A little while ago, I wrote about problems that I was having with my laptop not resolving DNS requests. After I restarted today (because X11 crashed, but that’s a whole other can of worms), it started happening again, even though I had fixed the problem once before. Turns out that the big warning banner at the top of the resolv.conf file was relevant, and that my changes were eventually lost, just not on the first reboot.
So I moved back to my Windows machine for a few minutes to hit up the #debian IRC channel, where I explained my issue and what I had done to solve it last time. Luckily, somebody there presented me with a new solution to the issue that should persist restarts. Instead of making edits directly to resolv.conf, I was instructed to add a prepend line to the /etc/dhcp3/dhclient.conf file:
#add a prepend line to fix DNS issues
prepend domain-name-servers 18.104.22.168;
Where the IP address is the IP of your DNS server (OpenDNS, in my case). After saving the file, I ran
to apply the changes and restart the DNS lookup service thinger. I know that doesn’t sound very technical, but I honestly don’t know anything about the part of the network stack in Debian is responsible for DNS lookups, aside from the fact that it may or may not be called resolvconf, so you’ll have to live with it.
In any case, this seems to have worked quite well, so check into it if you’re having problems resolving DNS addresses on your machine.