Dear Florian, > So far, OpenVPN has been working very well for me. Unfortunately, the > iPhone doesn't have (yet?) an OpenVPN client, so I'm forced to work with > what's available. > > The options are: L2TP, PPTP and IPSec. If you were to install a VPN > endpoint on CentOS, which protocol would you prefer? The condition is to > avoid shabby VPN servers that make the system less secure. I've seen > some PPTP servers for Linux in the past but I was not impressed with > their security track record. I'm not necessarily talking about crypto, > I'm talking about the way the application is written. You can set up a Linux box with Poptop (which is definitely the best solution but maybe a choice), racoon (to use with the Cisco ipsec client on the iphone) or openswan in combination with L2TP. Best Regards Marcus