Split DNS with internet sharing

Hi
I'm running a Mac mini as a server, with Internet sharing on its wifi. Since NAT'd addresses connecting to the machine's outside interface performs rather poorly, I was wanting to run some form of split dns for local domains - so connecting to, say, smtp and imap would hit 10.0.2.1 instead of the external IP.
As it turns out, I'm already running two copies of named - one to serve the domains on the system (out of /usr/local), and the other one running Internet sharing through the /etc/com.apple.named.conf.proxy config file. Since my changes wouldn't "stick" in that file, running a separate copy seemed to make sense for me. But now I want to change the behavior of the named used for Internet sharing to give out different results. Has anybody figured out a way to do this that is sane (won't break on reboot/OS upgrade/etc)?

Anybody?

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AppleTV don't show in iTunes with internet sharing on

Dear all,
I have a problem with my new appletv. I'm sharing internet connection via ethernet on my iMac directly connected to a linksys access point. tv have a wireless connection to the linksys and the ethernet ip address of my iMac as a gateway. With internet sharing on my iTunes don't show tv and don't synchronize with it.
My current setup is iTunes 8.1 and tv 2.3.1 firmware. With previous firmware release all is ok.
Any suggestion? Is it possible to use internet sharing and iTunes sync at the same time?

Songs will only show up if they are in the library. Did you copy the music from your old iTunes library and load it on the new computer?

Using Airport Express with Internet Sharing in Leopard

Howdy all,
I have Internet Sharing enabled on my MacBook Pro running Leopard 10.5.4. I use a Sprint Sierra Wireless Aircard 597E modem to connect to the Internet.
I'm trying to get my Airport Express & Time Machine to recognize my MacBook Pro, or the other way around. Basically, I want to be able to access the Airport Express to wirelessly play music through a pair of speakers and be able to access the Time Machine for backups & accessing files.
With Internet Sharing enabled, my iPhone can access the web, so I believe I have the sharing set up correctly. However, I can't see the Time Machine and my Airport Express just keeps blinking amber.
Does anyone know what I might need to do to resolve this issue?
Any help is so very very much appreciated!

Thanks Kappy,
I'm not sure you're exactly following me on this one, though. Here's what I've discovered on my own for anyone else facing the same situation I am:
1. You /cannot/ use Airport Express while using Leopard's Internet Sharing.
2. If you want to create a local network, in this situation, you'll need to use Time Capsule to establish the initial local network, then join the Airport Express into that network. At that point you can use Time Machine with Time Capsule, access it as a hard drive and use AirTunes with the Airport Express.
But you cannot use the Sprint AirCard (and I assume any other similar setup) and your Mac with Internet Sharing to build the local network and then join the other devices to it. Unfortunately.

AirPort Express wireless connection, when I surf the news sites so I linked to **** pages. And must close the window. If I use my iPhone with Internet sharing the same computer, then I have no problem. I believe that it is in AirPort Express, and wou

AirPort Express wireless connection, when I surf the news sites so I linked to **** pages. And must close the window. If I use my iPhone with Internet sharing the same computer, then I have no problem.
I believe that it is in AirPort Express, and would have to clean it. How do you do that?

You need to use the Express in router mode.. I think you are trying to use it in bridge mode.. but you need to give us a lot more details.. screenshots might help more than anything.

Issue with Internet Sharing

Hey folks,
Just wondering if anyone has encountered something like this. I'm using my imac to share it's internet connection wirelessly with several clients (not a perfect scenario i know) and the clients hog the bandwidth. I was wondering if theres a way to limit the bandwidth that is shared. For example. Have the host using 75% of bandwidth and clients using 25% between them.
Any info would be greatly appericiated
Cheers
Nick

I know that apple have released a rubbish version of mac that has problemos with internet sharing
so here is da answer
1. go to finder>(computer name)>macintosh HD>library>preferences
2. copy the entire systemconfiguration folder and systemconfiguration.old folder to your desktop
3. restart mac and device which you share intenet to
then you have internet that is about 3x slower than the da 10.7.3 intenet sharing, but works
then, just wait for apple to release da 10.7.4 fixed
please use da steps!

