[ML-General] linux networking questions
david
ainut at knology.net
Tue Oct 6 12:57:43 CDT 2015
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
> <mailto: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
>> <mailto: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
>>> <mailto: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
>>>>> <http://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
>>>>> <mailto: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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