Re: Problems setting up DNS, gateway und subnetmask!

On Thu, 29 Dec 2005, in the Usenet newsgroup comp.os.linux.setup, in article
<772213e14d.Alan.Adams@xxxxxxxxxxxxxxxxxxxxxxxxxxx>, Alan Adams wrote:

>On the LAN side of your router, i.e. the wiring between the router and your
>machine, you are using the private network 10.0.0.x. For this to work your
>machine needs to have an address in the 10.0.0.<1-254> range. The router is
>10.0.0.138, so don't use that for your machine.
>
>(For this network, the "official" subnet mask is 255.0.0.0, giving addresses
>from 10.0.0.1 to 10.255.255.254.

Couple of problems. Who is defining the "official" in the sentence above?
Are you assuming that because the address is between 0.0.0.0 and
127.255.255.255, this must use a 255.0.0.0 or /8? If so, have a look at
RFC1517 to RFC1519 from late 1993 - we're not using Class A, B, or C
address names any more. That would also be a 'network' mask, as putting
16,777,215 hosts on a single subnet is like trying to fit everyone in
London into a single airplane. It would be a very tight fit.

>However you need to use the mask that is set on the router, which may be
>different. Addresses below 10.0.0.254 will work with any likely mask,
>provided the mask you set on your machine does match that on the router.)

Yes, the masks have to match, but "any" likely mask? What about the
255.255.255.252 mask mentioned by the O/P?

>I can't help you with the routing commands - I'm new to Linux myself.

The routing commands actually used are detailed on the 'route' man page.

[compton ~]$ whatis route
route (8) - show / manipulate the IP routing table
[compton ~]$

However each distribution has their own cute little tool designed to "help"
with networking setup - only problem is that each tool is very different
from those of other distributions. Also, networking is normally set up at
boot time by scripts and configuration files in /etc/ but as with the tools,
each distribution does it's own thing.

Old guy
.

Relevant Pages

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