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No sound with XDMCP - LinuxQuestions.org
https://www.linuxquestions.org/questions/linux-server-73/no-sound-with-xdmcp-577204/
xdmcp sound redirection - LinuxQuestions.org
https://www.linuxquestions.org/questions/linux-software-2/xdmcp-sound-redirection-756753/
XDMCP Connections to Red Hat Linux 7.0 or Higher
https://support.microfocus.com/kb/doc.php?id=7021775
How to use XDMCP for Remote Desktop Access on Linux
https://linoxide.com/how-to-identify-your-xdmcp-server/
XDMCP (X Display Manager Control Protocol) is a protocol used to provide a mechanism for an autonomous display to request from a remote host. Using this protocol X11 display server (for example X.org) can connect and interact with another computer running X11.
Do I have to open any ports for xdmcp to "listen" on? - …
https://forums.centos.org/viewtopic.php?t=28238
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