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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