Hi Lindsay,

I've re-read your original and drawn out what I think your set-up is (or
was). A couple of questions that may help formulate an answer.

What model is your D-Link 4G modem/router?

Which device is providing DHCP for you other devices?

Which device (presumably the D-Link) is providing a NAT service?

On 21 August 2017 at 23:31, Ray via luv-main <[email protected]> wrote:

> On 21.08.2017 18:29, Mark Trickett via luv-main wrote:
>
>> Hello Ray,
>>
>> On 8/21/17, Ray via luv-main <[email protected]> wrote:
>>
>>> As suggested by a number of readers, I have gone back to basics and
>>> tried the "simple" approach. I connected the Dlink 4G router direct to
>>> an ethernet port on one of my machines, I simply disconnected the exist
>>> cat5 connector too my hub/switch and connected the Dlink. I tested the
>>> port prior to doing this and it worked OK and I still cannot get it (the
>>> Dlink) to work. ON switching on the device the Docs say the led that
>>> indicates a correct working Lan connction should come on steady and it
>>> does not, its flashing. If its cat5 cable is disconnected this led goes
>>> out and on reconnection comes back flashing. Three different cables were
>>> tried all behaved the same.
>>> Its unlikley that the DLink is faulty (allthough it cannot be completely
>>> ruled out), so for a "Simple" install there still must be some kind of
>>> custom config required.
>>>
>>
>> From the foregoing, I would suspect the Dlink 4G router. I would get
>> the supplier to demonstrate that it is working, going in to a Telstra
>> shop or whomever the supplier is. That will establish a basic working
>> state from which to get it working the way you want. As to ethernet
>> cables, try a known straight through, and crossover cable. Both exist,
>> and they are different. Most modern equipment is supposed to autosene
>> and configure itself, but that too is a failure point.
>>
>>
> I have tried both straight and crossover cables and yes the Dlink is
> supposed to detect wha tthe cable is.
>
> What actually is required for a simple direct on PC install, it appears
>>> standard eth0 setup does not work. Unfortunately when I restored the sim
>>> to my dongle and atarted windows I could NOT get an internet connection.
>>> After transfering the sim I tried my spare dongle this behaved the same
>>> way but worked correctly after it was "rebooted", what ever that does.
>>> Note: powering everything down did no good. I may get a router that will
>>> take dongles directly and see if a can get any more success.
>>>
>>
>> The USB dongles are yet another can of worms, one that I do not wish
>> to chase down a rabbit hole.
>>
>>
> Yes USB dongles can be a problem, but one can usually come up with some
> kind
> of solution. A problem I have found with mobile broadband is I have found
> is that
> some providers DO NOT like sims being swapped between devices, with a 4G
> USB dongle
> router, I can safely swap the dongle between a USB port on WIndows and the
> router
> on Linux and not have the service locked out.
>
> I may say this is P.....g me off no end currently particularly this
>>> comming directly after my main machines mother board failed.
>>> Note: I spent 30 years as a complex systems technician and such problems
>>> do not usually bother me but this is getting ....................... And
>>> not having a decent working internet connection is NOT helping AT ALL
>>> (as I cannot easily search for help).
>>>
>>
>> I have been having trouble getting photos off SD cards, I had a device
>> to plug them into, then a USB port. That died, and the replacement I
>> bought appeared to not work. Now it looks like the otherwise working
>> powered 7 port USB hub is flaky. I now have two ways to read the
>> cards, and a couple that do not work. Why? i would like to know, but
>> do not expect any answers.
>>
>
> Yes it can be a pain. I have 2 SD card readers, one is an external reader,
> the other
> occupies a 5 inch drive bay, I have never had any problems with either. A
> significant
> issue here is that USB while simple to use is VERY complex under the hood
> and the
> more complex something is the more problems one has in the end.
>
> Lindsay
>
>
>
>> Lindsay
>>>
>>
>> Regards,
>>
>> Mark Trickett
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-- 
Colin Fee
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