5 out of 5.0, Reviewed Aug 24, 2016
The only firewall NEVER compromised in use. The highest level of functionality available in this type of device including flawless failover. Timely software updates that don't fail or break things. The BEST tech support EVER, better even than Cisco TAC. Performance levels meant the firewall was literally invisible to users. The only product I ever used that did EVERYTHING it was sold to do, and did it well.
Plan your rules carefully. Get this tied into a SIEM. The darn thing works so well, if you don't watch it carefully, you will stand off APTs without knowing they were there. I can't count the yawns I had while reading hysterical accounts of day zero disasters... elsewhere.
Never been hacked. Anywhere. Including Defcon. Who else can make that claim in your Magic Quadrant? That would be, um, nobody. Failover leaves even telnet sessions intact, video streaming doesn't even hicccup. Troubleshooting capabilities for connectivity issues are pretty good, and almost always highlight the culprit, which is generally not the firewall.
It is so standards based and rigorous that crap software breaks for good reasons. Stuff like 4000 byte POST transactions with unicode embedded trying to tunnel through as http traffic tends to upset your Sidewinder. The GUI is slow. Command lines tend to be on the cryptic side. Like you yearn for user friendly Open BSD.
Marketed it better so more people used it and the customer base was big enough to sustain a big user base. Communicate that they had a device that bypassed security theater for genuine functionality. Needs a flashy GUI dashboard for the C levels.
Impose better operational change control and document rule set better. This would have allowed us to remove old, unnecessary rules better.
You need a six here, too.
New Owners, can't tell.