SuSEfirewall2: Why is 137 open and Port 113 not shielded?

Hello! I am running SuSE 8.0 on my notebook and use VMware together with a Samba-Server in order to store my data in Linux and to be able to use different Virtual M$-machines. I started a Nessus in the VMWare on Linux base and scanned my system in order to ensure the correctness of the configuration. Sadly nessus tells me that from the outside Port 137 is open and netbios-names can be read. How can I ensure to fix this hole? How can I close the Port IDENT -113 with SuSEfirewall2? Thank you for any advice! -- Freundliche Grüße kind regards Ingo