HP-UX IPFilter Version A.03.05.14 Administrator's Guide

Firewall Building Concepts
Chapter 464
It contains the following sections:
• Blocking Services by Port Number
•Using Keep State
• Using Keep State with UDP
• Using Keep State with ICMP
• Logging Techniques
• Improving Performance with Rule Groups
• Localhost Filtering
• Using the to Keyword to Capture Blocked Packets
• Creating a Complete Filter by Interface
• Combining IP Address and Network Interface Filtering
• Using Bidirectional Filtering Capabilities
• Using port and proto to Create a Secure Filter
NOTE Most of the information in this chapter has been derived from the IP
Filter-based Firewalls HOWTO document written by Brendan Conoby
and Erik Fichtner. You can find this document at
http://www.obfuscation.org/ipf/.