Well hi there Kiddos!
This evening, I finally had a few minutes to set up my old Raspberry Pi 3B+ to provide a wifi bridge option to my upstairs home server lab. While I could have easily purchased a simple wall plug, ethernet to wifi bridge I decided to go the route of reducing e-waste (already owned) and learning (never done before).
Instructions I used where from Make Tech Easier, and those can be found here:
Overall, this was so, so simple that I would provide this as a NixCraft rating of “Medium Difficulty” and complete in 20 minutes (maximum). Also, rating of fun at: HIGH!
However, there was a snag and I wanted to bring this to the communities attention for helping me learn why this is the case, please.
Within the instructions, the user is requested to make changes to /etc/dnsmasq.conf and to input the parameters:
interface=eth0 listen-address=192.168.220.1 bind-interfaces server=184.108.40.206 domain-needed bogus-priv dhcp-range=192.168.220.50,192.168.220.150,12h
This went fine and dandy all the way to the end when I did my first system test - before a reboot. The server lab picked up the NIC options and started to connect without issue. Then I did the init 6 test. Upon the [ OK ] prompts I noticed at the end that I got a [ FAILED ] related to dnsmasq.service.
Going into the Pi, I did a simple systemctl status dnsmasq.service and found that the service was FAILED as a status. Doing a simple sudo systemctl start dnsmasq.service and later an enable, the system started without issue. But, having a failed at first - I didn’t trust that the service was proper, so I did another init 6 and BOOM - it failed again.
Doing a search on this, I came across another post with a user having similar but with a much more complicated reason. The answer recommendation was to remove/comment out in /etc/dnsmasq.conf - bind-interfaces .
I did so, started to run init 6 & init 0 tests and - 100% fine.
My question to you all is why would the instructions request a bind-interfaces in the conf file? I checked other instructions and they too shared to bind-interfaces. I’m not sure if they are copying each other but I am lead to believe this is NOT the case; that there is a reason but that I just don’t know and understand why.
That’s where you come my detectives If someone has a moment (and has made it this far - YOU GET A COOKIE) can you please help educate me on why this entry was shared and what it could be used for if kept?
Thank you all so much and I hope you are all well, happy, and safe