From OpenNMS

(These examples are from configuration files used with OpenNMS version 1.5.9 on Solaris 10 x64)

The following sections must be added to capsd-configuration.xml.

In the protocol-plugin section:

    <protocol-plugin protocol="SMB" class-name="org.opennms.netmgt.capsd.plugins.SmbPlugin" scan="on" user-defined="false" />

At the end of the file, just before the closing tag:

    <smb-config>
        <smb-auth user="username" password="password" type="domain">DOMAIN</smb-auth>
    </smb-config>

The following sections must be added to poller-configuration.xml.

In the services section:

        <service name="SMB" interval="300000" user-defined="false" status="on">
            <parameter key="retry" value="1"/>
            <parameter key="timeout" value="3000"/>
            <parameter key="port" value="445"/>
        </service>

In the monitor service section:

    <monitor service="SMB" class-name="org.opennms.netmgt.poller.monitors.SmbMonitor"/>

Obviously, some variables should be changed to suit your environment.