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openvpn --verb 9 --dev tun0 --config /etc/openvpn/client.conf
OpenSwan and Mac and
http://www.jacco2.dds.nl/networking/freeswan-l2tp.html
Microsoft provides Mac users with a free Remote Desktop Connection Client For Mac application
[Openswan Users] Mac OS X can't connect to Openswan server (Linux Kernel 2.6)
http://people.mandriva.com/ybourhis/openvpn/index.html
The following ciphers and cipher modes are available for use with OpenVPN. Each cipher shown below may be used as a parameter to the --cipher option. The default key size is shown as well as whether or not it can be changed with the --keysize directive. Using a CBC mode is recommended. DES-CBC 64 bit default key (fixed) IDEA-CBC 128 bit default key (fixed) RC2-CBC 128 bit default key (variable) DES-EDE-CBC 128 bit default key (fixed) DES-EDE3-CBC 192 bit default key (fixed) DESX-CBC 192 bit default key (fixed) BF-CBC 128 bit default key (variable) RC2-40-CBC 40 bit default key (variable) CAST5-CBC 128 bit default key (variable) RC5-CBC 128 bit default key (variable) RC2-64-CBC 64 bit default key (variable) AES-128-CBC 128 bit default key (fixed) AES-192-CBC 192 bit default key (fixed) AES-256-CBC 256 bit default key (fixed)