Internet sharing requires special MTU setting in n...

I'm facing a strange issue with my Lumia 520 when using the Internet sharing feature: the phone nicely establishes a data connection with the 3G network, my notebook PC also nicely connects to the Lumia's WLAN "access point". However data transfer is very poor (when e.g. browsing the web) and times out frequently (at the very same time it works just nicely for the pages when using the phone's browser though). I realized that this issue is somehow related to packet fragmentation/MTU as everything starts to work really nicely when changing the WLAN MTU _on the notebook_ to 1400 (or less). Unfortunately this work around cannot be used with an Android tablet that I also tried, because it does not allow to change the MTU size. The internet sharing feature of the Lumia is almost unusable with that tablet. Did anybody face a similar issue? Any better way to deal with this than manually chaning the MTU size? (Actually I think this is also just a bad work around - I suspect the Lumia's got some problem with fragmentation. I made some tests with packets of different sizes carrying a DF bit (preventing fragmentation). All packets <1400 byte will pass the Lumia, while everything >1400 seems to be dropped.)

I am able to reproduce your findings here with my Nokia Lumia 620 (Amber) and Nokia Lumia 820 (Portico) and Vodafone Germany. My Apple iOS 7, Google Android 4.4, and a Samsung ATIV S (Windows Phone 8, GDR2) all allow 1500 as MTU. Nokia is fixed to 1400. I tested this on my Mac OS X with:
ping -D -s 1372 www.vodafone.de
ping -D -G 1500 -g 448 -h 64 www.vodafone.de
Furthermore, if I use a web-browser like the built-in of Android 4.2, surf via the Nokia Lumia, and I connect to a webpage which is linked with an MTU larger than 1400, like www.vodafone.de itself: The website does not load. Same website works with the same SIM at the same place with my Samsung ATIV S at the same software version.

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Mavericks Internet Sharing requiring restarts

Hey all,
I have been using Internet Sharing on my mid-2011 Macbook Air to provide internet to my iPhone and iPad (through ethernet) for the past few months.While I was running the latest incarnation of Mountain Lion, I often had difficulties with the network being available, but no internet connection being made. I often solved this problem by turning Sharing off and back on again.
Since my upgrade to Mavericks, I have experienced a different problem. I will turn on Internet Sharing and for less than half a second the sharing symbol (the grey wifi symbol with an arrow in it) will appear, before reverting to normal (normal being that the computer is searching for wifi signals). Even though Internet Sharing is 'on', neither of my iOS devices can detect the signal, and there is no indication that the macbook is even broadcasting it.
Often I will need to restart the computer 3-4 times before it works as intended.
Is there anything that I can do to minimise or eliminate this problem?

Hi Pagnamen.
Attached is the menu that I operate Internet Sharing from, as well as what my toolbar looks like when internet sharing is active. In order to turn Internet Sharing on, I go through System Preferences-->Sharing and tick the box you can see highlighted in the bottom left. I have three difficulties:
1. A problem i've had since I have started using the feature (in Mountain Lion). I will have Internet Sharing on for an extended period of time before it simply ceases to send an internet signal.
2. Another problem I have had since I started using the feature. I will begin Internet Sharing and the computer will believe it is operating normally. My iOS devices will receive the connection but will not be able to access the internet. Since Mavericks, this behaviour occasionally continues even after I cancel Internet Sharing...turning wifi off and on again seems to address this anomaly.
3. A new problem originating since my update to Mavericks. I will start Internet Sharing and the "Sharing Icon" (being the grey arrow attached) will appear for only a split-second before being replaced with the standard airport look. My computer will then be hunting for Wifi signals and give no sign that it is Internet Sharing. When this occurs, my devices do not register any wifi. The only solution is to restart my computer, often multiple times. This seems to address the issue.
I will also note that the first two issues have worsened since my update to Mavericks. This means that I can often spend an incredible amount of time simply trying to secure any form of connection that is sustainable.
Thanks again for any help you can render.

How do I (re)set the Internet Sharing password?

I have Internet Sharing set up and working on my computer but I forget how to change the password! Thanks.

