[sf-lug] Connectivity problem
a_kleider at yahoo.com
Fri Jul 13 07:41:27 PDT 2012
Thank you very much for your response.
I followed up on all your suggestions and everything appeared to be as it should be.
Out of desperation I simply "down" and "up"ed the interface:
and after that all worked as it should.
It appears that for reasons I can't fathom, /etc/network/interfaces
isn't properly read during boot time (even though it is read enough such that ifconfig gives results indicating that all is well.) Forcing a re-read by putting
ifdown and ifup in /etc/rc.local makes things work properly.
I've heard people criticizing Debian's ARM packages and this may be an example of what they are talking about. I've also had a problem with automounting of USB connected devices.
a_kleider at yahoo.com
--- On Thu, 7/12/12, Rick Smith <rick at rbsmith.com> wrote:
From: Rick Smith <rick at rbsmith.com>
Subject: Re: [sf-lug] Connectivity problem
To: alex at kleico.net
Cc: "Alex Kleider" <a_kleider at yahoo.com>, sf-lug at linuxmafia.com
Date: Thursday, July 12, 2012, 4:55 PM
In Linksys, you will need to add a static route for
10.0.11.0/24 to 172.24.16.100
In DreamPlug, you will need
to output non-zero, which means traffic can be routed from one network
to another inside the DreamPlug. If it is zero, then:
sudo sh -c "echo 1 > /proc/sys/net/ipv4/ip_forward"
Also check its route table
And see that the default route (0.0.0.0) is to 172.24.16.254
If it is not:
route add default gateway 172.24.16.254
Then from the laptop, ping 10.0.11.1 and 172.24.16.254 and then yahoo.com
Does that get you closer?
On 07/12/2012 08:56 AM, Alex Kleider wrote:
> Here's a configuration problem I don't understand.
> The network is as follows:
> Internet comes in as a fixed IP on the external interface of a Linksys
> WRG54G(v6) router with settings all pretty much at defaults.
> Its internal interface has IP 172.24.16.254 serving a Class C
> 172.24.16.0/24 network.
> On that network is a DreamPlug with ethernet connected
> at fixed IP 172.24.16.100.
> This DreamPlug also has a WiFi interface which serves as a wifi Access Point
> with fixed IP 10.0.11.1 serving another Class C 10.0.11.0/24 network.
> When connected to that access point with my laptop as a client I get
> (by DHCP) IP 10.0.11.100 (as I should.)
> From this laptop I get the correct response to the following commands:
> $ dig @127.0.0.1 linuxmafia.com +short
> $ dig @10.0.11.1 linuxmafia.com +short
> $ dig @172.24.16.254 linuxmafia.com +short
> $ ping yahoo.com
> provides me with yahoo's IP address but the ping does not go through and
> the lap top can not make use of the internet.
> I can't understand how this could be.
> Has anyone any suggestions as to what might be happening or how to trouble
> shoot further?
> (Thanks, by the way, to Rick Moen who taught us/me on this list some years
> ago how to use the dig command.)
> sf-lug mailing list
> sf-lug at linuxmafia.com
> Information about SF-LUG is at http://www.sf-lug.org/
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