Various versions of standard PPP are available and in wide use throughout the Internet community. ANU PPP-2.4 is a popular choice for Linux, Tru64 UNIX,and all three major BSD variants:
FreeBSD
OpenBSD
NetBSD
Solaris PPP 4.0 brings the highly configurable features of ANU PPP-2.4 to machines that run the Oracle Solaris operating system. Machines that run Solaris PPP 4.0 can easily set up PPP links to any machine that runs an implementation of standard PPP.
Some non-ANU-based PPP implementations that successfully interoperate with Solaris PPP 4.0 include the following:
Solaris PPP, also known as asppp, available with the Solaris 2.4 through Solaris 8 releases
Solstice PPP 3.0.1
Microsoft Windows 98 DUN
Cisco IOS 12.0 (synchronous)