IPSec can be configured in tunnel mode or transport mode. IPSec tunnel mode can be used as an alternative to a GRE tunnel, or in conjunction with a GRE tunnel. In IPSec tunnel mode, the entire original IP datagram is encrypted, and it becomes the payload in a new IP packet.
Dec 27, 2018 4.3.3.3 Packet Tracer - Configuring VPN Transport Mode.pdf Page 1 of 3 Packet Tracer – Configuring VPN Transport Mode Addressing Table Device Private IP Address Public IP Address Subnet Mask Site Private_FTP server 10.44.2.254 N/A 255.255.255.0 Gotham Healthcare Branch Public_FTP server 10.44.2.253 209.165.201.20 255.255.255.0 Gotham Healthcare Branch Branch_Router N/A 209.165.201.19 255.255.255.248 IPsec Security Associations Overview - TechLibrary
IPsec transport mode: How it works
Client-side VPNs (AnyConnect, RDP) use transport mode because they set up end-to-end or end-to-site encryption. They do not rely on any other security infrastructure to create and maintain the tunnel. Tunnel mode is most often done between VPN gateways (routers) that maintain the tunnel without needing to install or configure the clients. Transport mode is implemented for client-to-site VPN scenarios. NAT traversal IS NOT supported with the transport mode. MSS is higher; 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. EDITED:
IPSec can be configured in tunnel mode or transport mode. IPSec tunnel mode can be used as an alternative to a GRE tunnel, or in conjunction with a GRE tunnel. In IPSec tunnel mode, the entire original IP datagram is encrypted, and it becomes the payload in a new IP packet.
Generic VPN Configuration in SonicOS Enhanced Enable Transport Mode - Forces the IPsec negotiation to use Transport mode instead of Tunnel Mode. This has been introduced for compatibility with Nortel. When this option is enabled on the local firewall, it MUST be enabled on the remote firewall as well for the negotiation to succeed. If the trigger level is reached, the VPN connection is Solved: JunosPulse : SSL or ESP transport - Pulse Secure ESP vs SSL mode is the transport mechanism between the client and the SA. Between the SA and the backend will the protocol the client would normally use if they were on … IPSec Modes - YouTube Jun 06, 2016 VPN Basics: Internet Protocol Security (IPSec)