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Re: Network config




On Thu, Aug 03, 2017 at 08:49:05PM +0200, Pascal Hambourg wrote:
> Le 03/08/2017 à 15:52, Zenaan Harkness a écrit :
> > On Thu, Aug 03, 2017 at 08:53:27AM -0400, Greg Wooledge wrote:
> > > But the problem is, various Unix DHCP client daemons do *too much*.
> > > All I want them to do is set the IP address, netmask, and gateway.
> > > I *don't* want them to change the system hostname, or the system
> > > resolv.conf (in which I have hand-placed *our* DNS search domain and
> > > *our* DNS resolvers).
> > 
> > Well, making /etc/resolv.conf read-only, owned by root.root
> 
> ... is just useless. resolv.conf is already owned by root, DCHP client daemons run as root and on Linux systems root
> (uid 0) ignores read/write permissions.
> 
> > uninstalling resolvconf should also solve your problem.
> 
> No, it solves nothing. Without resolvonf the DHCP client will write directly in resolv.conf.
> 
> > If you in this last (laptop) scenario need specific addition of your
> > static nameserver, on top of the DHCP nameservers (e.g. one
> > nameserver might resolve some internal names, the others might
> > recursively resolve internet names)
> 
> This does not work.
> The resolver stops as soon as it receives a positive (record exists) or negative (record does not exist) answer. If it
> receives a negative answer from the first name server, it won't query the next name server.
> 
> All name servers declared in resolv.conf must be equal and provide the same answers, or unexpected behaviour will
> happen. Multiple name servers is only for redundancy and load balancing, not to provide different answers.

What about putting your script lines (copying files around etc) into
your /etc/network/interfaces file?

Given the uniqueness of how you seem to want to do your networking,
perhaps that's the best option to make it less abnormal - looks like
it to me.

Good luck,