[kwlug-disc] IP addresses and gateways--my google-fu seems to be lacking

Bob Jonkman bjonkman at sobac.com
Thu Jan 16 17:37:44 EST 2014


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Brent wrote:
> It seems like internet traffic is refusing to use the wireless link
> when the wired one is connected, even tho there is no route to the
> internet

There's a BIOS setting on my laptop that automatically disconnects the
WiFi whenever I plug in a LAN cable. As far as Network Manager is
concerned, I no longer have any WiFi radio hardware (or maybe it
thinks I've switched it off with the button above the keyboard, I
don't recall).

I also don't recall what the wording of that setting is, but I can
(and did) disable it. I'm loath to shutdown and poke at my BIOS just
now to refresh my memory. Sorry.

- --Bob.



On 14-01-16 02:05 PM, R. Brent Clements wrote:
> Separate subnets is what I am trying to do,  This device is
> connected to my home router via WiFi on the .1.0 network, and via
> the ethernet port to the bedroom network which is the .10.0
> network.  My Eth-over-power device used to make the connection but
> it died.  I did do this once before, but I can't remember how I did
> it.  Right now I *think* I have iptables configured correctly.  But
> the wireless link that does provide the internet connection when
> the ethernet link is disconnected stops doing so when it is.  I
> think that is the last thing I need to solve.  It seems like
> internet traffic is refusing to use the wireless link when the
> wired one is connected, even tho there is no route to the
> internet.
> 
> Brent
> 
> On Thu, Jan 16, 2014 at 1:54 PM, CrankyOldBugger 
> <crankyoldbugger at gmail.com> wrote:
>> Maybe I missed something, but why are you using 192.168.10.1 with
>> subnet mask 255.255.255.0, when the rest of the network is
>> 192.168.1.0?  That ".10" is throwing you off if you're using a
>> /24 subnet.
>> 
>> Technically speaking, unless you use route tables something on
>> the 192.168.10.0 subnet won't talk to something on the
>> 192.168.1.0 if the subnet mask is 255.255.255.0 (i.e. /24).  You
>> could try changing everything to SM 255.255.0.0 (/16) but that
>> can be risky also.  Much easier if you have all of your devices
>> on the same 192.168.1.0 (or you could even flip everybody over to
>> 172.16.x.x/16, or 10.x.x.x/8)
>> 
>> _Ideally_ the gateway is the address of the router (the "inside"
>> port), usually 192.168.1.1 or .0.1.  Exceptions to this rule come
>> when you're running subnets all over the place, but that's
>> probably more than you need for your installation.
>> 
>> 
>> 
>> On 16 January 2014 13:32, <rbclemen at gmail.com> wrote:
>>> 
>>> So the ip configuration for my lan side interface should be
>>> 192.168.10.1 with subnet mask 255.255.255.0 and gateway
>>> 192.168.1.65? Sent from my BlackBerry device on the Rogers
>>> Wireless Network
>>> 
>>> -----Original Message----- From: Joe Wennechuk
>>> <youcanreachmehere at hotmail.com> Sender: "kwlug-disc"
>>> <kwlug-disc-bounces at kwlug.org> Date: Thu, 16 Jan 2014 13:30:08 
>>> To: kwlug-disc at kwlug.org<kwlug-disc at kwlug.org> Reply-To: KWLUG
>>> discussion <kwlug-disc at kwlug.org> Subject: Re: [kwlug-disc] IP
>>> addresses and gateways--my google-fu seems to be lacking
>>> 
>>> The gateway is the one connected to the internet.
>>> 
>>> ---------------------------------
>>>> Date: Thu, 16 Jan 2014 13:18:13 -0500 From:
>>>> rbclemen at gmail.com To: kwlug-disc at kwlug.org Subject:
>>>> [kwlug-disc] IP addresses and gateways--my google-fu seems
>>>> to be lacking
>>>> 
>>>> I was using an Ethernet-over-power device until a couple days
>>>> ago when one end of it burned out. I am trying to configure
>>>> my old netbook to connect wirelessly to the downstairs router
>>>> (easy) and share the internet connection with the network of
>>>> computers in my bedroom. Whenever I attach the network cable
>>>> to the system I lose the internet. I can ping the ip address
>>>> of both sides of the "router" computer, but nothing beyond
>>>> that. I am using static ip addresses for the inner network in
>>>> the 192.168.10 range, and the wireless address is 
>>>> 192.168.1.65 assigned dynamically from the wireless router
>>>> downstairs.
>>>> 
>>>> I am wondering what gateway address I need to assign to the
>>>> lan-side eth0. I have followed the instructions on several
>>>> sites about configuring iptables. It seems like the netbook
>>>> is losing the internet when I have two interfaces active,
>>>> even tho only one has an internet connection.
>>>> 
>>>> Brent
>>>> 
>>>> 
>>>> _______________________________________________ kwlug-disc
>>>> mailing list kwlug-disc at kwlug.org 
>>>> http://kwlug.org/mailman/listinfo/kwlug-disc_kwlug.org
>>> 
>>> _______________________________________________ kwlug-disc
>>> mailing list kwlug-disc at kwlug.org 
>>> http://kwlug.org/mailman/listinfo/kwlug-disc_kwlug.org 
>>> _______________________________________________ kwlug-disc
>>> mailing list kwlug-disc at kwlug.org 
>>> http://kwlug.org/mailman/listinfo/kwlug-disc_kwlug.org
>> 
>> 
>> 
>> _______________________________________________ kwlug-disc
>> mailing list kwlug-disc at kwlug.org 
>> http://kwlug.org/mailman/listinfo/kwlug-disc_kwlug.org
>> 
> 
> 
> _______________________________________________ kwlug-disc mailing
> list kwlug-disc at kwlug.org 
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> 
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