OpenWRT hate me and I hate it too !
Yes it's a weird intro but it's true. Each time i need to edit any setting on their web interface i start cleaning the flat or find something else to do. I'm used to managing classic Linux systems via SSH but I can't find anything in their system.
Even defining you DNS resolver is hard on their system.
Ma Internet connection is provided thanks to DHCP which means i get the IP settings AND a DNS resolver.
Except, I don't need this service from my ISP as I already have my own resolver. And this funny OpenWRT doesn't try to ease my pain.
So I SSH into the router and try the famous chattr +i /etc/resolv.conf.
chattr: Operation not supported while reading flags on /etc/resolv.conf
O___o Dafuck !
Hoo it's a symbolic link to /tmp/etc/resolv.conf . Well … why not ?
So I try to chattr +i this file.
It fails too with the same error.
GRRRRRRRR I HATE NOT BEING ABLE TO DO WHAT I WANT ON MY DEVICES !
* * * * * printf "#SET VIA CRONTAB\nnameserver 10.2.0.1\nnameserver 10.2.0.2\n" > /etc/resolv.conf
We wait one minute.
If the file is right :
chattr +i /etc/resolv.conf
Here it is !
No more trouble.
As usual I fight against stranges choices from this linux distro but at least it's a Linux so you can fiddle with this !
This technique is « ceinture + bretelles » ( belt + braces ) but now I'm sure not to use my ISP's resolvers.