Unfortunately, I can't test it directly because my ISP have mac address lock. And it's currently locked on my router and if I connect it directly into my PC I won't connect at all. (The lock is there to secure that no one will use my IP addres. I live in high-rise / prefab house. I don't know how it's called in english. Building with multiple flats).
I believe that it's router's fault because it worked before. I don't have a software, but I have managment via IP address. I can log into my router via LAN address 192.162.0.1 and configure it. But I don't think that there is something helpful for me. Maybe I'm missing something. Did you mean something specific? I can look for it. Or provide a screenshots.