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I have followed the instructions on the iPhone tethering page on the wiki and my phone shows in the list of network devices when running 'networkctl list'.
The phone shows that the computer is connected to the hotspot with a blue indicator in the top left corner of the screen and I can get a response when pinging the phones public IP address from the command line.
Any other ping request times out and i have tried pinging both web addresses and IP's such as 8.8.8.8.
Internet works fine on the phone and the computer is fully able to connect to the internet when using a wired ethernet connection.
I have tried rebooting both the phone and the computer and can successfully mount the phone to view files using ifuse.
Output of 'ip addr':
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: enp0s31f6: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel state DOWN group default qlen 1000
link/ether 18:31:bf:4c:09:d7 brd ff:ff:ff:ff:ff:ff
9: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
link/ether 42:98:ad:98:42:2a brd ff:ff:ff:ff:ff:ff
inet 172.20.10.3/28 brd 172.20.10.15 scope global dynamic noprefixroute eth0
valid_lft 85252sec preferred_lft 85252sec
inet6 fe80::c33e:ddf:a8ea:673a/64 scope link noprefixroute
valid_lft forever preferred_lft foreverOutput of 'ip route'
default via 172.20.10.1 dev eth0 proto dhcp metric 20100
172.20.10.0/28 dev eth0 proto kernel scope link src 172.20.10.3 metric 100Offline