The Proxy ARP method of routing subnets to solve the docker networking problem

Recently I discovered something called Proxy ARP. I had seen this earlier in sysctl options but never understood it and why would someone need it, until one day I worked in a networking setup which used this to route traffic from the machine to the Internet. It’s an interesting technique and can solve a big problem when you want to use the currently popular tool, docker in your LAN subnet that has DHCP without having to do some other stuff like port forwarding when trying to give access to others.

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