Tunnel mode is the more common IPsec mode that can be used with any IP traffic. If IPsec is required to protect traffic from hosts behind the IPsec peers, tunnel mode must be used.
Oct 02, 2014 · If neither tunnel nor transport is specified, the default (tunnel mode) is assigned. When you define the transform set option you enter crypto transform configuration mode where you can configure mode to tunnel or transport. It will be valid only for the transform set just configured. A VPN Tunnel Guide . VPN Tunnel . A tunnel is a virtual path or route between two end points through the internet. When you’re making a site to site or site to mobile VPN connection, then this is where you are creating a tunnel or a secure tunnel from one gateway to another. It is worth noting that tunnel header preservation seems very similar to IPsec transport mode. However, the underlying IPsec mode of operation with GET VPN is IPsec tunnel mode. Another example of tunnel mode is an IPSec tunnel between a Cisco VPN Client and an IPSec Gateway (e.g ASA5510 or PIX Firewall). The client connects to the IPSec Gateway. Traffic from the client is encrypted, encapsulated inside a new IP packet and sent to the other end. Transport mode is usually with other tunneling protocols (GRE, L2TP) which is used to first encapsulate the IP data packet, then IPsec is used to protect the GRE/L2TP tunnel packets. Tunnel mode is the more common IPsec mode that can be used with any IP traffic. If IPsec is required to protect traffic from hosts behind the IPsec peers, tunnel mode must be used.
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Nov 10, 2011
Layer 2 Tunneling Protocol - Wikipedia
Nov 10, 2011 SSL VPN and IPsec VPN: How they work - Calyptix Nov 02, 2016 When "transport mode" becomes "tunnel mode", free of charge. May 28, 2010