SunScreen SKIP supports the following protocol versions:
SKIP, Version 1, for SunScreen SPF-100/100G compatibility.
Any platform that has implemented SKIP as described in the ICG Technical Reports listed in Section 1.1.2, including the SunScreen product line, except SunScreen SPF-100, which only implements SKIP, Version 1 (see above).
Raw mode (also known as ESP/AH, manual keying, or S/WAN) for compliance with RFC 1825: Security Architecture for the Internet Protocol.
SunScreen SKIP, Release 1.1, is the upgrade for SKIP for Solaris, Release 1.0.