Marvin, To stop the pop-up, Go to System Preferences: Security. Check the box next to "Require password to unlock each secure system preference." Then lock Security.
Try this cure for Security update...
http://discussions.apple.com/thread.jspa?threadID=1730909&tstart=0
The locations are actually...
/Library/Preferences/SystemConfiguration/preferences.plist
/Library/Preferences/SystemConfiguration/com.apple.airport.preferences.plist
/Library/Preferences/SystemConfiguration/NetworkInterfaces.plist
/Library/Preferences/SystemConfiguration/com.apple.nat.plist

Internet sharing via dongle, how to set password for wifi network created?

I am using a USB dongle with my Mac book Pro to share internet through AirPort, so that i can access my mac book's wifi from my iphone. This works great, but it is an open network and I woud like to set up a password.
If anyone can point me in the direction I would be very grateful!
Thanks

If you are using OS X's Internet Sharing feature, then you can configure wireless security on your Mac's internal AirPort Card but are limited by the OS X version that you are using. It was not until Mountain Lion that Apple provided WPA2 security. Prior to this only WEP was available.
You configure Internet Sharing via System Preferences > Sharing > Internet Sharing. (I don't have 10.6.x on any of my Macs so this may be different for your case.) Once you configure what is shared, you can then add wireless encryption.

Internet sharing: iMac and G4 PPC Dual Mirror Door via firewire, fire sharing works fine with this set up now need internet sharing

I have already set up file sharing thanks to a query last year, now I need to set up internet sharing, I am using a firewire connection and my ISP has confirmed that their should be not problem in internet sharing between my iMac and my G4 PPC Dual Mirror door but after trying different combinations in the sharing set up I am still drawing a blank on this connection, any help would be appreciated

You have set up file sharing by firewire, right? Now you want to share your iMac's Internet connection with the G4. Does the G4 have an Airport wireless card? If so, set it up that way in System Prefs under Internet Sharing. If the G4 doesn't have an Airport card then you'll need to do it by Ethernet, as in this article http://www.maclife.com/article/howtos/how_share_your_wireless_internet_connectio n_ethernet. But if you do it by Ethernet then your iMac would need to be connected to your modem wirelessly, not by Ethernet, b/c you need the iMac Ethernet port for the connection to the G4. Hope this makes sense.

Internet sharing set up

Hi I am trying to Set up Internet sharing on my iBook g4 with my xbox 360. Having problems getting connected on xbox any advice.

Hmm, well the question is what are you planning on sharing with the Xbox, I've owned a 360 since the realese date and the Windows computers at my home always ask to share multimedia with it (i.e. Music and movies), for any reason the iBook may not work is that it just isnt compatiable or you have wrong software, this forum may not be good, you may want to try a Xbox forum.
If I may, whatever you want to share you can just transfer it from a USB or external HDD, this is what I did before I had the possiblity of online sharing
Cheers, -JP

How do i set up internet sharing

Hi everyone,
had internet sharing on my imac before upgrade to lion, now nothing. Anyone help

Have you tried to set it up afresh?
System Preferences>Sharing, tick Internet Sharing and then from the drop down menu select what connection you want to share. Should be clear from there. Worth adding security using the wifi options button.

Trouble setting up Airport Extreme Card to allow Internet Sharing

Hi,
I just recently purchased a Mac Mini with the Airport Extreme Card, and was able to manage to get it to work to share my Internet connection with my husband's Airport enabled iBook G3...for a few days, and now it appears that the network I created is no longer available.
For the record, I find setting all of this up to be really confusing, and suspect that some of my difficulty lies in not fully understanding what I'm doing as I'm doing it, which makes it hard for me to troubleshoot what's going on.
I've tried using the Airport Utility v5.4.2, but it says it's unable to find any wireless devices, and all the menu options are grayed out.
As always, thanks in advance for any light you can shed on my difficulties.

Duane,
Thanks, that's exactly what I did last week, and it was working for a few days and then for some reason stopped working. However, today, I went into the System Preferences, turned Internet Sharing off and then back on again, and it appears to be working once again.
When you say that's not as reliable a service, I guess my problem is an example of that? With a standalone router (I take it you mean a true Extreme Base Station), what are the advantages? I can't afford to purchase one of those at the moment, but might consider it somewhere down the line.
Nicole

Why does Home Sharing require an active internet connection?

I have noticed when my internet goes down I have real difficulty streaming content to my Apple TV from my iMac. I can see it but I get stuck on the spinning clock. Some audio works OK but video not. This makes no sense. I shouldn't need any internet to access content on a local device.
It seems to be by design, per Troubleshooting Home Sharing (n.4) "Home Sharing requires a home network with an active Internet connection."
But why can I play music but not TV shows? And why is there not an error message instead of spin? In any case why require it at all? I reset the home wireless, and the modem. My ISP confirmed there was cable trouble at that time. When the internet went back up, home sharing worked.

