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

Rules and Keywords
NAT Keywords
Chapter 2 41
You can use the rdr keyword to implement load-balancing systems and
redirect traffic to multiple destination addresses. For example:
rdr lan0 20.20.20.5/32 port 80 -> 192.168.0.5,192.168.0.6 port
8000
map-block: Mapping to a Block of Addresses
IPFilter NAT can map an IP address to a specific block of IP addresses in
two ways.
You can use the map-block keyword to statically map sessions from a
host to a selected block of IP addresses. Configure the following rule:
map-block lan0 192.168.1.0/24 -> 20.20.20.0/24
Any outgoing packet with an IP address beginning with 192.168.1 is
mapped to an IP address beginning with 20.20.20.
Alternately, you can configure IPFilter NAT to translate to a block of IP
addresses using only the map and portmap keywords. Configure the
following rule:
map lan0 192.168.0.0/16 -> 20.20.20.0/24 portmap tcp/udp
20000:60000