IPX Type 0x14 Packets Propagated Even if Disabled

• Microsoft Windows NT Server version 3.51
• Microsoft Windows NT Server version 4.0

SYMPTOMS

IPX Type 0x14 packets are propagated even if you disable forwarding of IPX Type 0x14 packets in the registry by setting the Internet entry to 0.

CAUSE

Browser announcements over an IPX host link are broadcast because the browser requests a 0x14 packet type. Setting Internet under the NWLNKNB registry key to 0 only affects the NetBIOS broadcasts.

RESOLUTION

You cannot prevent this symptom because the software design purposely causes this to happen.

Even if the Internet entry in the registry is set to 0 (use packet type 0x04), Windows NT propagates a few type 0x14 frames.

However, to disable all type 0x14 broadcasts you must disable the binding for IPX/SPX compatible transport under the server service. This will make many Registry modifications, so if this needs to be automated SYSDIFF.EXE will capture all these differences and allow you to apply them on many machines.

MORE INFORMATION

The Internet registry key under the subtree HKEY_LOCAL_MACHINE under the following subkey controls the forwarding of IPX Type 0x04 and 0x14 packets:

   SYSTEM\CurrentControlSet\services\NWLNKNB\parameters

The 0x14 packet type matches Novell WAN broadcast message type.

Type 0x04 specifies forwarding of IPX packets; routers do not forward them. Type 0x14 is a Novell Wan Broadcast Packet; routers do forward them.