@ncMaothVez Yes, maybe you're right about 554, I'll check with my ISP. but I think it has to do with the extension after the port number = / s0 which causes problems.///Merry Christmas Ted

I have previously had adsl routers of various brands, but when the copper network collapsed, I got a ZTE 4G Router from my supplier instead. I was never really happy with ZTE because it dropped sync...