Open DNS and internet sharing

I am seeing strange behavior, and wondering if anyone has a thought about what is going on.
I am at a hotel with fast internet service over ethernet, but, for whatever reason, DNS seems very slow if I use DHCP to connect (timeouts of 5-10 secs to get to a new site). If I switch to DHCP with fixed DNS, and use the Open DNS servers (208.67.222.222, 208.67.220.220) the latency issues go away.
The interesting thing is that I am sharing the internet connection over Airport to my wife's computer (she connecting thru DHCP). If I use a fixed DNS for MY computer, then her computer cannot connect thru internet sharing. But if I use the (slow) DHCP connection, then she can connect through mine. I have not tried setting up her computer with a fixed DNS, as she really doesn't like me to change settings on her computer
Is this a known limitation of internet sharing, or is there something I should know?
TIA

In more detail, if my ethernet (the computer that is doing the sharing), is set up with Configure: Using DHCP, and DNS Server: 208.67.222.222, 208.67.220.220 (in Network Panel for Ethernet), then the computer connecting thru Internet Sharing in Sharing Panel is not able to access some or all resources thru http (ie, pages fail to load, or do not fully load).
However, if I clear the DNS Server part in the Network Panel, thereby using the the DNS Servers supplied by the hotel, then my computer's connection to the internet is slower, with long waits (presumably due to a slow DNS server), but computers accessing the internet via Airport thru my shared connection are able to browse the internet successfully.
I suspect that when I have a fixed DNS server in my computer, that fact is not broadcast to computers using the shared connection. But I am not an expert in TCP/IP, and may well be confused about how DHCP, DNS, and Apple's Internet Sharing work together.
Thanks for any ideas you have
A

If you can't get web pages with internet sharing, do this.

I could not find anything about this so I'm posting it for others, seeing as it took me a day to figure out!
I set up a wired Bellsouth Ethernet Mini running 10.4 for internet sharing. I had a MacBook laptop to share the connection. The laptop worked with mail but Safari would not load web pages. It took all day but I realized that the laptop was not getting the DNS from the Mini.
I found out the DNS numbers for Bellsouth and entered them (on the laptop) in the Airport TCP/IP box in Sys. Pref, Networking, "Show Airport" TCP/IP DNS box: 205.152.144.23. I'm told that 8.8.8.8 will also work (Google's public DNS server) but I have not tried it on the laptop but it worked with my iPhone.
As soon as I put those numbers in there Safari sprang to life (on both laptop and iPhone) and worked great.
I don't know why the Mini did not "share" the Bellsouth DNS address with the laptop. I hope this helps someone save a day of hair-pulling and frustration!
Al
www.ancins.com
Message was edited by: al1776
Message was edited by: al1776
Message was edited by: al1776

I've already done this, to no avail............

Touble with Internet Sharing since latest Aiport Update

Up to yesterday I was able to share seamlessly my internet connection on my iMac using built in airport as a router. Since the last update, every time I open internet sharing is running on my iMac while connected to the internet, sharing my connection from ethernet using Airport within 30 second of my iPod been connected to my Wireless signal my internet connection die, and can no longer access the internet with my iMac or iPod. The only way to get back my internet connection is to disable internet sharing in system preference.
AirPort Card Information:
Wireless Card Type: AirPort Extreme (0x14E4, 0x87)
Wireless Card Locale: Worldwide
Wireless Card Firmware Version: Broadcom BCM43xx 1.0 (5.10.38.27)
Current Wireless Network: Airport
Wireless Channel: 11
Help

Just to be clear,
1. You are connecting fine on your iPhone (meaning that you have the 3 bars next to your Carrier in the top left of the screen)
2. you can't access the internet on you iPhone
Correct?

