# Fix the MAC address of RoadRunner 

<abstract>
Unfortunately RoadRunner doesn't have a its own unique hardware MAC address on port eth0 so you have to provide
in a software manner. This article explains how to set the MAC address using maccharger utility
</abstract>

[GNU MAC Changer](https://github.com/alobbs/macchanger) is an utility that makes the maniputation of MAC
addresses of network interfaces easier.

Install maccharger o Raspbian distribution:

	sudo apt update
	sudo apt install macchanger

Select __No__ to "Change MAC automatically?" answer during the installation.

Create a systemd file called setmac@eth0.service

	sudo nano /lib/systemd/system/setmac@eth0.service

insert on it this content using the MAC address you need to set on the eth0 interface 
(use <https://miniwebtool.com/mac-address-generator/> to generate a random MAC address):

	[Unit]
	Description=Set the MAC address for %I
	Wants=network.target
	Before=network.target
	BindsTo=sys-subsystem-net-devices-%I.device
	After=sys-subsystem-net-devices-%I.device
	
	[Service]
	Type=oneshot
	ExecStart=/usr/bin/macchanger -m b2:aa:0e:56:ed:f7 %I
	RemainAfterExit=yes

	[Install]
	WantedBy=multi-user.target

Enable the systemd service at startup:

	sudo systemctl daemon-reload
	sudo systemctl enable setmac@eth0.service

then reboot:

	sudo reboot
	
## Links

* [How To Permanently Change The MAC Address On Linux](https://www.linuxuprising.com/2018/05/how-to-permanently-change-mac-address.html)
* [GNU MAC Changer](https://github.com/alobbs/macchanger)

@include='adv_roadrunner'