HP-UX IPSec version A.02.00 Administrator's Guide

Product Specifications
HP-UX IPSec Transforms
Appendix A
286
ESP-NULL-HMAC-MD5
ESP header and trailer, but nothing is encrypted. An ICV is generated using
HMAC-MD5.
ESP-NULL-HMAC-SHA1
ESP header and trailer, but nothing is encrypted. An ICV is generated using
HMAC-SHA1.
Transform Lifetime Negotiation
The transform lifetimes configured are the preferred lifetimes. The actual lifetimes used
depends on negotiations with the remote system.
If the local system initiates the IPSec negotiations, the ISAKMP daemon will send the
preferred lifetime to the remote system. The remote system may process this value in
any manner according to the IPSec protocol specification.
If the remote system initiates the IPSec negotiations, the ISAKMP daemon will accept
the lifetime sent by the remote system, within the range specified by the IPSec protocol.