Hi
Sitting at the console again after a lengthy support session…
May 14 17:40:01 shzg-nethserver systemd: Started Session 6001 of user root.
May 14 17:40:01 shzg-nethserver systemd: Created slice User Slice of apache.
May 14 17:40:01 shzg-nethserver systemd: Started Session 6002 of user apache.
May 14 17:40:19 shzg-nethserver systemd: Removed slice User Slice of apache.
May 14 17:40:20 shzg-nethserver server: 17:40:20.142 [http-bio-8080-exec-35] INFO o.a.g.environment.LocalEnvironment - GUACAMOLE_HOME is “/usr/share/tomcat/.guacamole”.
May 14 17:40:21 shzg-nethserver guacd[24144]: Creating new client for protocol “rdp”
May 14 17:40:21 shzg-nethserver guacd: guacd[24144]: INFO:#011Creating new client for protocol “rdp”
May 14 17:40:21 shzg-nethserver guacd[24144]: Connection ID is “$452123b2-b570-4af0-9038-cf0685fac86a”
May 14 17:40:21 shzg-nethserver guacd: guacd[24144]: INFO:#011Connection ID is “$452123b2-b570-4af0-9038-cf0685fac86a”
May 14 17:40:26 shzg-nethserver guacd[6054]: Support for protocol “rdp” is not installed
May 14 17:40:26 shzg-nethserver guacd: guacd[6054]: WARNING:#011Support for protocol “rdp” is not installed
May 14 17:40:26 shzg-nethserver guacd[24144]: Connection “$452123b2-b570-4af0-9038-cf0685fac86a” removed.
May 14 17:40:26 shzg-nethserver guacd: guacd[24144]: INFO:#011Connection “$452123b2-b570-4af0-9038-cf0685fac86a” removed.
May 14 17:40:35 shzg-nethserver server: 17:40:35.394 [http-bio-8080-exec-19] ERROR o.a.g.w.GuacamoleWebSocketTunnelEndpoint - Creation of WebSocket tunnel to guacd failed: Connection to guacd timed out.
It seems that RDP isn’t installed?
Support for protocol “rdp” is not installed
Note, the above log messages are not from my home server (updated to 7.8 this morning), this server is still on 7.7.1908.
RDP directly to the PC/Server in question all work as expected. Just Guacamole has issues.
My Windows at home wanted an update first… 
→ When you need it, it wants to update.
After Windows updating and reboot, Guacamole at home works…
Any ideas?
Andy