My sister's old Belkin router died and she has tried to replace it with both an Asus and a Netgear router and has the same problem with both. We call tech support last night and they could not resolve her problem. She is on Gen4 using a Hughes Jupiter HT1100 which does NOT have builtin wifi, so she connects to an external wifi router for that. Her computer is cabled to the router. Her HP printer connects wirelessly to the router (both tried) and works, and iPhones connect to the router, but do not connect to the internet. The routers show the iPhones as attached devices, but the iPhones say "no internet connection, If this is your Wi-Fi network, try restarting the modem and the router, or contact your ISP." This has happened with an iPhone 9, 12 and 13 with current and most recent prior IOS software. She recalls much difficulty getting the old Belkin to work at first requiring calls to tech support, but she doesn't recall the details, and the Belkin died so we could not see how it was set up. We have searched Apple, Asus and Netgear forums and have not found the exact answer. Some similar problems with cable modems and routers have mentioned "double NAT" as a problem, and to use "bridge mode" but they were not clear answers. Has anyone come across or solved this?
Though the following is concerning the WiFi settings in the HT2000W modem, the settings suggested may help concerning your new router.
Thank you, but that solution, as you say, is for the HT2000W modem which has a builtin wifi router. Her HT1100 is only a satellite modem without wifi which is provided by a separate wifi router. We do suspect some setting, however. Regards - John D for mkclark
Right, but what I mean is that some of the settings suggested, especially the ones concerning the security settings, may help with the iPhone connection issues to the separate router.
She can always try them, and then if they don't make a difference go back to the default settings in the router.