[PLUG] Shifting DNS

Ken Stephens kennethgstephens at gmail.com
Sun May 26 18:53:57 UTC 2019


Rich,

Is this the laptop with a physical network switch?

Ken

On Sun, May 26, 2019 at 11:44 AM Rich Shepard <rshepard at appl-ecosys.com>
wrote:

> This morning the Sony Vaio laptop (model PCG-61A14L) refused to connect to
> the 'Net. This unit is configured to connect to the Belkin WAP; it's not on
> the LAN but connects to the 'Net via the WAP and router.
>
> Checking everything related to "network not reachable" and restarting the
> internet daemon, checking ifconfig, iwconfig, and everything else I
> isolated
> the problem to /etc/resolv.conf (which I thought I had initially fixed).
>
> For some reason overnight /etc/resolv.conf was overwritten by the Belkin
> WAP
> and contained two lines:
> server Belkin WAP
> nameserver 192.168.2.1
>
> Of course, that does nothing as the WAP has a LAN address of 192.168.55.200
> and is connected to the router. So, I modified /etc/resolv.conf.working to
> the most recent nameserver IPs and copied it to /etc/resolv.conf. Then the
> laptop was able to connect externally.
>
> I put the command, cp /etc/resolve.conf.working /etc/resolv.conf, in
> Slackware's /etc/rc.d/rc.local as that's that last file processed when the
> system boots. It took a bit of trial-and-error tweaking the contents of
> rc.local, but that seems to have been the required fix.
>
> My question is what might have changed so the WAP modifies the DNS lookup
> on
> the laptop? The setup has been working for several years without any
> problems so this new issue, while apparently fixed, could do with an
> explanation to avoid future repeats or similar issues.
>
> Carpe holiday,
>
> Rich
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