3 - Uses OpenSSL library for all cryptographic routines
4 - Protection against packet alteration and replay attacks
5 - Tunnels over UDP for high efficiency
6 - Scalable to many sites
7 - Supports bridging multiple ethernet segments
8 - Runs on many UNIX platforms (Linux, Net/Free/OpenBSD, Solaris, MacOS/X) as well as Windows (2000, XP, 7, 8)
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