HP-UX IPFilter Version A.03.05.14 Administrator's Guide
HP-UX IPFilter and IPSec
IPFilter and IPSec Basics
Chapter 9130
No overlap is in the configurations of IPFilter and IPSec in this network
topology, so there are no conflicts in Scenario One.
CAUTION HP-UX IPSec does not support NAT traversal. If you are using HP-UX
IPFilter with HP-UX IPSec, do not use NAT functionality. However, it is
possible that IPFilter and NAT can be used in network configurations
containing other vendors’ IPSec products that do support NAT traversal.