Respond to ARP requests on behalf of another machine. Useful for keeping a sleeping machine accessible on the network.
📖 Check out the corresponding blog post for a deeper dive into how it works.
Currently only compatible with Linux (tested on Ubuntu 20.04).
Follow these instructions to install ARP Stand-in as a systemd service that runs automatically on boot:
git clone https://github.com/danielpgross/arp_standin
cd arp_standin
bundle exec rake install # You might need to use `sudo` for this
# Create systemd service
sudo cp arp-standin.example.service /etc/systemd/system/arp-standin.service
sudo nano /etc/systemd/system/arp-standin.service
# Be sure to set the three configuration environment variables:
# STANDIN_MAC_ADDR: The MAC address of the machine to answer on behalf of.
# STANDIN_IP_ADDR: The IP address of the machine to answer on behalf of.
# NETWORK_INTERFACE: The network interface to send/receive on.
sudo systemctl daemon-reload
sudo systemctl enable arp-standin.service
sudo systemctl start arp-standin.service
systemctl status arp-standin.serviceAfter cloning the repo, run bin/setup to install dependencies. You can also run bin/console for an interactive prompt that will allow you to experiment.
To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and the created tag, and push the .gem file to rubygems.org.
Bug reports and pull requests are welcome on GitHub at https://github.com/danielpgross/arp_standin.
The gem is available as open source under the terms of the MIT License.