On Sun, 21 Jan 2018 11:11:01 +0000, The Natural Philosopher wrote:

> On 20/01/18 20:42, Jack Fearnley wrote:
>> Now that I have my two RPi's up and running and accessible I have come
>> up with a communication problem.
>>
>> I will use ssh in the following explanation but rlogin and telnet have
>> similar problems.
>>
>> The wired and wireless parts of my network don't want to communicate
>> with each other.
>>
>> The raspberries can ssh each other over the wifi part of the network
>> and my two Ubuntu machines can also ssh each other over the wired
>> network.
>>
>> However, I cannot ssh from Ubuntu to RPi3 when RPi3 is on wifi.
>>
>> If I wire the RPi3 it can ssh to and from Ubuntu.
>>
>> All the units can ping each other so some communication is happening.
>>
>> Also, when Ubuntu (wired) tries to ssh the RPi (wifi) it gets as far as
>> requesting a password. the password is entered and then it hangs.
>> Control c does not escape the condition. I have to kill the terminal
>> session.
>>
>> I realise that this might not actually be a RPi problem but a more
>> general routing problem.
>>
>> Maybe there is some obscure setting in /etc/ssh or somewhere which may
>> be causing this but I have no idea where to start looking.
>>
>> Best Regards,
>>               Jack Fearnley
>>
>>
>>
> Most likely your router is set up to separate wired from wifi
> connections.
>
> Possibly has a 'guest' network on wifi that only allows internet access,
> not access to the wired LAN

So, the guest network hypothesis seems to be the favorite right now.  I
shall study my router. It is a D-Link WBR-1310 if any of you are familiar
with it.

Some additional factoids:

If I ssh to the RPi3 and give a false password it says 'permisson denied.
Try again'

My main computer (Ubuntu) has wired ip address 192.168.0.101 and wifi
address 192.168.0.104. I CANNOT ssh from my RPi's to 192.168.0.104 even
though they are all on the wifi network at that point!

Jack

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