How do I configure NAT ALG

On a Huawei AR router, you can run the nat alg { all | protocol-name } enable command to enable NAT ALG for an application protocol. After NAT ALG for an application protocol is enabled, packets of the application protocol can traverse the NAT device.
Note:
In the command, all indicates that NAT ALG is enabled for DNS, FTP, SIP, PPTP, and RSTP. protocol-name indicates that NAT ALG is enabled for a specified protocol. The value can be dns, ftp, sip, pptp, or rtsp.
The AR510 does not support NAT ALG for SIP.

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