OpenConnect is known to work, with both IPv6 and Legacy IP, on Linux(includingAndroid), OpenBSD, FreeBSD (including Debian GNU/kFreeBSD), NetBSD,DragonFly BSD, OpenIndiana/OpenSolaris, Solaris 10/11, Windows and Mac OS X platforms, and should be trivially portable to any other platformsupporting TUN/TAP devicesand on which GnuTLS orOpenSSL runs.

Download OpenVPN, a cost-effective, lightweight VPN that's the best solution for small to medium enterprises. I f you really need to use a n unsupported OpenVPN 2.3 (or even older) release and need to stay on BF-CBC (not recommended), the OpenVPN 2.5 based client will need a config file change to re-enable BF-CBC. But be warned that BF-CBC and other related weak ciphers will be removed in coming OpenVPN.

For Solaris support, and for IPv6 on any platform, thevpnc-script shipped with vpnc itself (as of v0.5.3)is not sufficient. It is necessary to use the script from the vpnc-scriptsrepository instead. That repository also contains an updated version ofvpnc-script-win.js which is required for correct IPv6 configurationunder Windows.

OpenConnect is known to work on at least i386, x86_64, PowerPC and MIPSprocessors, and should not have issues with portability to other CPUs.

Note that 'Cisco Secure Desktop' support may require the ability to run Linux/i386 binaries; see the CSD page. CSD is not yetsupported under Windows.

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New Ports

Platform support for new UNIX systems is relatively simple to add— most of the difference is in the TUN/TAP device handling, andthe major variants of that are already supported.

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OpenConnect builds for Windows using MinGW in 32-bit and 64-bit mode, andworks with the TAP-Windows driver shipped with OpenVPN (driver version9.9 or later).