Guacamole 1.4: “Log in failed” for RDP connections

Problem (Guacamole 1.4 while connecting to an RDP server):

Log in failed. Please reconnect and try again

…and in logs:

guacamole guacd[2390]: RDP server closed/refused connection: Security negotiation failed (wrong security type?)

Possible explanation:


nano /etc/systemd/system/guacd.service # replace User=daemon with User=root
systemctl daemon-reload
systemctl restart guacd
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