Thanks for the many many replies, Apple User Community. Apple seems to have removed this requirement with the latest software update (7.0.1) for the Apple TV .

I am trying to set up internet sharing from my macbook air but there does not seem to be an option for this because the air is connected to the internet via wifi connection. Is it possible to still share this?

I am trying to set up internet sharing from my macbook air but there does not seem to be an option for this because the air is connected to the internet via wifi connection. Is it possible to still share this?

It depends upon how the other machines are connecting to your MBA:
If the the other machines are also using wi-fi, they can connect directly to the wireless access point (router) without going through your MBA
If the other machines are connecting to the MBA using ethernet you can share your wi-fi connection to them

Application that sets up and starts internet sharing

I'm new to OS X programming and was hoping to get some ideas in solving a problem i'm having.
Need to create an application that will set up internet sharing with specific configurations (Firewire and airport only) and then start it.
I have been playing around with applescript to automate the gui controls of System Preferences and it works pretty good. However its very annoying that the gui needs to be displayed to do this.
MS provides an API called INetSharingConfiguration that enables network connection bridging in visual studio. http://msdn.microsoft.com/en-us/library/aa365935(VS.85).aspx I would be surprised if apple did not provide something of the same, however I have not been able to find it.
Does anyone have knowledge of a framework or API that could be used in xcode to get the same thing done? Suggestions would also be helpful.
Also, If I have to stay with applescripting the gui controls, is there a way to hide the gui when this is activated?

still looking for a good solution but I did come across a plist file that seems to hold these settings. /Preferences/SystemConfiguration/com.apple.nat.plist
Has anyone successfully modified this file and started internet sharing by using it?

Internet Sharing broken (prefs day working, no natd or IP set)

Hi,
Currently I am unable to get internet sharing working at all. I have a connection from Airport that I am trying to share to Built-in Ethernet. I have the firewall turned off. I setup the connection in the Sharing Preference Pane and it looks to have worked fine (I get the confirmation, hit OK and the Start button becomes Stop).
However Built-in Ethernet does not have an IP address (totally empty) and pa awwx | grep -i natd shows that natd isn't even running. It's like the preference pane gives a total no-op, not even a log message that I can find.
I've checked system.log and console.log, nothing there. I've trashed networking and sharing preferences, run software upgrade and fixed disk permissions.
I suspect it is related to Parallels or VMware Fusion, both of which were installed at various points but have now been uninstalled. There are no interfaces out of the ordinary. However the drop down list in the Sharing Pref Pane still shows en2 and en3 as possible sources (but the Network Pref Pane doesn't list these as interfaces at all), this persists after removing the preferences (are these, perhaps, stored in NetInfo somewhere?).
Any similar experiences? Any ideas on how to get this working again would be appreciated.
Thanks,
James

I've found that any one or more of these can affect that...
/Users/nnnn/Library/Preferences/com.apple.internetconnect.plist
/Library/Preferences/SystemConfiguration/preferences.plist
/Library/Preferences/SystemConfiguration/com.apple.airport.preferences.plist
/Library/Preferences/SystemConfiguration/NetworkInterfaces.plist
/Library/Preferences/com.apple.sharing.firewall.plist
/Library/Preferences/com.apple.networkConfig.plist
With those extra Interfaces stored in the 4th one... or created by some Startup/Login Item, like third party Adapters & such.

