I am currently living with my parents and we have just started an Internet contract with a 5G wireless company.
The issue is the MFND settings are behind a password and likely not allowed access by the ISP. Even if they weren’t doing port forwarding on 5G likely isn’t possible because of CGNAT. I think I can use cloudflare tunnels or tailscale to get around this, and not many things need to be directly accessible from the Internet.
The more annoying thing is that setting DHCP reservations likely isn’t possible without getting access to the settings. It’s going to make setting up static IPs difficult too.
Before anyone asks fixed line Internet almost certainly isn’t practical in this area. Getting our own modem while possible is more expensive and potentially difficult, and would mean cancelling the contract.
Is there a reasonable way to work around these issues?
Any help or advice would be appreciated.
You totally misunderstood. I’m recommending that you keep your current modem and plug a new router into it. That will give you the control you are looking for.
A new device won’t run you £300. If you are ok with WiFi 5 you can get one for about £50
Where would I find a device that could run DDWRT or OpenWRT? WiFi 6 is basically a minimum requirement at this point given I already have a WiFi 6 router and WiFi 6 devices. It would be silly downgrading just for the sake of using WRT.
I don’t live in your area so I can’t really say. I personally have a Linksys EA8500 that works pretty well but OpenWRT supports about 2000 devices so chances are you can find something that is supported.
Just make sure to avoid Broadcom
https://openwrt.org/toh/buyerguide
https://openwrt.org/toh/recommended_routers