Time at which the USG9000 series shall have the NAT ALG function enabled

When the NAT function and the forwarding of the packets of multi-channel protocols (such as FTP) are enabled on the device, you should enable the corresponding NAT ALG function. As multi-channel protocols negotiate temporary port numbers for transmitting packets during communications, the device adopts the NAT ALG function to automatically detect the port information in the negotiation packet to ensure that the packets of these protocols are correctly translated.

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