Re: Intermittent network sharing problem

[kaye and geoff]

Hi,

Just to follow up on our internet sharing problem, with a big thanks to 
everyone who helped. We removed the EDUP wifi router from our network and have 
been able to share files and internet over ethernet. I plugged the EDUP back in 
today. It had no immediate affect (except to successfully share internet 
connection over wifi) but when we re-booted the machines the internet sharing 
on ethernet failed. Took out the EDUP, rebooted, and it all worked.

So it looks as though we need a new wifi router.



Kaye and Geoff
k...@kgweb.org.au





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Re: Intermittent network sharing problem

[kaye and geoff]

Ronni,

> You mention you had this Network setup working prior to a couple of weeks 
> ago, what changed at that time?
Absolutely nothing - it literally failed overnight. We did have a severe 
electrical storm at least a day earlier, but it had worked after the power came 
back.

> There is another device handing our IP Addresses - its as though you have 2 
> devices acting as Routers.

I agree - it does look as though there are two separate devices doing the job.

> The Telstra pre-paid 4G USB modem (ZTE WCDMA Technologies MSM) IP 192.168.0.1
> The EDUP business portable wireless partner (EP-2908) IP 192.168.2.1
> I’m confused with how your Network is actually setup.

We have an ethernet hub (Cisco Linksys SE2800) with CAT5 to four desktop 
machines and into the EDUP (EP-2908), which is plugged into a power source.

The Telstra modem is plugged into USB on my machine, and I have internet and 
file sharing over ethernet turned on.

We have always used the ethernet connection for file and internet sharing - the 
EDUP is just there as a courtesy for clients/friends who have portable devices 
and want to use the net or exchange files with us; we normally wouldn't have 
wifi turned on for any of our machines.

When it all worked I didn't take any notice of the router IP addresses on the 
various machines - it is only now that it has become a bit crucial.

I've just done what I should have done earlier - started from scratch with 
nothing connected and slowly add connections.
I've unplugged everything, then worked through from no modem/no sharing through 
to modem and sharing. It all works perfectly - Geoff can share internet and 
files.
I HAVEN'T added the EDUP wifi device.

We've shut down and rebooted, and it still works. But: I still have 192.168.0.1 
as my router and DNS, and Geoff still has 192.168.2.1 as his router - it isn't 
coming from the EDUP device, which isn't plugged in; it is coming from me.

So, we'll leave it like this for now, with no wifi, and see if it continues to 
work. We've had it working briefly before, only to have it fail the next time 
we rebooted. If it is still working in a few days time I'll re-introduce the 
EDUP and see if it causes a problem.

Thanks for all your help and for getting me thinking - I need someone else to 
talk to about this stuff to see it all a bit clearer

Cheers, K


Kaye and Geoff
k...@kgweb.org.au





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Re: Intermittent network sharing problem

[Ronni Brown]

Hi Kaye,

You mention you had this Network setup working prior to a couple of weeks ago, 
what changed at that time?

There is another device handing our IP Addresses - its as though you have 2 
devices acting as Routers.
The Telstra pre-paid 4G USB modem (ZTE WCDMA Technologies MSM) IP 192.168.0.1
The EDUP business portable wireless partner (EP-2908) IP 192.168.2.1

What is the setup of the EDUP business portable wireless partner (EP-2908)?
And how is it connected?

I’m confused with how your Network is actually setup.

