Well Maybe i am a newbie, thought i knoew what i was doing but now i need some help.

Im scanning my server and i see the following list of open ports and i would like to block them using TCP/IP Filtering but i dont know what they do can anyone help?

port
83
81
82
1080
8080
135 netbios?
445

I also have my SQL HTTP & Remote Admin POrts open but i can deal with those, in this small network the server has two nic's with the one attached to the cable modem set to use internet connection sharing to let the other machines connect to the internet through the serever. would shutting any of these ports off diable my sharinig? Help...................