Virtual vpn in the cloud

 
Advantage: 
Remote access VPN has its advantages of enhancing productivity, providing 
secure communication, reducing costs and increasing flexibility of VPNs [28].
 
Disadvantage: 
One drawback in these VPNs is that all these approaches require VPN client 
software to be installed on each remote client and the target VPN gateway that supports the 
same protocol and extensions for remote access. 
 
 

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Figure 4: Host-to-host VPN architecture 
 
3.3.3
 
Host-to-Host VPNs 
In host-to-host configurations as shown in Figure 4, a VPN tunnel is established 
between two hosts that want to communicate securely without relying on gateways.
 
Advantage:
The main advantage of this approach is that the security is end-to-end.
 
Disadvantage: 
The disadvantage is that these VPNs require VPN software to be installed on 
each host connected to the VPN.

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4
 
M
ETHODOLOGY
 
This chapter describes several aspects related to the cloud-based, VPN test-bed, implemented 
as part of this work: 
Classified into following sub-sections: 
•
Theoretical approach of IPSec VPN mechanism 
•
Architectural Framework 
FIWARE: OpenStack CLIs 
•
Experimental Test-Bed 
StrongSwan 
•
Route-based configurations 
•
Software for performance metrics 
4.1
 
Theoretical approach of IPSec VPN mechanism 
The establishment of a site-to-site IPSec tunnel can be divided into five steps [20]: