[Tuxaloosa] Network Troubleshooting and Ethernet

[Edward Terry]

I don't have a network diagram, unfortunately.  My technical knowledge 
is pretty limited.  The modem (which as I understand it is a combination 
cable modem and router) is an Arris TG1682G and is rented from Comcast. 
The primary computer is running Linux Mint 17.2 (Rafaela) and is 
connected directly to the modem via Ethernet cable.  The secondary 
computer is in an adjacent room and is running Linux Mint 18 (Sarah); it 
is plugged into an Ethernet jack.  A cable in the main room is plugged 
into an Ethernet jack and then into the modem.  The two computers are 
probably twenty feet apart, so not a great distance.  I tried replacing 
all the Ethernet cables (though not the cable between the two jacks, 
which is probably only about a foot long), but it made no difference.

The secondary computer only needs Internet access; the two computers 
don't need access to each other.  Internet is working fine on the 
primary computer.  The Internet connection on both computers was 
originally set up automatically by Linux Mint.  The trouble started when 
Comcast required us to replace the previous modem (which I will admit 
was pretty old, but worked fine), so I suspect the new modem may be the 
cause of the problem, though of course the timing could be a 
coincidence.  Numerous calls to Comcast have not been productive; some 
of the reps tried to be helpful, but they seem to have even less 
technical knowledge than I do.  I've also Googled extensively but have 
not been able to solve the problem.  I appreciate any suggestions.

The two computers are at my parents' house, so I don't have as much 
access to them as I would if they were at my house, though I'm generally 
at their house at least twice a day.

In addition, if anyone knows someone who would be interested in running 
Ethernet cable at three houses, I would appreciate any referrals, 
especially if the person involved can also troubleshoot Linux networks.

Edward


On 5/1/19 12:50 PM, Shane Sanders wrote:
> Hi Edward,
> Do you have a network diagram showing how you have your devices cabled?  
> I would be happy to help you troubleshoot but I have no interest in 
> pulling cables.
> 
> Thanks
> 
> On Wed, May 1, 2019 at 12:33 PM Edward Terry <eterry at highacres.net 
> <mailto:eterry at highacres.net>> wrote:
> 
>     Is there anyone on the list, or can anyone recommend someone, who can
>     troubleshoot a Linux network connection and also run Ethernet cable in
>     three houses?  The network is between two desktop computers (both
>     running Linux Mint) in two different rooms, connected by Ethernet; it
>     previously worked but no longer does.  Comcast is the Internet
>     provider.
>        All computers involved run either Linux Mint or Ubuntu.  The
>     Ethernet
>     cable needs to run from the room with the Comcast modem to the room
>     with
>     the television, and Ethernet jacks need to be installed in both rooms.
>     I appreciate any help or recommendations.
> 
>     Edward Terry