Yrurtj

I am using EasyTether Pro on Arch Linux. I read the Arch Internet sharing Wiki. It and some other sources gave me some commands to work with:

easytether-usb

dhcpcd tap-easytether

sysctl net.ipv4.ip_forward=1

iptables -t nat -A POSTROUTING -o tap-easytether -j MASQUERADE

iptables -A FORWARD -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT

iptables -A FORWARD -i enp2s0f1 -o tap-easytether -j ACCEPT

iptables -I INPUT -p udp --dport 67 -i enp2s0f1 -j ACCEPT

iptables -t nat -A POSTROUTING -o tap-easytether -s 10.0.0.1/24 -j MASQUERADE

iptables --table nat --append POSTROUTING --out-interface tap-easytether -j MASQUERADE

iptables --append FORWARD --in-interface enp2s0f1 -j ACCEPT

EasyTether works perfectly to get Internet in Arch via connecting my cell phone with USB but I need to also share the easytether USB interface tap-easytether with my existing Ethernet interface. I want to do this so that I can share my EasyTether connection with my house. I want to manually specify ipv4 settings on the devices in my house to use my Arch as the default gateway. The ethernet is connected to my house's router. The router cannot disable DHCP. This should still be no problem as long as I manually specify default gateway in my devices.

Note: The ethernet network and EasyTether network are both using 2 different IP ranges (eth0 is 10.0 and easytether is 192.168).

I think it is possible to share Internet for some interfaces using Network Manager for Cinnamon Desktop does not show the easytether tap Interface, only the Ethernet. Also, I don't even see any Internet connection sharing option in the Network Manager GUI under the ethernet adapter's options (I think Ubuntu has this feature). I think this means I need to do everything from command line.

Another problem is that every time I plug my ethernet in, my easytether Internet stops working because the router on the ethernet network sets the DNS and my system tries to use that for Internet instead of easytether. Internet works again as soon as I unplug the ethernet cable.

So I need to figure out how to act as a gateway on ethernet and forward that through to easytether. I also need to stop my system from trying to use ethernet as the Internet connection. The router in question doesn't let me disable anything. Everything needs to be done in Linux, which I know it must be possible.