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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One Response to Guacamole 1.4: “Log in failed” for RDP connections

  1. Kevin says:

    Please, don’t do this, except for temporary troubleshooting on a test system. Running the guacd daemon as root is a substantial security risk.

    It may also not resolve the problem, depending on what the root cause is.


    – *temporarily* run guacd as root, as suggested here.
    – If that solves the problem, the problem is a permissions issue on some file, possibly on /data.
    – Fix the permissions issue.
    – Also keep in mind that SELinux or AppArmor can be a problem.
    – Change guacd back to run as user guacd/guacd

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