I have an idea maybe I could create 2 vlan for the two ip classes and route it to two wan... is it possible?

Thank you Peter, your suggestion sounds good. I'll try this. Wile waiting for a help I tried to contact TPLINK Italy support and they told me that the 5120 has only one LAN interface... So you don't...

Ok, I'll try to be more clear. I need the 5120 to manage two different private ip classes 192.168.1.xxx and 192.168.5.xxx and let the devices connected access internet via the same wan, is it...

Region : Italy Model : TL-ER5120 Hardware Version : V1 Firmware Version : ISP : fastweb Hi guys, I'm new to the forum, just brought for my company a 5120 and need some help for the configuration....