From Mac Guides
VPN (Virtual Private Networking) is used to connect to a private network from a remote location, most commonly the office network from home. It require remote users to be authenticated, and secure data with encryption technologies. Secure VPN use cryptographic tunneling protocols to provide confidentiality. Mac OS X has built in support for VPN, which is described as adequate but limited.
Setting up a VPN Connection
- Open Internet Connect
- Select the VPN tab
- Choose Configuration->Edit Configuration to create a new connection
- Fill out the fields
- Click Connect!
At this point, your IP address might change, and entities on the private LAN will become visible to you.
Issues with VPN
It has been reported that Apple's implementation of VPN in Mac OS X makes Google unavailable, and significantly interferes with the load times of websites utilizing Google ads.
To fix this issue, open Internet Connect, choose the Connect > Options... menu item, then uncheck "Send all traffic over VPN connection". This will allow only those connections that require VPN to use VPN, which Google does not.
Alternatives to the built in VPN client