[ML-General] linux networking questions

Tue Oct 6 13:00:16 CDT 2015

Do you at least get a password prompt? If not, what error?
On Oct 6, 2015 12:58 PM, "david" <ainut at knology.net> wrote:

> All my machines are Linux/UNIX/IRIX, except the one (mandatory) Winblows
> box, which is a laptop.
> 3 desktops (one of which apparently won't run Linux more than 48 hours,
> using AMD 83xx or 93xx processor) and 6 SoC's, not including Arduino's or
> tv servers.
>
> Good catch about nmap!  It verified the RPi address.  I still can't ssh
> into it, even though it is not supposed to have any passwords...
>
> Thanks,
> David Merchant
>
>
>
> On 10/06/2015 12:25 PM, Michael Patton wrote:
>
>
> https://www.raspberrypi.org/documentation/troubleshooting/hardware/networking/ip-address.md
>
> do you have another linux device? If so, you can use nmap to discover the
> connections on the network - one of which is hopefully your pi.
>
> I'm not sure what too you could use for windows, but there has to be one:
> arp -a maybe?
>
> I had SEVERE problems with my pi working on a network -- because the cat5
> cable I had was a POS. Once I swapped it out, all of the problems I had
> with the pi disappeared.
>
> don't kick puppies. :)
>
>
> On Tue, Oct 6, 2015 at 11:05 AM, david <ainut at knology.net> wrote:
>
>> I can't get into the RPi 2.  Bah.  Just downloaded a new image to an SD
>> card and I cannot ssh.
>> Can't login direct because I can't find the stupid small HDMI-normal HDMI
>> cable now.  Keyboard and mouse are connected via USB hub but I can't see
>> the output.  Grrrr.
>>
>> I don't know if this new image uses a static IP for itself but I think
>> so.  It *should* be at 192.186.10.1 on wireless but can't find out it's
>> address on wired.
>>
>> Think I'll go out and kick some puppies.
>>
>> David
>>
>>
>>
>>
>>
>> On 10/06/2015 08:28 AM, Michael Patton wrote:
>>
>> I'm late to the game but are you still having problems?
>>
>> I had issues with my rpi last year and dhcp not working blah blah.
>>
>> What does your: sudo cat /etc/network/interfaces say?
>>
>> Have you set up the static IP in there?
>>
>> Sorry if you answered this already and I'm assuming you have --  I need
>> more coffee.
>>
>> On Mon, Oct 5, 2015 at 11:10 PM, david <ainut at knology.net> wrote:
>>
>>> I got the router setup.  It's the PC's (Linux and one Winblows) that I
>>> now need to also configure.
>>> Strange that .7.2 would work already, but not .10.1.
>>>
>>> David
>>>
>>>
>>>
>>>
>>> On 10/05/2015 10:59 PM, James Fluhler wrote:
>>>
>>> I can turn on my rpi in the morning and tell your for certain; and maybe
>>> I completely mis understood your question. I will also be the first to
>>> admit my knowledge of advanced networking is nil. But I always thought that
>>> basically you need everything in IP addresses to be identical minus the
>>> last 3 numbers after the So AAA.BBB.CCC.###
>>>
>>> Now if the issue is that stock the IP address of the beagle bone or rpi
>>> is not taking an address from your router; I think you can use ifconfig to
>>> set the ip and subnet address.
>>>
>>> The only way I could think you could get say your pc at 192.168.1.xxx to
>>> talk to 192.168.2.xxx is to have some device with two network interfaces
>>> connected to both networks that will also share network data between the
>>> net works. Eg you could connect a router to a router thus combining
>>> networks with different IPs and different SSIDs.
>>>
>>> You could probably use your rpi to do this setting up say the wireless
>>> to serve dhcp and act as an access point and the wired connected to your of
>>> network, or even two wireless adapters on the rpi.
>>>
>>> Idk like is said im not an advanced networking person, I have messed a
>>> little with virtual networks and I believe it's possible you could connect
>>> to say 192.168.2.30 from a computer with the address 192.168.1.xxx via a
>>> virtual lan. But I can't say I know exactly how to do this on Linux or PC
>>> well enough to explain in an email. But I use a virtual lan for connecting
>>> to the configuration IP address of a wireless back haul I setup between two
>>> office buildings at work. That said the back haul is connected to the same
>>> network I am on its just its configuration server is on a virtual lan.
>>>
>>> Just a few thoughts maybe someone has better suggestions
>>>
>>> James F.
>>>
>>> On Oct 5, 2015, at 10:37 PM, david <ainut at knology.net> wrote:
>>>
>>> Appreciate the help, Hunter.  Is it not easy to have everything in the
>>> 192.168.x.x address range?  (Mask 255.255.0.0?)  I can't remember any of
>>> this but bits and pieces...
>>>
>>> My router and firewall to the outside world are set not to pass
>>> 192.168.x.x out to the world (as such) but I'm using all bridges internally
>>> (but there may still be one brouter in the mix; not sure.)
>>>
>>> Thanks,
>>> David
>>>
>>>
>>>
>>> On 10/05/2015 10:32 PM, Hunter Fuller wrote:
>>>
>>> The long and the short of it is subnet masking. Basically, in home
>>> networking, your subnet mask is almost always 255.255.255.0 also known as a
>>> /24 (slash 24). What this means is that the first three octets of the IPs
>>> of two devices have to be the same before they can talk.
>>>
>>> Routers are capable of breaking this boundary, but of course your router
>>> can only know about 192.168.1.0/24 so that won't help you.
>>>
>>> If the raspberry pi is handing out addresses in a different range then
>>> you need to put your laptop in that range temporarily, log into the pi, and
>>> reconfigure it to not do that. Unless you intend for it to create its own
>>> separate network that is.
>>> On Oct 5, 2015 10:22 PM, "david" <ainut at knology.net> wrote:
>>>
>>>> Seems like lately I've forgotten everything I've ever known. <sigh>
>>>>
>>>> I need to be able to access subnets at home; everything is behind a
>>>> firewall to the Internet.
>>>>
>>>> My PC's are all dhcp in the 192.168.1.x address space.
>>>>
>>>> I'd like to be able to talk to other addresses from these PC's.
>>>>
>>>> Specifically:
>>>> 192.168.7.2 -- Beaglebone Black default IP Address works just fine.
>>>>
>>>> but
>>>>
>>>> 192.168.10.1 -- particular RPi 2 address from downloaded image does
>>>> not.  Of course, that Pi is a wireless one, while if I turn off the
>>>> wireless and connect a house cable, it gets assigned 192.168.1.56 (for
>>>> example) and that works fine.  BUT, the wifi address is still not
>>>> accessible unless I make the wifi laptop get on the RPi 2 as it's dhcp
>>>> server and then the laptop gets assigned 192.168.10.x. <sigh>  (Same for
>>>> the Android tablet.)  How do I get everything to play nice with each other?
>>>>
>>>> Bought a NAS server and set it's address to 192.168.200.1 -- and
>>>> *nothing* in the house could see it until I changed it's address to a
>>>> 192.168.1.x.
>>>>
>>>> Help, please.
>>>>
>>>> Thanks,
>>>> David Merchant
>>>>
>>>>
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>>
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