IPhone - OSX 10.5.6 internet sharing via wifi has packet loss

I try to access the web on the iPhone (for testing purposes) via the bult-in internet sharing capability of my MacBookPro via WiFi. I get very slow connections and high packet loss on distances of less than a foot.
If I activate Internet sharing (eth0 - AirPort) I have packet loss of up to 80% on a Ping to the iPhone. This results in an unusable connection. In this case the iPhone gets a DHCP address from the DSL box (10.0.2.2). Pay attention to the HUGE standard deviation of the packets in case of the internet sharing!!
If anyone has config hints, I appreciate that very much. Does anyone know how to bridge en0 to Airport with WEP enabled?
Internet sharing activated:
--- 10.0.2.2 ping statistics ---
202 packets transmitted, 150 packets received, 25% packet loss
round-trip min/avg/max/stddev = 18.312/1768.538/8198.289/2201.202 ms
If I set up a Computer-Computer network with a WEP password I get no packet loss, but of course I cannot access the internet that way because there is no way in preferences to bridge the networks.
--- 169.254.246.154 ping statistics ---
443 packets transmitted, 442 packets received, 0% packet loss
round-trip min/avg/max/stddev = 1.441/1.983/57.068/2.691 ms
Internet Sharing (ifconfig):
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
inet6 fe80::1%lo0 prefixlen 64 scopeid 0x1
inet 127.0.0.1 netmask 0xff000000
inet6 ::1 prefixlen 128
gif0: flags=8010<POINTOPOINT,MULTICAST> mtu 1280
stf0: flags=0 mtu 1280
en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
inet6 fe80::21b:63ff:fe92:d74%en0 prefixlen 64 scopeid 0x4
inet 192.168.0.17 netmask 0xffffff00 broadcast 192.168.0.255
ether 00:1b:63:92:0d:74
media: autoselect (100baseTX <full-duplex,flow-control>) status: active
supported media: autoselect 10baseT/UTP <half-duplex> 10baseT/UTP <full-duplex> 10baseT/UTP <full-duplex,hw-loopback> 10baseT/UTP <full-duplex,flow-control> 100baseTX <half-duplex> 100baseTX <full-duplex> 100baseTX <full-duplex,hw-loopback> 100baseTX <full-duplex,flow-control> 1000baseT <full-duplex> 1000baseT <full-duplex,hw-loopback> 1000baseT <full-duplex,flow-control> none
fw0: flags=8802<BROADCAST,SIMPLEX,MULTICAST> mtu 4078
lladdr 00:1b:63:ff:fe:77:99:ac
media: autoselect <full-duplex> status: inactive
supported media: autoselect <full-duplex>
en1: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
inet6 fe80::21b:63ff:fec1:e75b%en1 prefixlen 64 scopeid 0x6
inet 169.254.149.180 netmask 0xffff0000 broadcast 169.254.255.255
inet 10.0.2.1 netmask 0xffffff00 broadcast 10.0.2.255
ether 00:1b:63:c1:e7:5b
media: autoselect status: active
supported media: autoselect
en2: flags=8963<UP,BROADCAST,SMART,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
inet6 fe80::21c:42ff:fe00:0%en2 prefixlen 64 scopeid 0x7
inet 10.37.129.2 netmask 0xffffff00 broadcast 10.37.129.255
ether 00:1c:42:00:00:00
media: autoselect status: active
supported media: autoselect
en3: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
inet6 fe80::21c:42ff:fe00:1%en3 prefixlen 64 scopeid 0x8
inet 169.254.149.180 netmask 0xffff0000 broadcast 169.254.255.255
ether 00:1c:42:00:00:01
media: autoselect status: active
supported media: autoselect
C-C Network:
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
inet6 fe80::1%lo0 prefixlen 64 scopeid 0x1
inet 127.0.0.1 netmask 0xff000000
inet6 ::1 prefixlen 128
gif0: flags=8010<POINTOPOINT,MULTICAST> mtu 1280
stf0: flags=0 mtu 1280
en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
inet6 fe80::21b:63ff:fe92:d74%en0 prefixlen 64 scopeid 0x4
inet 192.168.0.17 netmask 0xffffff00 broadcast 192.168.0.255
ether 00:1b:63:92:0d:74
media: autoselect (100baseTX <full-duplex,flow-control>) status: active
supported media: autoselect 10baseT/UTP <half-duplex> 10baseT/UTP <full-duplex> 10baseT/UTP <full-duplex,hw-loopback> 10baseT/UTP <full-duplex,flow-control> 100baseTX <half-duplex> 100baseTX <full-duplex> 100baseTX <full-duplex,hw-loopback> 100baseTX <full-duplex,flow-control> 1000baseT <full-duplex> 1000baseT <full-duplex,hw-loopback> 1000baseT <full-duplex,flow-control> none
fw0: flags=8802<BROADCAST,SIMPLEX,MULTICAST> mtu 4078
lladdr 00:1b:63:ff:fe:77:99:ac
media: autoselect <full-duplex> status: inactive
supported media: autoselect <full-duplex>
en1: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
inet6 fe80::21b:63ff:fec1:e75b%en1 prefixlen 64 scopeid 0x6
inet 169.254.149.180 netmask 0xffff0000 broadcast 169.254.255.255
inet 10.0.2.1 netmask 0xffffff00 broadcast 10.0.2.255
ether 00:1b:63:c1:e7:5b
media: autoselect status: active
supported media: autoselect
en2: flags=8963<UP,BROADCAST,SMART,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
inet6 fe80::21c:42ff:fe00:0%en2 prefixlen 64 scopeid 0x7
inet 10.37.129.2 netmask 0xffffff00 broadcast 10.37.129.255
ether 00:1c:42:00:00:00
media: autoselect status: active
supported media: autoselect
en3: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
inet6 fe80::21c:42ff:fe00:1%en3 prefixlen 64 scopeid 0x8
inet 169.254.149.180 netmask 0xffff0000 broadcast 169.254.255.255
ether 00:1c:42:00:00:01
media: autoselect status: active
supported media: autoselect

