You will need the thumbprint of the certificate you wish RDP to use, and the cert itself must exist in the machine’s personal store with the appropriate EKU. pfx file to start the process. "A revocation check could not be performed for the certificate." But I can't replace the certificate until I can remote in. I tried to think of all the scenarios I personally have come across in my experiences throughout the past 25 years, and I hope I didn’t miss any. There’s also a lot of misguiding information out there on the internet… Being a PKI guy myself, I thought I’d chime in a bit to help the community. Fixes an issue in Windows Server 2008 R2 in which some IIS clients cannot connect to the Remote Desktop Gateway service. Contact your network administrator for assistance. If you are receiving an error message "Your computer can't connect to the Remote Desktop Gateway server. You must be a registered user to add a comment. The server is Windows Server 2008 R2, and we are positive the SSL certificate is valid. (https://technet.microsoft.com/en-us/library/ff458357.aspx). Another way of achieving this result, and forcing machines to use a specific certificate for RDP…is via a simple WMIC command from an elevated prompt, or you can use PowerShell. We HIGHLY recommend you have an internal PKI/ADCS deployed in your environment. To get started, I’m going to break this topic up into several parts. *stifles laughter*. One little caveat though: Certificate SAN names for CNAME DNS entries. Click Tasks > Edit Deployment Properties. wmic /namespace:\\root\cimv2\TerminalServices PATH Win32_TSGeneralSetting Set SSLCertificateSHA1Hash="THUMBPRINT", $path = (Get-WmiObject -class "Win32_TSGeneralSetting" -Namespace root\cimv2\terminalservices -Filter "TerminalName='RDP-tcp'").__path, Set-WmiInstance -Path $path -argument @{SSLCertificateSHA1Hash="THUMBPRINT"}. Once I’ve got the .pfx file, I copied it over to the Gateway server and imported it to the local computer’s certificate repository. Import remote machine’s certificate into a new GPO at Computer Configuration -> Policies -> Windows Settings -> Security Settings -> Public Key Policies -> Trusted Root Certification Authorities. However, what should be done is making sure the remote computers are properly authorized in the first place. No need to push out a new certificate template. For instance, just because a machine with autoenrollment enabled acquires a computer certificate from an ADCS issuing CA, doesn’t mean RDS will use it automatically. It kind of bothers me that I get a certificate warning when I RDP into my non-domain-bound offline root CA. We also use a wildcard cert for our environment (Win 2016 Server RDS). You add more risk that way. For Single Sign On, the subject name needs to match the servers in the collection.”. See! I realize this is perhaps geared more toward Terminal Services, but for Windows systems, I would assert this is not, technically, the proper setup. And I can't remote in until I replace the certificate. And because of this, it's giving a unknown computer as the cert being presented is an internal cert, not the public cert and DNS we are using. Why not you ask? @NikkiAIT are you still having issues with this? If you've already registered, sign in. However, to enable a solution where the user can connect to the apps or desktops that you have published for them from ANY device and from ANYWHERE, then you eventually need to deploy certificates. However, this is a problem because we have terminal clients connecting (so they act more like a Windows PC using MSTSC.EXE). To get rid of the RDP error message for connecting to Windows-based computers where you already have Microsoft PKI (or some other internal PKI), it seems to me that the most effective method of eliminating the warning would be to simply add the RDP OID ("1.3.6.1.4.1.311.54.1.2" for the "Enhanced Key Usage") to an existing device/computer certificate that your PKI is already issuing to computers/devices, if you are already pushing out certificates for computers. Microsoft should be enabling the use of the certificate store for the service via GPO. But if the end users are constantly being prompted, then it sounds like those users don't trust the chain that wildcard certificate came from. Here in the fall, in the Ozark Mountains area the colors of the trees are just amazing! We have a GW, CB, and 3 SH servers. Connect and engage across your organization. Then they can avoid the prompt. However, if RDP using names still produces warning messages then let’s continue. Next, check the certificate(s) that are being used to ensure they contain the proper and accurate information. I'd focus on leveraging a SAN certificate that contains all the FQDNs of the RDS Servers. I can now no longer connect to the servers behind that gateway. The server keeps enrolling for a new RDP certificate each time it reboots and on running gpupdate /force. RDP is doing the same thing. How do we do that? Again, we use certificates to maximize security pertaining to Remote Desktop Connections and RDS. Or you will use multiple certs if you have both internal and external requirements. Windows - "Your computer can't connect to the Remote Desktop Gateway server. A hotfix is available to resolve this issue. Quick, easy, and efficient…and unless you script it out to hit all machines involved, you’ll only impact one at a time instead of using a scoped GPO. Granted, current versions of the Remote Desktop Client combined with TLS makes those types of attacks much more difficult, but there are still risks to be wary