The application scenarios of tunnel mode generally consist of the following: (1) the remote terminal provides their identities to the firewall; (2) the remote terminal accesses the internal network; and (3) the requested server does not support
IPSec services.
Like
IPSec VPNs, SSL VPN solutions do not meet all of the requirements for mobile and wireless use.
IPsec has two modes of operation which defines the extent of protection offered by
IPsec.
Although it was possible to implement
IPSec with IPv4, it was not part of the specification.
2.5 Benefits of using
IPsec as a defense against Network-based attacks
For example, the system, based on a technology called
IPSec VPN, did not ensure security compliance on the end-user's system.
Simultaneous support for up to 25
IPsec and 10 SSL VPN tunnels enables the ProSafe Dual WAN Gigabit SSL VPN Firewall to serve secure connections for both site-to-site communications and remote or telecommuter access without the need for VPN client software."
The Site2Site remote-access solution combines the secure tunneling capability of an
IPSec VPN with increased security, fine-grain access control and hidden internal networks.