Problems with internet sharing/network connection/ethernet and XBOX 360

So basically I have a sent my Mac Book Pro 13" (Snow Leopard) away to be fixed, and in return I got a loan Mac Book Pro 15" (Lion). In the two weeks my Mac book was away getting fixed I purchased an XBOX 360, because of my location I am unable to use wireless on my XBOX, so instead I connect the loan Mac Book to the XBOX 360 via network cable.
This worked fine and I could now connect to XBOX Live and be on the Mac Book at the same time.
So today my Mac Book (13") is returned, I connect everything up exactly the same also changing the settings on internet sharing making sure that it can be used to send the connection to other devices via ethernet.
But it just wont connect.
The XBOX doesnt find the connection like it did before, and it also doesnt register on the MAC Book either.
I've tried different cables, the same cable I used where it worked before.
I've tried turning of Virus protection.
Both still at both ends it is not registering a connection, I have used this Mac Book before through a network cable so I dont think there is a problem there, to my knowledge everything is the same as I did on the other Mac Book but this one does work.
Have you any advice or tips on how to get this to work?
Thanks for your time.

What I did to get my network running again (although I still haven't found out why DHCP has stopped working):
1. Open the Control Panel of the computer that's trying to connect to the network (not the computer sharing the internet connection)
2. Go to 'Network' panel, and select the AirPort connection
3. Under the 'TCP/IP' tab, change 'Configure IPv4' pull-down menu from 'Using DHCP' to 'Manually'.
4. Enter an IP address between 10.0.2.2 and 10.0.2.256 (I randomly chose 10.0.2.40), a Subnet Mask of 255.255.255.0, and enter 10.0.2.1 in the Router box.
5. Click "Apply now"
The computer should now be connected to the network, and able to access the internet. If not, you may need to manually enter a DNS server - put '4.2.2.1' (or an IP for a DNS server provided by your ISP) into the 'DNS Servers' box.
You need to do that process for each computer you're trying to connect to the shared network, making sure you enter a different IP Address for each.

Firewall interfering with Internet Sharing?

Hello -- I have an iMac (let's call it "iMac 1") physically connected to a cable modem, and, using Internet Sharing on that machine, I can connect to it via AirPort with another iMac ("iMac 2") and access the internet without any problems. However, when I activate the firewall on iMac 1, I can no longer access the internet with iMac 2. I know it's a good idea to use the firewall. What should I be doing differently in order to make this work?
Thanks,
Dieter

You may want to ask this question in the Tiger forums (Getting Online and Networking). I had a look there just now, and there is a bit of discussion about Internet sharing and firewall use. I did not find anything directly on point, but then again I did not look through each discussion on the issue. Some of the posts seemed to suggest that perhaps you could not have the firewall enable on you iMac 1, or that to do so, you need to open certain ports to share the connection with iMac 2. Sorry I cannot be of more assistance.

New iMac won't sleep with internet sharing on

Less than 3 month old iMac (core i5) has stoppped being able to sleep when Internet Sharing is enabled. It took me a good while to narrow it down to that but I've confirmed that when Internet sharing is off, it will sleep as it's supposed to. When sharing is on though, not only will it not automatically sleep per the energy saver setting, it wo'nt even sleep when forced with the Apple command. The display will turn off, but the machine does not sleep. I can tell by the facts that my wifi access on my iPhone continues to run off the iMac, and the Caps lock on the keyboard remains lit. (Too bad the blinking LED is no more on the new iMacs).
Sleep was working fine when I first got the new machine; it seems to have stopped shortly after I upgraded to Lion. (I think it may have been working for a few days after installing Lion, but I'm not positive...I'm thinking now I just thought it was asleep because the display would turn off.)
I've looked at all the related sleep posts I could find but nothing seems to address this particular issue. I know I could just turn off sharing whenver I want it to sleep, but tha't's like having to disconnect my car battery when I want to shut the car off.
Any help is appreciated.
Thanks,
Jamie

