Translations:IPsec L2TP VPN server/159/en

Also, Mac OS X won't connect if the server certificate contains any "Extended Key Usage" (EKU) fields (except for the deprecated ikeIntermediate one). In particular, when using certificates from the OpenVPN utility, it adds the "TLS WWW Server" or "TLS WWW Client" EKU, so such certificates will not work. However, such certificates can still be used on the Mac OS X client, as it doesn't care what is on the client certificate - only the server.