[Discuss] connection issue

[John Hall]

agree with this idea of adding a network device but first lets get more
details that  is just going to make things complicated.  I'd go for a
simple switch if you add anything.
Most access points have a place to set up static DHCP addresses in Advanced
and most just let you choose the device that's connected and set that
device's address. I usually change the range for the DHCP automatic
assignments to start at like 100, then set the static addresses in the
lower end of the range.
Another complication can be if you have a network with both wired and
wireless systems.
The router must be set to bridge the wifi and the ethernet.

Are any systems set to be in a DMZ at the access point?

It could be a problem with routing tables not being propagated, or the net
mask being misconfigured also usually set by dhcp.
If you can nail down the IP addresses then you can set routes and hostnames
manually but what it should do is get DNS from the Lan access point and
this should contain them all. If you have /etc/resolv.conf and /etc/hosts
configured in a certain way, this might be confusing the routing.

Have you rebooted everything? (I  would presume yes but it could be
inconvenient.)
If it is a system configuration issue on your linux boxes is there a way a
change in one system would be migrated to the others ?

We would benefit from some tabular data rather than a dozen separate
questions:

net1, Network device1 manufacturer and model#, wifi or ethernet (if both
list twice), number of ports or list of frequencies
net2, Network device 2 manufacturer and model#, wifi or ethernet (if both
list twice),number of ports or list of frequencies
sys1, name, MAC1, IP, netmask,wifi or ethernet,  net device, port or band(s)
If a system is connected to both ethernet and wifi list it twice
sys2, name, MAC1, IP, netmask,wifi or ethernet,  net device, port or band(s)

It's very simple but that means it would be easy to make the table and we
don't really need macs on a first pass, or maybe just answer some of the
questions it implies.

Some commands and files to look at that might help:
ip addr
ping -b 192.168.0.255  # Ususully the broadcast address. #I think that is
the right option
or
nmap -sP 192.168.0.1-254
systemctl status sshd
/etc/resolv.conf
/etc/hosts
firewall-command --permanent --list-all-zones
firewall-command --list-all-zones


On Sun, Nov 20, 2022 at 5:17 PM dan moylan <jdm at moylan.us> wrote:

>
> shankar viswanathan writes:
> > I am not familiar with the Wifi access point that the
> > T-Mobile service provides, but I'm taking a guess here. Did
> > you set up these machines on a "guest" SSID network or some
> > such setting on the AP? I have found that the default
> > configuration in typical home routers for guest networks is
> > to isolate clients from each other and only allow access to
> > the WAN.  This would explain the behavior you are seeing.
>
> it is indeed a wireless access point connecting to their
> cell towers.  don't really remember, but signing in as guest
> is  not something i would have done on purpose.  the phone
> app shows all the connections, and nowhere do i see "guest".
>
> btw, when i ping i see "destinantion host unreachable"
>
> ole dan
>
> j. daniel moylan
> 84 harvard ave
> brookline, ma 02446-6202
> 617-777-0207 (cel old ng)
> 857-396-9950 (cel new)
> jdm at moylan.us
> www.moylan.us
> [BLM]
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