Cheers,
Ronni

> On 30 Mar 2016, at 10:15 PM, kaye and geoff  wrote:
> 
> Hi Ronni,
> 
>> Your Router/Gateway Address is 192.168.0.1
>> System Preferences  > Network - Advanced > TCP/IP
>> Configure IPv4: Using DHCP
>> IPv4 Address: 192.168.0.xx   (this will change automatically because you are 
>> using DHCP)
>> Subnet Mask: 255.255.255.0
>> Router: 192.168.0.1 should stay the same
>> DNS Server should be the same as the Router: 192.168.0.1 
> 
> All that is true for me, but I've just booted up one of the old machines and 
> checked it out:
> 
> IPv4 uses DHCP
> IPv4 address 192.168.2.xx
> Subnet mask 255.255.255.0
> Router 192.168.2.1
> 
> Right now I have manually set the DNS server to 192.168.0.1 and it is 
> working. If I reboot it may just stop again.
> 
> Geoff's machine is connected using wifi and it is working despite the 
> following settings:
> IPv4 address 192.168.2.xx
> Subnet mask 255.255.255.0
> Router 192.168.2.1
> DNS is set to 192.168.2.1
> 
> I'm finding this extremely frustrating - I'm not sure how we can be getting 
> different router and DNS IP numbers, and I cannot explain why the wifi is 
> seeing the shared internet connection on ethernet when nothing else can. 
> Despite the different IP numbers we can still file share. I have tried 
> cutting out the Cisco hub - just a single cable between our two machines. 
> Again, we could file share but not share the internet connection.
> 
> Thanks for trying to help. Kaye
> 
> 
> 
> Kaye and Geoff
> k...@kgweb.org.au 
> 
> 
> 
> 
> 
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Cheers,
Ronni

13-inch MacBook Air (April 2014)
1.7GHz Dual-Core Intel Core i7, Turbo Boost to 3.3GHz
8GB 1600MHz LPDDR3 SDRAM
512GB PCIe-based Flash Storage

El Capitan OS X 10.11.4

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Re: Intermittent network sharing problem

[kaye and geoff]

Hi Ronni,

> Your Router/Gateway Address is 192.168.0.1
> System Preferences  > Network - Advanced > TCP/IP
> Configure IPv4: Using DHCP
> IPv4 Address: 192.168.0.xx   (this will change automatically because you are 
> using DHCP)
> Subnet Mask: 255.255.255.0
> Router: 192.168.0.1 should stay the same
> DNS Server should be the same as the Router: 192.168.0.1 

All that is true for me, but I've just booted up one of the old machines and 
checked it out:

IPv4 uses DHCP
IPv4 address 192.168.2.xx
Subnet mask 255.255.255.0
Router 192.168.2.1

Right now I have manually set the DNS server to 192.168.0.1 and it is working. 
If I reboot it may just stop again.

Geoff's machine is connected using wifi and it is working despite the following 
settings:
IPv4 address 192.168.2.xx
Subnet mask 255.255.255.0
Router 192.168.2.1
DNS is set to 192.168.2.1

I'm finding this extremely frustrating - I'm not sure how we can be getting 
different router and DNS IP numbers, and I cannot explain why the wifi is 
seeing the shared internet connection on ethernet when nothing else can. 
Despite the different IP numbers we can still file share. I have tried cutting 
out the Cisco hub - just a single cable between our two machines. Again, we 
could file share but not share the internet connection.

Thanks for trying to help. Kaye



Kaye and Geoff
k...@kgweb.org.au





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Re: Intermittent network sharing problem

[Ronni Brown]

Hi Kaye,

> On 30 Mar 2016, at 3:23 PM, kaye and geoff  wrote:
> 
> Hi Ronni,
> 
>> ethernet hub: Cisco Linksys SE2800
>> Are the LED (lights) on each port indicating connected?
> 
> Connected and active - external indicators are all good
> 
> I really think that the different router numbers are a bit of a clue to what 
> is happening. Can you tell me where the router numbers come from? Is it the 
> Cisco hub? I need to sort out why the other machines on the network have a 
> different router number from me; I think that may be crucial.

