How to provide the NAT Internet access service on the dialer interface when the AR router serves as the PPPoE client to obtain the public network IP address?


You can run the nat outbound acl -number command on the dialer interface to provide the Internet access service in the Easy IP method.

Other related questions:
How is the NAT server configured on the PPPoE dialup interface
On an AR, the NAT server can be configured on the PPPoE dialup interface. 1. Create a dialup interface and configure parameters on the dialup interface. 2. Configure the NAT server on the dialup interface. The internal IP address of the internal server is, the port used for providing services is port 8080, and the external address is [Huawei] interface dialer 1 [Huawei-Dialer1] nat server protocol tcp global www inside 8080 [Huawei-Dialer1] quit

How are NAT services not interrupted when external interfaces on the AR router used as the NAT server dynamically obtain IP addresses
When the AR router functions as the NAT server and the external interface changes continuously, the dialer interface needs to be configured to ensure nonstop NAT services.

When the device functions as a PPPoE client to obtain public IP addresses, how do I configure NAT service on a dialer interface
Run the nat outbound acl-number command on the dialer interface to configure Internet access in Easy IP mode.

When an AR router is used as the PPPoE client, the Internet access rate of the LAN users connected to the device is low
In the dialer interface view, run the tcp adjust -mss value command to set the maximum TCP segment size of the interface. In scenarios of PPPoE application, it is recommended that the value used in the tcp adjust -mss command should be 1200. The maximum transmission unit (MTU) of the PPPoE interface is 1492 bytes. If the packets which are forwarded in Layer 2 and transmitted upward through the interface are larger than the MTU size and cannot be fragmented as configured, the packets cannot be sent, which results in the low Internet access rate of users. In this case, you can run the tcp adjust -mss command in the dialer interface view to modify the maximum segment size (MSS) value determined in the TCP negotiation phase, ensuring that the packet size is smaller than the MTU size of the dialer interface so that the packets can be processed properly and improving the Internet access rate.

If you have more questions, you can seek help from following ways:
To iKnow To Live Chat
Scroll to top