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Whether the USG6000 series supports planning Class A IP addresses for the IPSec VPN intranet

There are no restrictions on private IP addresses.

The connection can be established when at least one end has the fixed IP address and cannot be established when both ends have dynamic IP addresses.

The IPSec VPN tunnel can be established as long as the IP addresses of the two ends are reachable.

Only supports at least one end of the fixed IP connection establishment,do not support both ends are dynamic IP way to establish a connection

No restrictions on private network IP address