![]() Specify the internal DNS name as the target RD (click to enlarge)įinally, in the RDG settings, use the external name (that is, the A record) name of the RD gateway server. Here, I am using Devolutions’ Remote Desktop Manager which is an excellent RDP client. Here you see that I use the subdomain “internal” as a convention to refer to an instance by its VPC private address. An EC2 instance with both an internal and external DNS entry (click to enlarge) Thanks to the fact that it’s a different resolved name, it finds…itself!įirst, set up an internal CNAME reference for the RDG and a an external A record for the same instance using the EIP for the instance. The RDG then looks for an internal address, resolved by Route 53, that’s listening on port 3389. Incoming requests go to the external EIP address on port 443 (which, of course, you have to open in the security group for the public subnet). Simply put, your RDG jump host connects to itself. To get around this limitation, we can use the fact that a single network interface in Windows Server EC2 instance can respond on both an internal, non-routable subnet IP addresses as well as a public, routable EIP address. (Actually, all access to the EC2 instance is on the private IP address because it’s “behind” an invisible VPC router.) But be honest - you’ll forget to close 3389 and then you have a port open that you are trying to keep closed. This is clunky if you ask me: you can close port 3389 to the public subnet only if you never need to access the server on which the Remote Desktop Gateway is running. Sure, you could open it temporarily just to apply maintenance, configure the gateway and/or restart it. See this documentation for an illustration of what AWS recommends in this regard.īut this design for Windows jump hosts introduces a security issue: if you want to access the RD gateway server itself via the public subnet you must open port 3389 in the security group and/or the network ACL. A public VPC subnet differs from a private subnet in two crucial ways: a public subnet has both a route to a VPC internet gateway (IGW) and instances which have been assigned an elastic IP (EIP). ![]() Update : See this post for a DevOps approach to configuring a Windows jump server.ĪWS’s recommendation to address this exposure (as well as exposure on other ports) is to put Windows Servers inside a private subnet (which isolates them from the Internet) and set up a Windows Server Remote Desktop Gateway (RDG) bastion host (aka, jumper server) in a public subnet. RDP runs on TCP port 3389 and because this port is so well-known, it is a favorite port for attacks and is one of the first ports a security-conscious admin wants to close. As any Windows Server admin knows, the remote desktop protocol (RDP) is an essential tool in maintaining Windows. This post details how to set up a bastion host, or jump server, for Windows in AWS EC2. The WVD VMs are Windows 10 based, you can do a lot of things with GPOs.An EC2 instance with both an internal and external DNS entry (click to enlarge) Is there an article that explains how to deploy hardened WVD for security reasons.īasically "hardening the WVD VMs" is possible. There is no option to use WVD VMs non-domain joined. what are the implications of having it non-domain joined?Ĭurrently it's mandatory to domain join the WVD VMs. ![]() Is it good practice to have WVD as Domain-joined device because you are allowing internet connections and that would make more attack surface if compromised. You can use "forced tunneling" to send any traffic from WVD infrastructure in the corporate network: How to allow only egress traffic from WVD into specific vm/ devices in the corporate network? This authentication could also include/require MFA. But authentication is required to get access to the WVD environment. The Azure Windows Virtual Desktop infrastructure allows connections from any public internet connection. How to allow only ingress traffic from vendors coporate network to WVD instead of allowing any public connections such as public wifi?Īs far as I know this is not poosible.
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