Well, I'm certainly no expert at this and I'd never enable internet sharing (being too concerned about the health of my Mac and/or not knowing what untoward sites/networks/people may be seeking access), but it seems to me that having it turned on means that your computer is sharing a connection, so anytime anyone on the network seeks access, it will either wake up the Mac or cause it to stay awake. Here is an excerpt from the Help Menu (in Finder) (which has nothing to do with your question, but I found it interesting nonetheless):
If your Internet connection and your local network use the same port (Ethernet, for example), investigate possible side effects before you turn on Internet sharing. In some cases (if you use a cable modem, for example) you might unintentionally affect the network settings of other ISP customers, and your ISP might terminate your service to prevent you from disrupting its network.

Airport Express won't work simultaneously with Internet Sharing

I just purchased two Intel-based iMacs (each with standard configuration including Airport cards), and 1 AX. I placed iMac #1 in Room #1 (near my cable outlet), iMac #2 in Room #2, and the AX in Room #3, along with powered speakers. Using an Ethernet cable, I connected iMac #1 to my cable modem (and its broadband internet connection). I then turned on Internet Sharing, so that iMac #2 now connects to the internet through iMac #1. I also placed the AX in another room and connected it to powered speakers. Here's the problem: Airtunes only works (i.e., the AX-connected powered speakers only show up in iTunes) when I turn off Internet Sharing. The powered speakers "disappear" from iTunes as soon as I turn Internet sharing back on.
Is there any way to fix this?

I assume that you are having this problem with iMac #1 which is doing the sharing... Perhaps this happens because iTunes will not cross subnets.
Even though iMac #1 exists on both subnets (the Ethernet one and the one created by Internet sharing) it appears that iTunes is not using the subnet created by Internet sharing. Therefore it won't cross between the Ethernet subnet and wireless subnet.
The solution is to get an inexpensive wireless router and use that instead of iMac #1 to create your wireless network.

Help with internet sharing to a PS2

Hey, I've been trying to share internet from AirPort to the PS2 with a crossover cable, and when I try to set it up it times out. Does anyone know what I have to do to make it work? Thanks.

"share internet from AirPort"
Does this mean:
(a) the PS2 is cabled to an Airport Base Station
(b) the PS2 is cabled to the ethernet port of a Mac, that Mac receives its internet connection via its Airport wireless network interface
If (b) then:
(1) see Sharing your Internet connection
(2) turn off the OS X firewall in System Preferences->Sharing->Firewall
(3) configure the PS2 to obtain an IP address automatically using DHCP
This sort of setup always sounds like a great idea until you actually try to make it work - and I can't remember ever hearing from someone who got it to work successfully (though many have asked about it). Good luck!

Firewall fails to cooperate with internet sharing

Here's my home network setup:
DSL ←Ethernet→ MacBook ←AirPort→ iBook.
The idea is to share the MacBook's internet connection (via System Preferences > Sharing) so that that iBook can connect to the internet. The iBook is running OS X 10.4.11. The MacBook is running OS X 10.5.4. I normally have the firewall on the MacBook set to "Allow only essential services." This is good enough for the iBook to connect to the wireless network created by the MacBook.
However, it is not good enough for the iBook to actually do anything on the internet, e.g., browse the web. The only way I've found for the iBook to actually do anything useful on the internet is to set the MacBook's firewall to "Allow all incoming connections."
Is there a better way of doing this? This seems completely absurd on the part of OS X and System Preferences. I do realize that something has to be done about the firewall so that the iBook can effectively connect to the internet, and I'm sure I can use ipfw (on the command line) to munge the firewall rules by hand. I'm wondering why OS X doesn't do this by default, rather than only providing the sledgehammer option of "allow all connections."