I agree.
Your Router/Gateway Address is 192.168.0.1

System Preferences  > Network - Advanced > TCP/IP
Configure IPv4: Using DHCP
IPv4 Address: 192.168.0.xx   (this will change automatically because you are 
using DHCP)
Subnet Mask: 255.255.255.0
Router: 192.168.0.1 should stay the same

DNS Server should be the same as the Router: 192.168.0.1 

Why your setup is not doing this I don’t understand unless it is a different 
setup due to the Telstra Dongle & sharing the connection?
> 
> We may just get another modem, but I hate not figuring out what is happening 
> and fixing it!
> 
> Cheers, K
> 
> 
> Kaye and Geoff
> k...@kgweb.org.au 
> 

Cheers,
Ronni

13-inch MacBook Air (April 2014)
1.7GHz Dual-Core Intel Core i7, Turbo Boost to 3.3GHz
8GB 1600MHz LPDDR3 SDRAM
512GB PCIe-based Flash Storage

El Capitan OS X 10.11.4

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Re: Intermittent network sharing problem

[kaye and geoff]

Hi Ronni,

> ethernet hub: Cisco Linksys SE2800
> Are the LED (lights) on each port indicating connected?

Connected and active - external indicators are all good

I really think that the different router numbers are a bit of a clue to what is 
happening. Can you tell me where the router numbers come from? Is it the Cisco 
hub? I need to sort out why the other machines on the network have a different 
router number from me; I think that may be crucial.

We may just get another modem, but I hate not figuring out what is happening 
and fixing it!

Cheers, K


Kaye and Geoff
k...@kgweb.org.au





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Re: Intermittent network sharing problem

[Ronni Brown]

Hi Kaye,

Yes, a really frustrating situation. I hate it when Networks don’t act as they 
should.
My Notes which you have most likely checked (a dozen times) in colour below:
 
EDUP business portable wireless partner (EP-2908) router/ap/repeater has one 
WAN/LAN port
So I realise why you are sharing your Internet connection.

ethernet hub: Cisco Linksys SE2800
Are the LED (lights) on each port indicating connected?
The Linksys hub or switch’s front or rear panel will indicate the status of the 
connection.  
Power LED indicator - LED button - Port LED status indicators

Port LED status indicators: 

•   Yellow LED – The Yellow LED lights up and flashes to indicate network 
activity over that port.

•   Green LED – The Green LED lights up when the local network port is 
connected to a 1000 Gigabit port (SE2500 and SE2800 only); if not, the speed is 
10/100 Mbps.

Your comment:
> We are getting to the stage where we might just buy another dongle for Geoff 
> and give up trying to share mine. The wifi does drop out at times and it 
> isn't a satisfactory way to work.

Yes, I think I would be purchasing another dongle for Geoff ;-)

Cheers,
Ronni

> On 30 Mar 2016, at 9:06 AM, kaye and geoff  wrote:
> 
> Hi Ronni,
> 
>> The details look setup correctly - Router and DNS settings. You are not 
>> having self-assigned IP addresses 169.
>> Gateway 192.168.0.1 - 255.255.255.0 Subnet Mask
>> Are all on the same Subnet Mask?
> 
> Yes, but I've just made it work (for now!) doing the following:
>booted up one of my heritage machines, manually set 192.168.0.1 as the 
> ethernet DNS server
>came back to my machine and manually set up 192.168.0.1 as the ethernet 
> DNS server
> 
> and that worked! Geoff's machine, currently using the wifi connection, still 
> works, although it currently shows 192.168.2.1 as the DNS server
> 
> While doing that I saw that the modem on my machine has the router as 
> 192.168.0.1 but the router on the old machine is 192.168.2.1
> I think that this latter info is a pointer to what is going wrong - these 
> machines have, for some reason ended up pointing to different IP addresses, 
> none of them local.
> 
> None of this has stopped us sharing files/disks on the network, and prior to 
> it all going wrong I changed nothing at all in any network settings on any of 
> the hardware.
> …
> Despite getting it to work I removed the manual DNS settings, shut everything 
> down, tried a PRAM reset. Booted everything up, with no connection. Reset the 
> manual DNS - it didn't work this time. I'll try it again tomorrow. Like the 
> subject of this email says - intermittent and unpredictable. We are back to 
> wifi, which is still working.
> 
> We are getting to the stage where we might just buy another dongle for Geoff 
> and give up trying to share mine. The wifi does drop out at times and it 
> isn't a satisfactory way to work.
> 
> Cheers, K
> 
> 
> Kaye and Geoff
> k...@kgweb.org.au 
> 

Cheers,
Ronni

13-inch MacBook Air (April 2014)
1.7GHz Dual-Core Intel Core i7, Turbo Boost to 3.3GHz
8GB 1600MHz LPDDR3 SDRAM
512GB PCIe-based Flash Storage

El Capitan OS X 10.11.4

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Re: Intermittent network sharing problem

[kaye and geoff]

Hi Ronni,

> The details look setup correctly - Router and DNS settings. You are not 
> having self-assigned IP addresses 169.
> Gateway 192.168.0.1 - 255.255.255.0 Subnet Mask
> Are all on the same Subnet Mask?

