The Host IPS client firewall filter driver detects TCP/IP and UDP protocols only. The filter might not recognize some types of non-IP traffic such as Novell IPX/SPX, and it might drop the packets. Also, the Adaptive and Learn modes do not dynamically detect and create firewall rules for non-IP protocols. 

 

In mixed protocol traffic environments, some applications might rely on non-IP or certain application layer protocols to establish communications. In such cases, the firewall administrator must manually create appropriate firewall rules.
 
The best practice is to manually configure non-IP protocol rules, if Adaptive or Learn Mode fails to automatically create a firewall rule.