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Re: [Qemu-devel] Making qemu use 10.0.3.x not 10.0.2.x


From: Gerd Hoffmann
Subject: Re: [Qemu-devel] Making qemu use 10.0.3.x not 10.0.2.x
Date: Wed, 06 Feb 2008 13:39:24 +0100
User-agent: Thunderbird 2.0.0.9 (X11/20071115)

  Hi,

> Using a (once) randomly-chosen default greatly reduces the odds of
> that happening.  Many many people foolishly choose 10.0.{0,1,2,3}.x.
> Many fewer choose (say) 172.30.206.x.  So the fixed qemu default
> should be 172.30.206.x, or some other range also chosen at random.

A few years back I've worked for a web company, wrote the border router
firewall rules, had some rules in there to catch packages with
rfc1918-private addresses in public network.  Watching the statistics
showed that the 172.16/12 range was _much_ less used than 10/8 and
192.168/16.

I think 10/8 to be used by companies alot.  192.168.$smallnumber.0/24
seems to be a quite common default for DSL routers and the like.

Thus picking a random /24 network from 172.16/12 as new default value
has a pretty good chance to vastly reduce the number of clashes with
existing setups.

HTH,
  Gerd

-- 
http://kraxel.fedorapeople.org/xenner/




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