WAN using IP VPN over Internet vs MPLS - Pros and Cons

There are two major types of Internet-based VPNs: IPSec VPNs and SSL VPNs. Each has significant advantages - and disadvantages - in the corporate networking environment. Recognized as the most secure method for communicating to remote private networks over the Internet, the IPSec standard provides robust authentication and encryption of IP packets at the network layer of the OSI model. In site-to-site communication, IPsec is implemented in the firewall or router connecting each site to the Internet. When an end node initiates communication with a node at a distant site, the IPsec implementation on the initiating site's firewall uses IKE to create security associations with IPsec on the remote firewall. Site-to-Site IPSec VPN Tunnels are used to allow the secure transmission of data, voice and video between two sites (e.g offices or branches). The VPN tunnel is created over the Internet public network and encrypted using a number of advanced encryption algorithms to provide confidentiality of the data transmitted between the two sites. It is meant for communication with VNET resources only.
Using this method, the traffic for PaaS services from on-premises will not be encrypted but it will traverse as normal traffic over MS peering.

If you use IPSec over Private peering for Virtual WAN, it provides encrypted transit between the on-premises networks and Azure IPSec’s operation is called end-to-end mode (also known as transport mode.) This is because data is protected before it leaves the originating machine and it remains secured until it reaches its destination. IPSec can also be used to secure traffic passing through other networks (e.g. The Internet). This is known as tunnelling mode. In the Description field, type NAT for IPsec tunnel Site A. Click Save and on the next page, click Apply changes. The new entry should now be shown in the outbound NAT overview. At this point Site B will have a working Internet connection through the IPsec tunnel out Site B’s Internet provider.

IPsec VPNs typically work best with these applications, as users access them via internal networks instead of over the public Internet, and IPsec functions at the network layer. Cloud-based applications, also called SaaS (Software-as-a-Service) applications, are accessed over the public Internet and hosted remotely in the cloud. SSL VPNs

IPSec VPN Gateway | Serial to Ethernet | Perle

Internet Protocol Security (IPsec) is a set of protocols which sit on top of the Internet Protocol (IP) layer.It allows two or more hosts to communicate in a secure manner by authenticating and encrypting each IP packet of a communication session.

May 01, 2015 Technical Note: Building a Layer-2 VPN with VxLAN over IPsec Layer-2 VPN (aka Ethernet-VPN, EVPN): subnet spans over two sites which are connected via a VxLAN-IPsec tunnel A software switch is configured to bridge Ethernet frames between the local LAN and the VxLAN-IPsec tunnel; Ethernet frames forwarded to the remote site are encapsulated in UDP (VxLAN) then protected with IPsec (VxLAN over IPsec) Cisco CCNA – IPSec VPN vs SSL VPN – CertificationKits.com