<samba:parameter name="invalid users" context="S" type="list" xmlns:samba="http://www.samba.org/samba/DTD/samba-doc"> <description> <para>This is a list of users that should not be allowed to login to this service. This is really a <emphasis>paranoid</emphasis> check to absolutely ensure an improper setting does not breach your security.</para> <para>A name starting with a '@' is interpreted as an NIS netgroup first (if your system supports NIS), and then as a UNIX group if the name was not found in the NIS netgroup database.</para> <para>A name starting with '+' is interpreted only by looking in the UNIX group database via the NSS getgrnam() interface. A name starting with '&' is interpreted only by looking in the NIS netgroup database (this requires NIS to be working on your system). The characters '+' and '&' may be used at the start of the name in either order so the value <parameter moreinfo="none">+&group</parameter> means check the UNIX group database, followed by the NIS netgroup database, and the value <parameter moreinfo="none">&+group</parameter> means check the NIS netgroup database, followed by the UNIX group database (the same as the '@' prefix).</para> <para>The current servicename is substituted for <parameter moreinfo="none">%S</parameter>. This is useful in the [homes] section.</para> </description> <related>valid users</related> <value type="default"><comment>no invalid users</comment></value> <value type="example">root fred admin @wheel</value> </samba:parameter>