IPsec specifies ways in which IP hosts can encrypt and authenticate data being sent at the IP network layer. IPsec, also known as Internet Protocol Security, defines the official architecture for securing IP network traffic. SSL VPNs is complete without suggestions for testing VPN products and software. And no comparison of the benefits of IPsec vs. SSL VPNs begins with understanding how IPsec and SSL work to protect remote network connections. Understanding the pros and cons of IPsec vs. It is sometimes used as a sort of ad hoc VPN, such as when remote users log in to their work system to access services and systems within the enterprise network. SSH implements its own encryption and authentication protocols to enable secure circuits between a client and server. No discussion of VPNs would be complete without mentioning SSH, which can be used to enable secure tunnels between clients and servers.
Another important difference is that IPsec does not explicitly specify encryption of connections, while SSL VPNs default to encryption of network traffic.
SSL - or, more likely, the Transport Layer Security ( TLS) protocol, which replaced the now-deprecated SSL protocol - operates at the transport layer and is used to encrypt data sent between any two processes that are identified by port numbers on network-connected hosts. IPsec operates at the network layer and can be used to encrypt data being sent between any systems that can be identified by IP addresses. The major difference between an IPsec VPN and an SSL VPN comes down to the network layers at which encryption and authentication are performed. Enterprises must balance not just the different security risks of each type of network connection encryption, but also weigh the relative advantages relating to network performance, maintenance and configuration when comparing IPsec vs. One of the most important choices when considering a VPN is whether to opt for an SSL VPN or an IPsec VPN.
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