[Mageia-discuss] home network using broadband router

WALKER RICHARD richard.j.walker at ntlworld.com
Fri Mar 9 00:18:12 CET 2012

Right then, I don't think we need to know any more. From here it looks
like your LAN should be fully functioning. Before we try setting up
your NFS shares it might be worthwhile to take a few moments clearing
up a couple of points about networking - things I learned the hard
way, and now so are you :-).

> I do not think I am able to assign fixed IP addresses.

Well, you can. Don't confuse fixed addresses with static addresses you
might get from an ISP. If you had chosen manual setup in MCC when
configuring your ethernet card you could have typed in a fixed address
of your own choosing. Of course you need to know what you are doing so
that you can avoid addresses which your router's DHCP could, in
theory, hand out to some later connected device. Then you would have
two hosts with the same address and all sorts of lost connection

> The computers and router are connected via ethernet cables, within a
> house so I assume that is considered a "same" network.

In fact it is possible to have multiple networks operating on one
common set of installed hardware, but this is seldom considered
necessary in a domestic setting. It is the addresses and network mask
which "define" separate logical networks within a single physical
A quick example; on my 192.168.0.? network I have two PCs and a
firewall. My router, although wired in to the same network, has an
address of That address does not exist in my LAN. If I
want to connect to my router I have to reconfigure a PC to have an
address in my router's network - would do. It is the 1 in
the third octet which makes it a separate network. My LAN mask is 255
for that octet, which says all of the bits in this octet must match
for two addresses to be considered in the same net. (Same goes for the
192 and the 168). Only the fourth octet (mask value 0) can be any 8
bit number.

On 08/03/2012, Florian Hubold <doktor5000 at arcor.de> wrote:
> Am 07.03.2012 14:04, schrieb Cazacu Bogdan:
>> Wont it be simpler to post the output from ifconfig here? And aventually a
>> traceroute output? :)
>> Honestly i've tried to understand what is the problem (i'm [still]
>> guessing it's dhcp related by the looks of the problem and replies) but
>> i'm not sure i got it...
> Yep, that would be rather helpful as a beginning.
> Unrelated: Top-posting is ugly ;)
> Some other notes, from what i read in the thread: most routers
> also allow for what is often referenced as "static DHCP" which means
> statically assigning specific IP adresses via DHCP, always to the
> same machine based on it's MAC adress, which is essentially
> the same as manually-configured static adresses, but
> with a lot less hassle and no manual setup required.
> Also one should not mangle the external IP adress (which is usually
> assigned by the ISP, under which your router is visible to the internet,
> and normally can't be changed manually) with your internal adresses.
> That other part are the IP adresses which you use on your local network,
> which you can setup any way you want, and that has nothing to do with
> your ISP.
> Another thing: When editing /etc/hosts, i wouldn't remove the loopback
> entries, but only add additional entries if you really need to.
> This is also another drawback if you manually assign IP adresses
> and can be easily avoided by properly configuring/using DHCP.
>> -----Original Message-----
>> From: mageia-discuss-bounces at mageia.org
>> [mailto:mageia-discuss-bounces at mageia.org] On Behalf Of Florian Hubold
>> Sent: Wednesday, March 07, 2012 12:54 PM
>> To: mageia-discuss at mageia.org
>> Subject: Re: [Mageia-discuss] home network using broadband router
>> Guys, remotely diagnosing networking problems without having all the
>> relevant information, like the exact IP adresses (if they are from any
>> private range of either class A, B or C networks, they're not even
>> routable over the internet, so don't need to be anonymized) the exact
>> internal routers adress, netmasks and maybe routing tables will just be a
>> wild guessing back and forth.
>> Also firewalls should be switched off at both client computers to rule
>> those out.

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