Log in with your administrator credentials. Default credentials often include: admin or multipro Password: admin , 1234 , or multipro . Step 2: Locating the Firmware Update Section
A: New firmware may have reset your MTU (from 1500 to 1492 for PPPoE) or disabled hardware NAT. Go to Advanced → NAT and re-enable CTF (Cut-Through Forwarding) . zte f670l firmware update upd install