Remote Desktop Gateway is necessary to make RemoteApp programs available from the Internet. It acts as the gateway that RDP connections from an external network used to connect to a remote desktop server (Terminal Server) which is on a corporate/private network. This article shows you what to do if the Remote Desktop Gateway server is temporarily unavailable.

What is a Remote Desktop Gateway?

Remote Desktop Gateway (RDG or RD Gateway) is a role in Windows Server that establishes a connection to the server encrypted with SSL via Remote Desktop Protocol (RDP). Microsoft Remote Desktop Protocol (RDP) enables remote desktops to connect to computers. RDP is a widely implemented, easy-to-understand protocol and is a built-in service of most versions of Windows. However, faulty encryption mechanisms in older versions of RDP and lack of access controls made RDP vulnerable and an easy entry point for malware. This is why Remote Desktop Gateway improves control by eliminating all remote user access to the system. RDG replaces this access with point-to-point protocol (PPP) for remote desktop connection. If you do not set everything up appropriately, you might face errors such as the Remote Desktop Gateway server being temporarily unavailable.

What can I do if the Remote Desktop Gateway Server is temporarily unavailable?

1. Turn of Windows Firewall

Proxy settings, firewall, routing, or DNS issues can block proper communication between client and Remote Desktop Gateway. Make sure your client and Remote Desktop Gateway can connect effortlessly to avoid facing the Remote Desktop Gateway Server is temporarily unavailable error.

2. Verify that the Remote Desktop Gateway Server’s FDQN resolves to the correct IP

The Remote Desktop Gateway server is temporarily unavailable error can be because your server name defaults to a local computer name. The computer trying to connect must be able to resolve the public name of the RDG server. This may not be the hostname of the server.

3. Check the SSL certificate

RDG uses SSL to securely encrypt the connection. Configurations of your host (Cloudflare, etc.) can mess your SSL certificate up. SPONSORED Check your SSL certificate and also make sure it is not expired. Sometimes, the Remote Desktop Gateway server is temporarily unavailable error is caused by a faulty SSL certificate.

4. Check for multiple Site Bindings to port 443 in IIS on the Remote Desktop Gateway server

How secure is a VPN compared to a Remote Desktop Gateway?

Once set up properly, Remote Desktop Gateway enables remote users to connect to internal network resources outside of your firm. This means that there is no need for a Virtual Private Network (VPN). Using a VPN connection adds another layer of protection to your RDP connections. If a criminal penetrates a midway Internet Exchange Point (IXP) and watches every piece of data coming through, all they can access is the encrypted version of the data. Whilst enhancing security, there are drawbacks of using VPN without any additional access controls. If an attacker steals a user’s login credentials, they will be able to breach the VPN and then gain access to all the data. Also, VPNs open up access to a large group of users all at once. However, in practice, IT teams often need to tailor permissions to an individual user. VPNs are not a way of offering granular access control. If you’re looking for a reliable VPN, check out this article. The Remote Desktop Gateway server is temporarily unavailable error is one of the errors you might face while using Windows servers. You might face other errors such as Your computer can’t connect to the remote computer because an error occurred on the remote computer that you want to connect to. Properly installing and setting up the Remote Desktop Gateway is not something you want to overlook. If you were able to resolve the Remote Desktop Gateway Server is temporarily unavailable issue, please let us know in the comments section below.

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