Re: Debian Local Area Network' (Debian-LAN)
In my case is not a matter of randomizing.
We have an internal 10.x.x.x/23 provided by the
national telecom and we are not able to
change the subnet, otherwise we would collide
with other schools.
On Sun, Apr 08, 2012 at 05:15:27PM +0100, Steven Chamberlain wrote:
> Hi,
>
> On 08/04/12 10:13, Giorgio Pioda wrote:
> > 1) Subnet switch to an arbitrary 10.x.x.x/24 or even better 10.x.x.x/23 and
> > also 192.169.x.x networks
>
> I agree, that aspect of Debian Edu's network architecture has always
> bugged me too, but I imagine it's because an address had to be hardcoded
> in some of the configs.
>
>
> Using a randomly-chosen 10.x.x.0/24 subnet means you can link several of
> these subnets together with straightforward routing between gateway
> machines, without resorting to awkward NAT.
>
> It would be easy and very fun to link together neighbouring Debian-LANs
> between homes/offices with wireless meshes and fast wired links.
>
> Randomising as much as you can in network address avoids the chance of a
> collision and having to renumber (and the chance is higher than you
> might think, due to the birthday paradox).
>
> This is similar in principle to RFC4193 unique local IPv6 subnets.
> (Debian-LAN could implement those too!)
>
>
> Or, you can run as many /24's as you need off the same mainserver and it
> can still route traffic between hosts, so I doubt there's a need for a
> /23 subnet or larger. (Unless you really need for a broadcast domain to
> span more than 254 hosts...).
>
> Regards,
> --
> Steven Chamberlain
> steven@pyro.eu.org
>
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