Closing ports (930, 933, 936)

I've just run nmap and it reported that port 936tcp was open. In Yast I've set ssh and ntp to be open on the firewall (SuSEfirewall) nothing else. /etc/services says that 930, 933, 936 are not used. What is using tcp on port 936? Saint reported that 930 and 933 were also open using UDP. What used these ports? How do I close them? -- Collector of vintage computers http://www.ncf.ca/~ba600 Machines to trade http://www.ncf.ca/~ba600/trade.html Open Source Weekend http://www.osw.ca