VPN, Virtual Private Network is a group of computers attached together with the help of a public network, the internet. VPN is used to secure your computer's connection, so that the exchange of data happens safely just between the intended computers.
Depending upon the type of your work, there are different VPNs to suit the requirement. While L2TP, PPTP and IPSec are well-known, there are some differences between them.
Here is How to Identify VPN on Mac OS X:
#1. L2TP (Layer 2 Tunneling Protocol)
It is a simple VPN that does not provide high rate of encryption or confidentiality. When you are trying to set it, you will be asked to set Configuration, Server address, Account name to authenticate settings.
#2. PPTP (Point-to-Point Tunneling Protocol)
PPTP comes with an option of choosing Encryption. If you select it, you need to add your Configuration, Server address, Account name along with encryption. This protocol goes with TCP port 1723 and IP port 47 Generic Routing Encapsulating.
#3. IPSec (Internet Protocol Security)
If configured, IPSec authenticates and encrypts each communication session. It is secure and you can only connect it if you know the password. In Mac, you have to enter server address, account name and password to set it.
Once You Have Identified which Protocol You Have to Install, Here is How to Set up:
Step #1. Click on “Apple” menu and choose “System Preferences.”
Step #2. Click on “Network.”
Step #3. From the bottom of network connection service, press [+].
Step #4. A new interface window will pop up; select “VPN.”
Step #5. In the VPN-type pop up menu, select the kind of VPN connection you want to establish, depending on your network.
Step #6. Give a name to the service in the box next to “VPN Host name.”
Step #7. Now, type the server address, account name and other details for your VPN connection.
Step #8. Press “Authentication settings” and give the authentication information as provided by network administrator.
Step #9. Press “OK” and then hit “Connect.”
You've set up your VPN.