I have heard of a program called Net Watcher which is located on the Win 98 CD which can disconnect connections,as for port 1863, this is the port apparently that MSN Messenger uses,for Port 8571 I do not know what services use it,I strongly advise you to get a firewall such as ZoneAlarm and monitor the connections.ZoneAlarm(ZA) has a neat feature on it that let's you stop all internet activity for a certain period of time or for how long you want it to(great if your on Dial-Up,no need to disconnect and redial again).