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https://issues.apache.org/jira/browse/GUACAMOLE-1236?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17259774#comment-17259774
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Nick Couchman commented on GUACAMOLE-1236:
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I'm still not able to reproduce the issue. Here's what I did:
- Created a new Server 2019 VM
- Logged in with Guacamole and launched gpedit.msc
- Went to the configuration item you mentioned (Computer Configuration ->
Administrative Templates -> Windows Components -> Remote Desktop Service ->
Remote Desktop Session Host -> Security -> Require use of specific security
layer for remote (RDP) connections)
- Enabled policy and set to "SSL"
- Rebooted the VM
- Logged in with Guacamole successfully.
It's worth noting that I'm actually using Guacamole 1.3.0, not 1.2.0, but it
works fine.
> Guacamole 1.2.0 can not make RDP connection to Windows 2019 Server
> ------------------------------------------------------------------
>
> Key: GUACAMOLE-1236
> URL: https://issues.apache.org/jira/browse/GUACAMOLE-1236
> Project: Guacamole
> Issue Type: Bug
> Components: RDP
> Affects Versions: 1.2.0
> Environment: Ubuntu 20.04 Server running Guacamole 1.2.0
> Reporter: R Aspinwall
> Priority: Major
>
> Found that old Guacamole 0.9.14 server would not establish an RDP to Windows
> 2019 Server, but was able to connect using Windows RDP client.
> After experimentation on the Windows 2019 Server, I found a Group Policy
> setting which would allow Guacamole 0.9.14 to make an successful RDP
> connection.
> Modify Group Policy (for Guacamole 0.9.14)
> Computer Configuration -> Administrative Templates -> Windows Components ->
> Remote Desktop Service -> Remote Desktop Session Host -> Security -> Require
> use of specific security layer for remote (RDP) connections - Enable (and
> set to policy to negotiate)
>
> Tried with Guacamole 1.2.0 on our new server and to get it to work I had to
> change the Group Policy
> Modify Group Policy (for Guacamole 1.2.0)
> Computer Configuration -> Administrative Templates -> Windows Components ->
> Remote Desktop Service -> Remote Desktop Session Host -> Security -> Require
> use of specific security layer for remote (RDP) connections - Enable (and
> set to policy to RDP)
>
> There is a bug in Guacamole RDP client in 1.2.0 in that it can not negotiate
> RDP or SSL connectivity with Windows 2019 Server. When you configure Windows
> 2019 to use SSL in the Group Policy object above the connection fails, if set
> to negotiate it fails it only works with set to RDP
>
>
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