Unable to user remoteApp via gateway - serveur 2019

Question

Hello everyone,

I'm trying to launch a remote APP via Gateway, but I've this error :

The remote resource can't be reached. Check your connection and try again or ask your network administrator for help.

I've a single server. It has all RDP role ( RDS + License + Gateway + Broker ) and it's not a domain controller.

The Gateway works with a real certificate signed by a global CA, and the port used is 443.

This is strange because :

Local and RDP : OK

Local and RemoteAPP : OK

Gateway and RDP : OK

Gateway and RemoteAPP : ERROR

I've already google this error, and don't found the solution. I already replace DNS by IP in the RDP file. Here is my configuration :

redirectclipboard:i:1
redirectprinters:i:1
redirectcomports:i:0
redirectsmartcards:i:1
devicestoredirect:s:
drivestoredirect:s:*
redirectdrives:i:1
session bpp:i:32
prompt for credentials on client:i:1
span monitors:i:1
use multimon:i:1
remoteapplicationmode:i:1
server port:i:3389
allow font smoothing:i:1
promptcredentialonce:i:1
videoplaybackmode:i:1
audiocapturemode:i:1
gatewayusagemethod:i:2
gatewayprofileusagemethod:i:1
gatewaycredentialssource:i:0
full address:s:172.16.207.101
alternate shell:s:||wpaie
remoteapplicationprogram:s:||wpaie
gatewayhostname:s:MyGatewayWithoutPort
remoteapplicationname:s:wpaie
remoteapplicationcmdline:s:
workspace id:s:172.16.207.101
use redirection server name:i:1
loadbalanceinfo:s:tsv://MS Terminal Services Plugin.1.Pegase
alternate full address:s:AlternateNameOfMyServer
signscope:s:Full Address,Alternate Full Address,Use Redirection Server Name,Server Port,GatewayHostname,GatewayUsageMethod,GatewayProfileUsageMethod,GatewayCredentialsSource,PromptCredentialOnce,Alternate Shell,RemoteApplicationProgram,RemoteApplicationMode,RemoteApplicationName,RemoteApplicationCmdLine,RedirectDrives,RedirectPrinters,RedirectCOMPorts,RedirectSmartCards,RedirectClipboard,DevicesToRedirect,DrivesToRedirect,LoadBalanceInfo
signature:s:SomeSignatures...*

I downloaded this configuration via my gateway server like https://URL/rdweb with the good account.

This account can use the gateway and RD APP. At least, I've this issue with other remoteApp like wordpad, calculator ...

Thank you in advance :).

Answer 1

Hello everyone, my problem is solved.

The problem was I bought a 4096 RSA certificate and I don't know why, but it's not supported with RemoteApp ...
RemoteApp works now with 2048 RSA certificate.

I don't found anything about this on internet...

I hope this topic can help other people :) ...