File: //usr/share/webmin/exports/help/auth.html
<header>with or without Authentication</header>
The first column in this field allows you to select the authentication type
for this export. The options are :
<dl>
<dt><b>sys</b>
<dd>Old-style NFS IP or network based security, which is enforced entirely by
the client IP address.<p>
<dt><b>krb5</b>
<dd>Kerberos authentication (requires that the client and server systems have
Kerberos configured).<p>
<dt><b>libkey</b>
<dd>The LIPKEY security mechanism. <p>
<dt><b>spkm-3</b>
<dd>SPKM3 authentication mechanism. <p>
</dl>
<footer>