Tunnel versus Transport Modes ?
The differences between Transport mode and Tunnel mode can be defined (www.ietf.org RFC-2401) thought the following network configurations: • Tunnel Mode is most commonly used whenever either end of a security association is a security gateway or both ends of a security association are security gateways, the security gateway acting as a proxy for the hosts behind it. Tunnel mode encrypts both payload and the whole header (UDP/TCP and IP). Tunnel mode Zoom • Transport Mode is used where traffic is destined for a security gateway and the security gateway is acting as a host e.g. SNMP commands. Transport Mode encrypts only the data portion and leaves the IP header untouched. Transport mode Zoom TheGreenBow IPSec VPN Client supports both modes.
The differences between Transport mode and Tunnel mode can be defined (www.ietf.org RFC-2401) thought the following network configurations: • Tunnel Mode is most commonly used whenever either end of a security association is a security gateway or both ends of a security association are security gateways, the security gateway acting as a proxy for the hosts behind it. Tunnel mode encrypts both payload and the whole header (UDP/TCP and IP). Zoom Tunnel Mode • Transport Mode is used where traffic is destined for a security gateway and the security gateway is acting as a host e.g. SNMP commands. Transport Mode encrypts only the data portion and leaves the IP header untouched. Zoom Transport Mode TheGreenBow IPSec VPN Client supports both modes.
