Solved by enabling " Enable Forwarding Mode"

Fiz um novo teste com outro cabo e funcionou, problema resolvido.

At first his ISP thought he was going over his rated speed, but we traffic shaped and determined that was not the problem. His ISP now thinks it is the PPPoE Keep Alives not being recieved thus terminating his line. How would he got about mitigating this on the SG-1000?

Here is what the ISP said,
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I'm also wondering about this behavior.

I've three DynDNS host names which are to be updated on WAN IP change and I get two notification mails on every IP change.

Is it possible to prevent the double notification or is there an explanation for that?