Can't connect via Fibernet? Can connect from any other.

[Sufili]

Hello,

I am trying to connect from home, via fibernet. But there is an error coming "authentication failed-Aplication will terminate". But i can connect with ADSL VDSL Cable, even with cellphone operator connection. What should i do? I've changed the DNS already but did not fixed. Waiting for some help.
Thanks.

Sufil

[Bozzax]

You on an apple airport extreme?

In that case the subpar NAT/firewall is your problem

[Sufili]

Yes. I use a macbook. Trying it at windows 8.1. So you mean the fibernet + macbook's modem is the problem. So i will try to look tech forums for getting over it. Thanks for the reply.