I accidentally found a workaround:
1. Activate internet sharing
2. Goto network preferences and use AirPort: "Create network ..."
3. Check require Password and create a C2C network
4. The Airport Icon changes from the up-arrow to the computer icon
5. Connect with the iPhone.
Packet loss is gone and sharing works fine.
BIG BUG: Procedure has to be repeated every time AirPort is turned on/off, as Internet Sharing disables/resets the airport setup!

Internet sharing to get eMac online wirelessly and cheaply

Going to buy an iMac, which I will connect to the internet via ethernet. Would like to put my eMac across the room, but would like it to also be connected. Thing is, it's got no wireless capabilities (no bluetooth or airport card). Can't I get SOMEthing in the thing, then set up internet sharing between the two computers to get the eMac online? Is there a cheap option for me? Thanks in advance.

Do you have an internal wireless network now? Is the Internet access through DSL or cable? Is it necessary to connect the eMac wirelessly? The distance appears to be short. Many wireless routers have a built-in switch with a number of RJ-45 outlets, allowing the Internet to be shared via Ethernet cables (in addition to via the wireless network).
Otherwise, you would have to add an appropriate AirPort card internally, or use a wireless Ethernet bridge connected to the Ethernet port. A wireless Ethernet bridge (there are units from, for example, Belkin , D-Link and Linksys) will work with almost any Ethernet device under almost any operating system (normally, no special driver software is required).
Some people have reported successful use of wireless USB adapters, but there are also many reports about difficulties. If you want to try this, make absolutely sure that there are Mac drivers (suitable for your operating system) for the USB adapter in question.
Jan

Error message about firewall and internet sharing

hello all i have a question regarding the use of firewall and internet sharing.
I have a PMG5 connected to internet through Airport. I've linked an Xbox 360 via the built-in ethernet port in order to access Xbox Live. I had to open specific UDP ports on the OS X firewall but it now works fine. However, in the Sharing Preference Pane, Internet Tab, i still get an error message saying that my Internet Sharing is disturbed by the settings of the firewall and sharing services, it says that i did not activate "personal web sharing" in the first two tabs...but i DID ! And there's no way to get rid of this error message.
I know I know some may consider it's not a real problem because it's just an error message while the connection actually works fine but well, I tend to hate error messages when they're not supposed to show up. So if anyone know the answer, thanks in advance...
Good day to everyone
Vince, Paris...

sorry about the delay in replying, was kinda busy
well trashing the pref files was useless and i tried with another user, same thing. As for the second opinion, the problem was not about which port was used cause as i said the connection sharing works fine and anyway it was the correct port that was checked, it's just that i get an error message while there is no apparent error and everything works fine, i'm told that personal web sharing is not enabled but it is...
Anyway as i said, it's probably not a real matter, as long as it works...which brings me to another thing. I've created a special protocol in the firewall to enable a proper dialog with the xbox. it's basically the same thing you do for ichat AV when you have video connection problems, you track down the concerned UDP port using terminal, you allow traffic and all... The protocol for the xbox worked great for some days, but now it seems it's not enough, the game set keeps trying on another port and i constantly have to update the protocol or deactivate the firewall...and enabling back all UDP traffic is not enough to solve it.
In a way i think everything is linked, the initial error message when everything was fine and the current trouble. Any idea?
thanks
Vince

Internet sharing requires special MTU setting in n...

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