R3721-F3210-F3171-HP High-End Firewalls Getting Started Guide-6PW101

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VPN application
The F1000-S-EI/F1000-A-EI supports VPN functions, helping branch offices and remote users securely
access the resources in the headquarters and those in their own networks.
Figure 12 Network diagram
F1000-E application
Deployed at the egress of an enterprise network, F1000-E firewalls can protect against external attacks,
ensure security access from the external network to the internal network resources (such as servers in the
DMZ zone) through NAT and VPN functions, and control access to the internal network by using security
zones. You can deploy two firewalls in the network for redundancy backup to avoid a single point failure.