Ehi Jaime, sorry but I need to ask you to speak in English also using Google translate.
I tried to do it for you below:
Hello everyone,
Sorry I do not speak much English, someone I hope I can
help. I installed 6.7 on a server Nethserver my job to provide
Internet service on a LAN, I have set the web proxy with authentication that works very well. Now I’m trying to set the
Multiwan, and added another network interface (red) with the IP, netmask, gateway, dns a different ISP, and want to make it
function as backup, meaning that when a supplier fall, the other continue to give Internet service.
Multi Wan in the menu I created the suppliers c / u in its interface and its respective load, is enabled traffic shaping with bandwidth of 10Mb and 5mb respectively; but it does not work, when I disconnect the No. 1 provider in the control panel changes state from up to down, but you can not browse the vendor No. 2 there is not even ping, no internet does not work in fact checking the log
shorewall one is up and the other Down. If I reconnect the cable internet provider I have denuevo. I reviewed the manual have tried to follow in the footsteps surely have to set something but honestly have not much experience this is new to me,
I hope someone please help me.
Thank you