After few days of fixing I've the solution. My noob error was to set the "static IP address" while the correct one was "dynamic IP address". It work perfectly.

Ok, got it. I solved by myself. Please don't close this topic, let me see if everything goes ok and I'll post the correct way to use two statics IP.

Region : Italy Model : TL-ER5120 Hardware Version : V2 Firmware Version : ISP : Telecom, Eutelia Hello everyone, aftet a bit of web-searching and forum-searching, I am here to ask you some help....