Yes, but I've just made it work (for now!) doing the following:
   booted up one of my heritage machines, manually set 192.168.0.1 as the 
ethernet DNS server
   came back to my machine and manually set up 192.168.0.1 as the ethernet DNS 
server

and that worked! Geoff's machine, currently using the wifi connection, still 
works, although it currently shows 192.168.2.1 as the DNS server

While doing that I saw that the modem on my machine has the router as 
192.168.0.1 but the router on the old machine is 192.168.2.1
I think that this latter info is a pointer to what is going wrong - these 
machines have, for some reason ended up pointing to different IP addresses, 
none of them local.

None of this has stopped us sharing files/disks on the network, and prior to it 
all going wrong I changed nothing at all in any network settings on any of the 
hardware.
…
Despite getting it to work I removed the manual DNS settings, shut everything 
down, tried a PRAM reset. Booted everything up, with no connection. Reset the 
manual DNS - it didn't work this time. I'll try it again tomorrow. Like the 
subject of this email says - intermittent and unpredictable. We are back to 
wifi, which is still working.

We are getting to the stage where we might just buy another dongle for Geoff 
and give up trying to share mine. The wifi does drop out at times and it isn't 
a satisfactory way to work.

Cheers, K


Kaye and Geoff
k...@kgweb.org.au





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Re: Intermittent network sharing problem

[Ronni Brown]

Thanks Kaye,

The details look setup correctly - Router and DNS settings. You are not having 
self-assigned IP addresses 169.
Gateway 192.168.0.1 - 255.255.255.0 Subnet Mask
Are all on the same Subnet Mask?

Normally I would suggest removing the SystemConfiguration preference files, IF 
you were having self-assigned IP address.
But as you are not, I don’t think that is going to solve this.

What you could try on the machines that are not connecting to the internet:
PRAM reset… I know you don’t require details how to do this but in case others 
are following I’ll include them.
1. Shut down the computer.
2. Locate the following keys on the keyboard: Command, Option, P, and R. You 
will need to hold these keys down simultaneously in step 4.
3. Turn on the computer.
4. Press and hold the Command-Option-P-R keys. You must press this key 
combination before the gray screen appears.
5. Hold the keys down until the computer restarts and you hear the startup 
sound for the fourth time.
6. Release the keys.
I have always waited for four startup tones to insure a proper PRAM reset: this 
goes back to the days of OS 6. 

I have to leave to a job now, but will give your email more attention when I 
get back home.

