I have been researching NETBIOS and File, Printer shareing, and have some questions regarding security.

I have two computers in which I wish to enable File and Printer shareing. I have searched google and found much information on this topic includeing how to do it. My concern is the security.

The master computer has a broadband internet conection, and so my wory is an external threat thrying to take advantage of my file shares. I do not have a router, but I do have a software firewall in which I could configure only local access to file/ printer shareing.

Is this enough, to filter all incomeing trafic, or is there a alternative for NETBIOS.

It is my understanding NETBIOS is a protocol, so it would make sence for a third party protocol/service which alows files shareing. Is this avaialable because google does not provide me with any alternatives.

Can someone please lend me some guidence?