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Edit File: libvirt.xml
<?xml version="1.0" encoding="utf-8"?> <service> <short>Virtual Machine Management</short> <description>Enable this option if you want to allow remote virtual machine management with SASL authentication and encryption (digest-md5 passwords or GSSAPI/Kerberos). The libvirtd service is needed for this option to be useful.</description> <port protocol="tcp" port="16509"/> </service>