAG= export ZONE= ``` Fill the variables with the values from the lab For the zone you can check first. In the console, click the **Navigation menu** > **Compute Engine** > **VM Instance**. In my case I used `us-east1-b` ![SSH to bastion](./images/vm_instances.webp#center) To list all available zones: ```bash gcloud compute zones list ``` Reference: [gcloud compute zones list](https://cloud.google.com/sdk/gcloud/reference/compute/zones/list) ![Lab Variable](./images/lab_variable.webp#center) For example in my case: ```bash export IAP_NETWORK_TAG=allow-ssh-iap-ingress-ql-901 export INTERNAL_NETWORK_TAG=allow-ssh-internal-ingress-ql-803 export HTTP_NETWORK_TAG=allow-http-ingress-ql-982 export ZONE=us-east1-b ``` ## Challenge scenario You are a security consultant brought in by Jeff, who owns a small local company, to help him with his very successful website (juiceshop). Jeff is new to Google Cloud and had his neighbour's son set up the initial site. The neighbour's son has since had to leave for college, but before leaving, he made sure the site was running. You need to help out Jeff and perform appropriate configuration for security. Below is the current situation: ![juiceshop configuration diagram](https://cdn.qwiklabs.com/qEwFTP7%2FkyF3cRwfT3FGObt7L7VLB60%2Bvp92hZVnogw%3D) ## Your challenge You need to configure this simple environment securely. Your first challenge is to set up appropriate firewall rules and virtual machine tags. You also need to ensure that SSH is only available to the bastion via IAP. For the firewall rules, make sure: - The bastion host does not have a public IP address. - You can only SSH to the bastion and only via IAP. - You can only SSH to juice-shop via the bastion. - Only HTTP is open to the world for `juice-shop`. Tips and tricks: - Pay close attention to the network tags and the associated VPC firewall rules. - Be specific and limit the size of the VPC firewall rule source ranges. - Overly permissive permissions will not be marked correct. ![juiceshop configuration diagram 2](https://cdn.qwiklabs.com/BgxgsuLyqMkhxmO3jDlkHE7yGLIR%2B3rrUabKimlgrbo%3D) Suggested order of actions: 1. Check the firewall rules. Remove the overly permissive rules. ```bash gcloud compute firewall-rules delete open-access ``` Press `y` and `enter` to confirm. 2. Navigate to Compute Engine in the Cloud Console (**Navigation menu** > **Compute Engine** > **VM Instance**) and identify the bastion host. The instance should be stopped. Start the instance. ```bash gcloud compute instances start bastion --zone=$ZONE ``` If you getting **_error_** when run this command, you can manually activate bastion in VM Instance. 3. The bastion host is the one machine authorized to receive external SSH traffic. Create a firewall rule that allows [SSH (tcp/22) from the IAP service](https://cloud.google.com/iap/docs/using-tcp-forwarding). The firewall rule must be enabled for the bastion host instance using a network tag of `SSH_IAP_NETWORK_TAG`. ```bash gcloud compute firewall-rules create ssh-ingress --allow=tcp:22 --source-ranges 35.235.240.0/20 --target-tags $IAP_NETWORK_TAG --network acme-vpc gcloud compute instances add-tags bastion --tags=$IAP_NETWORK_TAG --zone=$ZONE ``` 4. The `juice-shop` server serves HTTP traffic. Create a firewall rule that allows traffic on HTTP (tcp/80) to any address. The firewall rule must be enabled for the juice-shop instance using a network tag of `HTTP_NETWORK_TAG`. ```bash gcloud compute firewall-rules create http-ingress --allow=tcp:80 --source-ranges 0.0.0.0/0 --target-tags $HTTP_NETWORK_TAG --network acme-vpc gcloud compute instances add-tags juice-shop --tags=$HTTP_NETWORK_TAG --zone=$ZONE ``` 5. You need to connect to `juice-shop` from the bastion using SSH. Create a firewall rule that allows traffic on SSH (tcp/22) from `acme-mgmt-subnet` network address. The firewall rule must be enabled for the `juice-shop` instance using a network tag of `SSH_INTERNAL_NETWORK_TAG`. ```bash gcloud compute firewall-rules create internal-ssh-ingress --allow=tcp:22 --source-ranges 192.168.10.0/24 --target-tags $INTERNAL_NETWORK_TAG --network acme-vpc gcloud compute instances add-tags juice-shop --tags=$INTERNAL_NETWORK_TAG --zone=$ZONE ``` 6. In the Compute Engine instances page, click the SSH button for the **bastion** host. ![SSH to bastion](./images/vm_instances.webp#center) Once connected, SSH to `juice-shop`. ```bash gcloud compute ssh juice-shop --internal-ip ``` When prompted `Do you want to continue (Y/n)?`, press `y` and `enter`. Then create a phrase key for the `juice-shop` instance. You can just press `enter` for the empty passphrase. When prompted `Did you mean zone [us-east1-b] for instance: [juice-shop] (Y/n)?`, press `y` and `enter`. ![SSH to juice-shop](./images/bastion_ssh.webp#center) ## Congratulations! ![Congratulations Badge](https://cdn.qwiklabs.com/e8f4BCFobRlvdqoJ1D%2BHGeJeS9yToL4ZVT3Tg6oeg7Y%3D#center)