产品规格：
    20 Gbps firewall throughput(App-ID enabled¹)
    10 Gbps threat prevention throughput
    4 Gbps IPSec VPN throughput
    4,000,000 max sessions
    120,000 new sessions per second
    8,000 IPSec VPN tunnels/tunnel interfaces
    20,000 SSL VPN Users
    225 virtual routers
    25/225 virtual systems (base/max²)
    900 security zones
    40,000 max number of policies