HP-UX IPFilter V17.05 Release Notes for 11i v2

Sends back ICMP error/TCP reset for blocked packets
Keeps packet state information for TCP, UDP, and ICMP
Keeps fragment state information for any IP packet, applying the same rule to all fragments
Drops all fragmented traffic if specified by rule
Redirects packets for forensic analysis if specified by rule
Creates extensive logs when required
Supports IPv6
1.1 Benefits and Features 5