Re: Getting along without a keyboard

Chris Green <cl@isbd.net> wrote:

 

Three possible things to check:-
 
1 - Are the two Pis on the same subnet?  I.e. while you have told us
the whole address for the Pi2 (192.168.1.10) you have only given the
last digit for the Pi5 and the router.  What are the full IPV4
addreses for the Pi5 and the router.  Certainly some widely used
routers default to 192.168.0.254 and I'm wondering if that is your
problem.  Maybe you even have *two* subnets on the router.

The router (A DI-524) has only one subnet (192.168.1.nnn) for which it
is the DHCP server. Both Pi5 and Pi4 use DHCP, with the DHCP range
from 192.168.1.10 to 192.168.1.20 .

 
2 - Are you using the 'guest' WiFi of the router, this may prevent
connecting between different systems using the WiFi.  This may even be
possible to configure with non-guest networks.  You'll have to look
into the router configuration to check.
>

There's nothing called guest mode in the config pages, but there are
"filters", described as "allow or deny LAN users from accessing the
Internet". Nothing is listed as enabled, so I don't think that's the
problem.

There are three firewall rules active, allow ping to WAN port, allow
LAN to LAN for all protocols and deny WAN to LAN for all protocols.

3 - Is the Pi2 connected to the same network/router as the Pi5? Are
you sure it's using DHCP to get its address?  If so then you should be
able to check on the router that it's connected to as it is the router
that is handing out IP addresses (usually).
 
 

Yes, there is only one router/AP.

The first thing I would be doing is to look at the routers's Web GUI
to check what it thinks is going on and what is connected to where.
 
 

The DHCP range is limited to 192.168.1.nnn, with no distinction between
wired and wireless connections. There's clearly bridging from wirless to
wired devices such as the printer, which works and can be pinged.

Maybe there's a firewall between wireless clients. I've certainly not needed
such connections much. I'll poke around on the Web to see if there are any
references to Guest Mode online. The internal help pages are close to useless,
and the configuration menus are worse.

Thanks for writing, and your patient good counsel!

bob prohaska