Cheers,
Ronni

> On 29 Mar 2016, at 10:44 PM, kaye and geoff  wrote:
> 
> Hi,
> 
>> We might require more details on what Telstra Dongle you are using and the 
>> Network settings you have.
> 
> Telstra pre-paid 4G USB modem (ZTE WCDMA Technologies MSM), working just fine 
> for my machine
> EDUP business portable wireless partner (EP-2908), also working fine
> 
> On network settings I have the dongle first, followed by ethernet. 
> IP uses DHCP
> Router and DNS settings are 192.168.0 numbers
> I share my connection from the modem to ethernet
> We use an ethernet hub: Cisco Linksys SE2800
> My machine is running OS X10.8.2
> 
> 
>> The dongle is connected to your Mac so the dongle would only see your 
>> machine, the Mac would be handling all the local IP assignment NAT and data?
> 
> That is right
> 
>> You have 'Internet Sharing' turned on in System Preferences > Sharing?
> 
> Yes - this has been working for around two years, and nothing had been 
> changed; got up one morning, turned it on, and it had just stopped sharing
> 
>> Do you have any Proxy server or firewall setting blocking DNS servers?
> 
> No - remember, the wifi router plugged into the ethernet network is seeing 
> and sharing the connection from my machine - it is getting out onto the 
> ethernet and being broadcast, and we are using it to get internet on Geoff's 
> machine. However I have heritage machines on the network with no airport - 
> they can no longer connect.
> 
>> Sounds like you are picking up local IP addresses but not Public IP 
>> addresses.
> 
> Not really - the ethernet addresses on the other machines are perfectly 
> normal (192.168.0.*) - not local, but assigned by the router. If they were 
> local I'd expect them to be 169… numbers. The router address also looks fine. 
> I did have a period where we were seeing local IP addresses on the other 
> machines, but re-booting everything sorted that out.
> 
>> Without seeing your setup or knowing what Modem & Wi-Fi router you’re using 
>> its difficult to offer any suggestions.
> 
> I did try one other thing when we were first faced with trying to get it all 
> to work again. I manually set the ethernet DNS server address to that of the 
> modem. This appeared to work instantly - everything came back on-line, and 
> stayed up all day. I thought I had solved it. When we turned the machines on 
> next morning, same settings, it failed again, and has never worked since. 
> I've turned it back to automatic.
> 
> Trolling Google turned up some suggestions, including deleting
> /Library/Preferences/SystemConfiguration/com.apple.nat.plist
> /Library/Preferences/SystemConfiguration/NetworkInterfaces.plist 
> /Library/Preferences/SystemConfiguration/com.apple.airport.preferences.plist
> but I'm not sure that this would do anything useful in this case. Do you 
> think it worth a go? Another suggestion is to use the unix commands to shut 
> down the ethernet connection and re-starts it. I can do this, but can't see 
> that it is any different from doing it through system preferences, and I've 
> already tried that.
> 
> Cheers, K
> 
> 
> 
> Kaye and Geoff
> k...@kgweb.org.au 
> 

Cheers,
Ronni

13-inch MacBook Air (April 2014)
1.7GHz Dual-Core Intel Core i7, Turbo Boost to 3.3GHz
8GB 1600MHz LPDDR3 SDRAM
512GB PCIe-based Flash Storage

El Capitan OS X 10.11.4

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Re: Intermittent network sharing problem

[kaye and geoff]

Hi,

> We might require more details on what Telstra Dongle you are using and the 
> Network settings you have.

Telstra pre-paid 4G USB modem (ZTE WCDMA Technologies MSM), working just fine 
for my machine
EDUP business portable wireless partner (EP-2908), also working fine

On network settings I have the dongle first, followed by ethernet. 
IP uses DHCP
Router and DNS settings are 192.168.0 numbers
I share my connection from the modem to ethernet
We use an ethernet hub: Cisco Linksys SE2800
My machine is running OS X10.8.2


> The dongle is connected to your Mac so the dongle would only see your 
> machine, the Mac would be handling all the local IP assignment NAT and data?

That is right

> You have 'Internet Sharing' turned on in System Preferences > Sharing?

Yes - this has been working for around two years, and nothing had been changed; 
got up one morning, turned it on, and it had just stopped sharing

> Do you have any Proxy server or firewall setting blocking DNS servers?

No - remember, the wifi router plugged into the ethernet network is seeing and 
sharing the connection from my machine - it is getting out onto the ethernet 
and being broadcast, and we are using it to get internet on Geoff's machine. 
However I have heritage machines on the network with no airport - they can no 
longer connect.

> Sounds like you are picking up local IP addresses but not Public IP addresses.

Not really - the ethernet addresses on the other machines are perfectly normal 
(192.168.0.*) - not local, but assigned by the router. If they were local I'd 
expect them to be 169… numbers. The router address also looks fine. I did have 
a period where we were seeing local IP addresses on the other machines, but 
re-booting everything sorted that out.

> Without seeing your setup or knowing what Modem & Wi-Fi router you’re using 
> its difficult to offer any suggestions.

