Netscape DIRECTORY SERVER 6.01 Installation Manual page 33

Operating System Requirements
• Enabling Port Filtering—The RPC services are not removed, as it may be
necessary for Microsoft software to make RPC connections on the loopback
interface. However, the RPC ports must not be accessible to other systems.
Open the Network window; select the Protocols tab, then select TCP/IP and
click Properties...; select Advanced and Enable Security. On the TCP/IP
Filtering window, permit only TCP ports 389 and 636 and the administration
port number, permit no UDP ports, and permit only IP protocol 6 (TCP). If you
have multiple interfaces, it may be necessary to repeat this for each interface.
Chapter 2 Computer System Requirements 33