IPhone Tethering Not Working After iOS 14 Update

Did Apple change this rule on purpose?

It is not nice at all. There is supposed to be a warning on this issue earlier.

same issue since 14.2 upgrade tethering my CentOS. what a mess

Still not working !

My iPhone will not tether after ios14 update, 14.1 and 14 .2 did not fix. Strange it happened a few days before new phones were announced. Now I get ads for a new phone?

I have updated to iOS 14.2 still no tethering, wifi works fine,

I have updated to iOS 14.2 , no change, tethering still does not work, battery drains fast.

I can confirm this problem, my fritzbox 4040 running with openwrt stop working too. My Manjaro Linux PC cant tether through the iPhone either, but latop with Windows 10 has no problems with tethering.

I can confirm that I can no longer tether via USB to my Synology RT2600ac after iOS 14 update. Also tested on iOS 14.0.1 and it still does not work. It is visible in SRM (Synology Router Manager), and it also appears to give an IP but it won't work. Tried countless configuration options to no avail. This needs to be fixed ASAP.

Synology says they can't do anything on their end. They claim that it is an iOS 14 issue. I guess we have to wait until the next iOS update to see whether this will work again, or not. Surprised that this has not been addressed yet.

Update... on ubuntu detects the ethernet usb adapter, dhcp works but no route to internet, on windows it doesen't detect the ethernet adapter but after installing itunes it appears in device manager. The internet woks on windows with iphone tethering on usb ios 14.1 but there's one catch, if you close itunes the adapter disconnects and dissapears from device manager. Haven't tested on macos an no itunes on ubuntu.

conclusion... still works on usb but with a big but just with itunes

You should check out this about troubleshooting: github libimobiledevice libimobiledevice issues 1038

Packet analysis shows how Win10 systems are sending packet types that were not necessary for IOS 13 USB tethering, and the services that support those are at least in part now obfuscated. The appearance is that the new IOS 14 tethering is engineered to behave in the way we see and to be difficult to establish without a full tethering specification at the packet level from Apple.

Was that information readily available to the devs for various Linux distros and firmware? I don't know the answer, other than that it appears at the moment that just one Linux-based networking device has a patch to allow tethering with an iOS 14 device.

Finding the issue is not difficult. Fixing the issue appears to have a higher degree of difficulty. I've done a small amount of packet inspection myself, and while I got results, I found it neither easy nor fun. If you have skills to lend to the effort in the page the search terms I gave leads to, I am sure they would appreciate the assist. I'd appreciate having a wider range of Linux devices able to use iOS 14 tethering.

Thank you for the feedback...Who was the Linux vendor and where is their patch...I can grab a sample of the exchange to look for the same pattern.

I’ll look at the GitHub article.

Clearly iOS changed their behavior.

I went ahead and ordered a Synology RT2600ac from Amazon Warehouse for $130. I got it up and running and confirmed that tethering works with iOS 13 but not iOS 14. I contacted their support and asked them for the hotpatch, applied it this morning, and now tethering works in iOS 14. My thoughts are if Synology can do that, other vendors, and the wrt community in general, should be able to also.

I think its because iOS. 14.x uses WPA3

I believe Synology is the one who issued a patch for their RT2600ac router. Not sure where their patch is; probably on their support site.