All firewalls are port based. Leopard's is no different. Whether a particular firewall deals with "ports" or "services" or "applications" doesn't matter - everything boils down to the port that is in use.
With the iBook by itself it had direct access to the internet. Going via your MB, it needs to breach the MB firewall. What Leopard means by "essential services" in the firewall context is anyones guess (maybe it's documented somewhere and i'm ignorant and lazy for not looking for it though!). I would assume that sharing the internet to other machines is not considered "essential" though.
The test so far is this: firewall on - no internet to iBook. Firewall off - internet works on iBook. You have confirmed it's a firewall issue. You do now need to poke holes in it. You can do this on a service by service basis and open up ports for everything, or leave it as locked down as possible and open up an IP address (assuming you trust everything that will be done from the iBook). And although i'm not 100% sure about the Leopard firewall's working, for just about any firewall worth it's salt you can open up select ports for select IP addresses, but that's beyond what you want to achieve.

Vlan over wireless bridge with internet sharing?

Hi Community, my first post here, hoping somebody may be able to advise...
I live on a farm which is too far for broadband but fortunately I also have an office in a nearby town and because I have line of sight I have setup a wireless bridge, this gives me 8 MBits which is wonderful. Some of my equipment, for example a NAS is on the farm, and I need to access them from the office via the wireless link and I occasinally use vnc to access my office desktop from the farm. This all works beautifully.
Ok. now I want to share my internet with my neighbor on the farm, who, in a strange twist also rents an office next to mine downtown, so I would like to give him access to the internet and to his equipment he has there too.. but I don't want him to be able to access my equipment and visa versa I don't want to see his stuff...
This sounds like a job for port based VLAN.. and so what I bought is two Linksys/Cisco SLM2005 layer2 switches in the hope that this would allow me to do what I want... but I'm not so sure now. In the office I use a draytek v2910 which has a vlan feature that allows me to separate the ports from each other, only giving them internet access.
So... if I connect these two switches to each other, and I create a VLAN with the same id on each of the switches, will the corresponding vlans be shared, so, if you assume the following hardware setup:
farm: slm2005 switch
port 1 -> wireless bridge to office: member of vlan "2", "3"
port 2 -> access point A for neighbor: member of vlan "2"
port 3 -> my own access point B: member of vlan "3"
office: slm2005 switch
port 1 -> wireless bridge to farm: member of vlan "2", "3"
port 2 -> access point C for neighbor: member of vlan "2"
port 3 -> my access point for office D: member of vlan "3"
port 4 -> router port 1: member of vlan "2"
port 5 -> router port 2: member of vlan "3"
the router (draytek v2910) is configured in such a way to separate port 1 and port 2 (otherwise there would be a loop...)
The idea here is to create a vlan "2" for my neighbor and "3" for myself. but what's the correct way to consider the wireless bridge inbeetween (in fact, I think the same problem would occur if I just connected the two switches with a cable (if i had a 2 mile long one..)...)
Will my neighbor be able to see both access points "A" and "C" and the internet, but not be my access points "B" and "D"? Or does this whole concept of VLAN over bridge not work like this, or not at all?
Thanks in advance for any advice,
Andres

Hi Andreas,
you're not far from it.
Your whole concept is ok. What you just need is on the gateway of each subnet (I would presume it's the router in the office) to create an access list preventing to route between vlan 2 and 3.
On all other devices, traffic can't jump between vlans. But on a routing device that has the Vlan layer3 interfaces, traffic is routed between vlans so that's where you need to prevent it.
With regards to vlans over wireless, you're also having the good concept. The point is to have only 1 ssid, that will be in a certain vlan, but also bridging the other vlans onto that ssid.
This doc should help you out :
http://www.cisco.com/en/US/partner/products/hw/wireless/ps4570/products_configuration_example09186a00801d0815.shtml#vlanbr
HTH,
Nicolas
Thanks to rank the answer if you see it as useful !

Split DNS with internet sharing

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