Valuable features for us include:
- Routing: When firewalls can also perform full routing functionality, it helps to save cost on dedicated routing hardware.
- High Availability (clustering): This is important to ensure service availability in the event of a node failure. These firewalls in HA mode consist of a primary and backup node, and provide redundancy such that if one of the nodes fails, the other node will take over.
- Deep packet inspection (DPI) capabilities: Juniper SRX firewalls inspect packets as they traverse the firewalls and it goes beyond the traditional five tuples (source IP, destination IP, protocol, source port, and destination port) packet inspection by using the App-ID engine to inspect the protocol to correctly identify applications. It further rate-limits traffic, using the AppQoS features, based on specific types of applications.
- IPSec VPN: This is crucial because it provides secure site to site connectivity between the DC and remote locations. Traffic traversing the secure link is protected from the prying eyes of unauthorized intruders or the man-in-the-middle.
These features are valuable because they allow smooth operation of the business from a technology standpoint. Again, this is relative.