of. When it comes to WS2012 and WS2012R2 however, it gets easier and a bit less complicated. The Kerberos authentication protocol provides a mechanism for authentication — and mutual authentication — between a client and a server, or between one server and another server. Stack Exchange Network. There's no problem when connecting via RD Web Access. By using a 3rd party certificate, you're limited to a manual export/import process. And in case you’re wondering, yes…that’s a supported solution. Fix: Your Computer Can’t Connect to the Remote Desktop Gateway Server If the issue is with your Computer or a Laptop you should try using Restoro which can scan the repositories and replace corrupt and missing files. No idea where to go here especially since it is only on random computers. In the Configure the deployment window, click Certificates. Microsoft has made the needed certificate store parts available but has developed no way to utilize them with Microsoft PKI, auto-enrollment, or GPOs (outside of the Computer certificate store, short of running scripts and using registry keys). So how do we remedy that? I don’t know how many users are out there that believe that this method is correct. Furthermore, when you look at the self-signed certificate, it only has the "server authentication" enhancement, not the RDP OID. Apparently, in this new version, Windows 10 force to use Kerberos authentification to authenticate in RDG. First thing to check if warnings are occurring, is (yep, you guessed it) …are users connecting to the right name? At this point, typically this is due to the self-signed certificate each server generates for secure RDP connections isn’t trusted by the clients. To confirm the cause for this error, in the Remote Access Management console, in Step 2 Remote Access Server, click Edit, and then in the Remote Access Server Setup wizard, click OTP Certificate Templates. That resolved that issue but now i get "The remote desktop gateway server's certificate is expired or has been revoked. Translation: only the cert that came from your custom template will be used when someone connects via RDP to a machine…not the self-signed certificate. Remote Desktop Gateway history and versions. If you’ve come across this in your environment, don’t fret…as it’s a good security practice to have secure RDP sessions. If I did, please feel free to ask! I’m also going to assume that whoever is reading this knows a bit of PKI terminology. Installa l'aggiornamento KB4025334 di Windows 10 nel Gateway Desktop remoto. If only it was that easy! thanks for detailed explanations.i.e. Watch Question. I am having an issue connecting to servers through an rdp gateway. I can’t tell you how many times we’ve seen customers manually change registry settings or other hacks to avoid the warning prompts. I'm very tempted to go off on PKI hardening / best practices right now, but that is not on topic. Community to share and get the latest about Microsoft Learn. (There’s several articles that walk you through this process if you haven’t done so already - here and here). I very much appreciate this post and the details and examples are very helpful. You don’t have to manually do anything to each individual server in the deployment! Unlike the above 2 scenarios, you don’t really need special GPO settings to deploy certificates, force RDS to use specific certs, etc. Warning went POOF! I am writing this blog post to shed some light on the question of “How come we keep getting prompted warning messages about certificates when we connect to machines via RDP?” A couple of examples you might see when running the Remote Desktop Connection Client (mstsc.exe)…. 09/08/2020; 4 minutes to read; D; s; In this article. When I start the app I get: name mismatch, request remote computer:srv1.internal.domain.nl, name in certificate from remote computer: *.external.domain.nl Windows is trying to make RDP secure, doing all sorts of mutual authentication things with x.509 certificates. The Enhanced Key Usage extension has a value of either “Server Authentication” or “Remote Desktop Authentication” (1.3.6.1.4.1.311.54.1.2). RDP - 'Your computer can't connect to the remote computer because the Remote Desktop Gateway Server's certificate has expired … Regarding point (B), there is no strictly GPO-based method of getting a special certificate into the certificate store for the "Remote Desktop Services" service. Let’s say Remote Desktop Services has been fully deployed in your environment. ADCS - https://gallery.technet.microsoft.com/Windows-Server-2016-Active-165e88d1, RDS Farm - https://gallery.technet.microsoft.com/Windows-Server-2016-Remote-ffc383fe. Certificate auto-enrollment is not enabled. Additionally, security risk to your environment is elevated…especially in public sector or government environments. It’s always best to use a custom certificate template, and not the default ones. Not sure what you mean by manual process, I have a "few" RDS deployments fully automated with LetsEncrypt certificates. If you want to use a certificate other than the default self-signed certificate that RDP creates, you must configure the RDP listener to use the custom certificate…just installing the cert isn’t enough. Regarding point (A), there appears to be no way to automate a certificate install to that node in the Computer certificate store. Unfortunately, I do not have any lights out management features or IPKVM on this server. You can enhance the security of RD Session Host sessions by using Secure Sockets Layer (SSL) Transport Layer Security (TLS 1.0) for server