Open Ports on Webserver - Why

Hi I tested my SUSE 7.2 Webserver with two Portscanners and both gave me the same result: 389 Lightweight Directory Access Protocol 1720 h323hostcall The first, LDAP, I don't know why this is open, it's not installed!?. And the 2nd, the H323-protocol which is used by, for example MS Netmeeting, the same question. I searched with 'netstat -ap' for PIDs of some unknown processes and then I had a look at them with 'ps aux | grep <PID>', but there was nothing unusual. Can that be or is there something wrong with the Portscanner? THX Florian