On 9/15/21 10:51 AM, nimrod wrote:
Hi,
my devices (pc, laptops, smartphone) all can surf the internet without
problems. So one would say that the router is working properly.
But computer A cannot access computer B via SSH as it's alwais being
doing for years, and viceversa. They cannot even ping each other. No
firewall on them at all.
Computer A can ping computer C instead, and viceversa. No PC can access
the printer website nor print any more. Nor can I scan documents as I
could before, because the scanner is part of the printer.
All the devices are listed in the router's web administrative interface,
but some have a green dot, some other a grey dot, apparently without a
meaning, because some active device has the grey dot and some the green
dot though it's even turned off.
Just one PC is running Windows, all the other three are running Debian.
Another interesting fact is that I can print documents with my
smartphone accessing the printer via DirectWiFi. If I understand it
right, DirectWiFi doesn't make use of the router.
And here is the router info:
Product Vendor: Technicolor
Product Name: AGHP
Serial Number: CP1911TAAWE
Software Version: 19.4
Such devices, usually distributed by TIM in Italy, don't seem the most
performing on the market, but it's still very difficult to use another
one with most italian providers. Otherwise I would change it immediately
with a better and customizable one.
I really cannot figure out what's happening.
Any hint would be very much appreciated.
I'll just ask for a bit of information that might help people on the
list get a better idea of what's going on.
You mentioned computers A, B, and C. Which OS does each computer run,
specifically? And please confirm: A & B cannot see each other, but A & C
can see each other? What about B-to-C connections?
When you try to ping or connect via SSH from A to one of the other
devices which fails to respond, are you using the remote devices' IP
addresses or their names?
Is IPV6 being used on the network, or just IPV4?
Is the router handing out IP addresses via DHCP, or are the addresses
statically set?
If the router really is part of the problem, and if no one can help you
with this router, is it possible / permissible to place a different
router as a client of the current router, and then connect all of your
network devices to that second router? I use this sort of setup so that
the ISP can happily verify that they have provided service to my
location without allowing them to control the router that really matters.
I'm sorry to say I'll be away for a couple of days and unable to
participate, but there are many others here better qualified than I to
help you. If you provide a little more information, that may help them
to help you.
Good luck!