I did try one other thing when we were first faced with trying to get it all to 
work again. I manually set the ethernet DNS server address to that of the 
modem. This appeared to work instantly - everything came back on-line, and 
stayed up all day. I thought I had solved it. When we turned the machines on 
next morning, same settings, it failed again, and has never worked since. I've 
turned it back to automatic.

Trolling Google turned up some suggestions, including deleting
/Library/Preferences/SystemConfiguration/com.apple.nat.plist
/Library/Preferences/SystemConfiguration/NetworkInterfaces.plist 
/Library/Preferences/SystemConfiguration/com.apple.airport.preferences.plist
but I'm not sure that this would do anything useful in this case. Do you think 
it worth a go? Another suggestion is to use the unix commands to shut down the 
ethernet connection and re-starts it. I can do this, but can't see that it is 
any different from doing it through system preferences, and I've already tried 
that.

Cheers, K



Kaye and Geoff
k...@kgweb.org.au





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Re: Intermittent network sharing problem

[Ronni Brown]

Hi Kaye,

We might require more details on what Telstra Dongle you are using and the 
Network settings you have.
The dongle is connected to your Mac so the dongle would only see your machine, 
the Mac would be handling all the local IP assignment NAT and data?
You have 'Internet Sharing' turned on in System Preferences > Sharing?
Do you have any Proxy server or firewall setting blocking DNS servers?
Sounds like you are picking up local IP addresses but not Public IP addresses.

Without seeing your setup or knowing what Modem & Wi-Fi router you’re using its 
difficult to offer any suggestions.

Cheers,
Ronni

13-inch MacBook Air (April 2014)
1.7GHz Dual-Core Intel Core i7, Turbo Boost to 3.3GHz
8GB 1600MHz LPDDR3 SDRAM
512GB PCIe-based Flash Storage

El Capitan OS X 10.11.4


> On 29 Mar 2016, at 5:27 PM, kaye and geoff  wrote:
> 
> Hi,
> 
> We've been living with our internet sharing problems for a couple of weeks 
> now, with no solution.
> 
> I share our wireless connection over ethernet to three other machines and a 
> wifi router. The sharing failed overnight a couple of weeks ago; we can still 
> mount disks over ethernet, and the IP addresses all look good, but the other 
> machines fail to access the internet using the ethernet sharing I'm 
> providing; network preferences thinks they are connected, but all 
> applications fail - they just time out, then give a "no internet connection" 
> message.
> 
> You might think that my machine has failed, and no longer provides internet 
> sharing, but this isn't the case - the wifi router is on the same ethernet 
> network, and it broadcasts the shared connection, so currently we are limping 
> along with that.
> 
> I've turned everything off and on countless times. I've also removed and 
> re-created the ethernet service. I'm hoping someone can suggest other things 
> I can try. For example, are there any .plist files I can try deleting to see 
> if that helps restore our sharing?
> 
> Cheers, Kaye
> 
> Kaye and Geoff
> k...@kgweb.org.au 
> 


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Re: Intermittent network sharing problem

[kaye and geoff]

Hi,

We've been living with our internet sharing problems for a couple of weeks now, 
with no solution.

I share our wireless connection over ethernet to three other machines and a 
wifi router. The sharing failed overnight a couple of weeks ago; we can still 
mount disks over ethernet, and the IP addresses all look good, but the other 
machines fail to access the internet using the ethernet sharing I'm providing; 
network preferences thinks they are connected, but all applications fail - they 
just time out, then give a "no internet connection" message.

You might think that my machine has failed, and no longer provides internet 
sharing, but this isn't the case - the wifi router is on the same ethernet 
network, and it broadcasts the shared connection, so currently we are limping 
along with that.

I've turned everything off and on countless times. I've also removed and 
re-created the ethernet service. I'm hoping someone can suggest other things I 
can try. For example, are there any .plist files I can try deleting to see if 
that helps restore our sharing?

Cheers, Kaye

Kaye and Geoff
k...@kgweb.org.au





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