![]() outputs.tf – Defines the output variables to be returned from main.tf.terraform.tfvars – Supplies values for the input variables defined in variables.tf.variables.tf – Defines the input variables that will be used in main.tf.main.tf – Contains the primary Terraform code to complete the steps mentioned above.To get started, clone the example repo with git clone, then change to the gcve-bastion-iap sub-directory. Once connected to the bastion host, you will be able to log into your GCVE-based vSphere portal. Set a password on the bastion host using the gcloud toolĪfter Terraform completes configuration, you will be able to use the gcloud tool to enable TCP forwarding for RDP.Create firewall rules for accessing the bastion host via IAP, and accessing resources from the bastion host.Create Windows 2019 Server instance, which will be used as a bastion host.Create a service account, which will be associated with the bastion host.The example Terraform code linked at the beginning of the post will do the following: This rule can be further limited to specific TCP ports, like 3389 for RDP or 22 for SSH. The VPC firewall will need to allow traffic sourced from 35.235.240.0/20, which is the range that IAP uses for TCP forwarding. Project IAM Admin ( roles/resourcemanager.projectIamAdmin).Service Networking Admin ( roles/worksAdmin).IAP-secured Tunnel User ( roles/iap.tunnelResourceAccessor).IAP settings Admin ( roles/iap.settingsAdmin).Service Account User ( roles/iam.serviceAccountUser).Service Account Admin ( roles/iam.serviceAccountAdmin).Otherwise, you will need the following roles assigned to complete the tasks outlined in the rest of this post: If you have Owner permissions in your GCP project, then you’re good to go. Configuring this feature will require some specific IAM roles, as well as some firewall rules in your VPC. Once configured, IAP will allow us to establish a connection to our bastion host over an encrypted tunnel on demand. Accessing the bastion host over RDP (TCP port 3389) will be accomplished using IAP for TCP forwarding. IAP can be used to access various resources, including App Engine and GKE. I am a massive fan of this approach, and while there are some tradeoffs to discuss, it is a simpler and more secure approach than traditional access methods. Using IAP means that the bastion host will be accessible without having to configure a VPN or expose it to the internet. I walked through the steps to deploy a client VPN in Deploying a GCVE SDDC with HCX, but this post will show how to use IAP as a method for accessing a new bastion host. Standing up initial cloud connectivity is challenging. Common Networking Scenarios Identity Aware Proxy Overview.Everything will be deployed and configured with Terraform, with all of the code referenced in this post is available at in the gcve-bastion-iap sub-directory. Access to the bastion host will be provided with Identity-Aware Proxy (IAP). Welcome back! This post will build on the previous posts in this series by deploying a Windows Server 2019 bastion host to manage our Google Cloud VMware Engine (GCVE) SDDC.
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