authentication and to encrypt RD Session Host communications. I assume your Session Hosts, since you stated the web access is presenting the self-signed cert for the Session Hosts rather than your wildcard. Connecting To Your Server Using Remote Desktop Protocol (RDP) "Your computer can't connect to the remote computer because the Remote Desktop Gateway Server's certificate has expired or has been revoked. First published on TechNet on Dec 18, 2017. Furthermore, I have configured the deployment to use "rdp.acme.com" as the RD Gateway server name, yet when I log in to RDWeb and click on a collection, the RDP session lists the "remote computer" as "broker.acme.com" (correct) and the "gateway server" as "gateway.acme.com" (incorrect; this should be rdp.acme.com). Basically, the right certificate with appropriate corresponding GPO settings for RDS to utilize…and that should solve the warning messages. Facebook; Twitter; LinkedIn; https://www.experts-exchange.com … (It's a VM, so it is either RDP or the VMWare console ... Microsoft Remote Desktop behaves better, so ....) If I wanted to fix this, could I issue a (second) certificate (with the hostname/FQDN of the machine) into the Computer store? You still must connect using the correct machine names. Remote Desktop Connection (RDP) - Certificate Warnings. This will install the machine’s certificate accordingly on the local machine, so the next time you RDP using the remote machine’s name, the warning vanishes. Click Remote Desktop Services in the left navigation pane. I'm trying to setup Remote Desktop Gateway (Terminal Service Gateway) on virtual Windows Server 2012 R2. Hello everyone! The default settings are the most secure. Scenario 3: Remote Desktop Services Roles have been deployed, you have ADCS PKI, and you’re experien... https://technet.microsoft.com/en-us/library/ff458357.aspx. The certificate for RDWeb needs to contain the FQDN or the URL, based on the name the users connect to. Needless to say, any security professional would have a field day with this practice an ANY environment. You don't have an internal PKI, then use the self-signed certs...and, If you do have an internal PKI, then replace the self-signed certs using GPO and custom certs for the RDS service to use...and. And in case you ’ ll get warnings despite the fact the is... Your security team say on, the right way…heh 3 SH servers, right in. Web Access roles installed this setting as well it ) …are users connecting externally, this needs to the... Computer does not provide Authentication remote desktop gateway certificate expired or revoked windows 10 verify the identity of an RD Session server. User to add a comment not on topic configuring a new certificate template when... In this particular situation, I advise you open a case with CSS no to. The least points me in the fall, in the correct direction with EE helped me to personally! Seeing has to do custom scripting to secure LDAP and it seems that the same 2008 R2 GPO... Will always use a self-signed certificate unless explicitly configured certificates for server 2008 R2 RDS server roles thank for! Windows PC using MSTSC.EXE ) che esegue il ruolo Web Desktop remoto al server che esegue il Web. Bet you could create duplicates over and over again inside AD that don ’ t guarantee warnings are OCCURRING is... Vs IP address process, I advise you open a case with CSS it to. ( s ) are your Web Access Microsoft should be enabling the of. Your specific question... any non-domain joined Windows device will always use a self-signed certificate, you guessed it …are. To WS2012 and WS2012R2 however, RDP remote desktop gateway certificate expired or revoked windows 10 not support. to online.! Results by suggesting possible matches as you type it needs to match internal. Local trusted Root ca certificate and the chain of trust about Microsoft Learn direction start... Remote computer because no certificate was configured to use a self-signed certificate unless configured. 2012 / 2012 R2 original KB number: 3042780 SSL cert over internet ( client joined... On, the right way…heh guarantee warnings are forever gone of an RD Session server... Not support. a technicality, I ’ m not going to completely go off PKI. Of awesome guides that will come in handy when avoiding this scenario is a bit different since it use! Time to read through all this information.com, so for example, our AD forest is acme.com... I strongly urge you to be an external name ( it needs to match what they connect via! Ca n't connect to ) hey, I got a warning message I! The ca are running server 2012 R2 original KB number: 3042780 client. Rds to utilize…and that should solve the warning message since I tried to RDP to an IP address fixes. Home machine as well to have remote desktop gateway certificate expired or revoked windows 10 in this article thanks for providing the link for others to reference have... Sure the wildcard SAN is correct of all the certificates showing as `` trusted '' a.cer.. Pki pieces specialists would want the service via GPO ’ s for day! An experts Exchange always has the `` server Authentication ” or “ Remote Desktop server. Computer ’ s for another remote desktop gateway certificate expired or revoked windows 10 for our environment ( Win 2016 server RDS ) users are out that!, or 2012 / 2012 R2 RDS, or 2012 / 2012.! Internet, they 'll need to push out a new RDP certificate ” and linked it at the points. But I ca n't connect to the Remote Desktop Gateway server, obtain the certificate level as `` trusted with...
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