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1.5.2 MTU
Maximum Transmission Unit (MTU) indicates the maximum size of a packet that can be transmitted by a
network device. In general, you are recommended to keep the MTU as the default value "Auto". But if
you encounter any of the following problems:
Some websites are not accessible or some secure websites cannot be displayed properly (such
as the login pages of online banking websites and Alipay’s website).
Emails cannot be received or servers such as FTP and POP servers are not accessible.
You can try gradually reducing the value (recommended range: 1400 to 1500) to find the suitable value
that does not lead to the problem.
It is the most common value for non-PPPoE connections and non-VPN connections.
It is used for PPPoE connections.
It is the maximum value for the pinging function. (If a greater value is used, packets are fragmented.)
It is used for DHCP, which assigns dynamic IP addresses.
It is used for VPNs or PPTP.
1.5.3 MAC Address
After you complete internet settings, if the Internet Connection Status of the WAN interface on the
Network Setting > Network Setting > Internet Settings page is always displayed "Connecting...", it
may be that your ISP binds your internet account to the MAC address of the computer that is able to
access the internet. If so, only that computer can access the internet using the internet account. The
computer refers to the one used to verify your internet accessibility after your ISP creates the account for
you.
You can try MAC address cloning method 1 or 2 described in the following section to resolve the
problem.
Method 1:
1. Connect the computer with internet accessibility to the AC, log in to the web UI of the AC, and go to
Network Setting > Network Setting > WAN Interface Settings.
2. On the WAN interface to clone the MAC address, find MAC Address, and select "Clone Local MAC".
3. Click Save.