Ad-hoc internet sharing firewall

I have an ad-hoc wireless network set up with internet sharing on a Mac mini running OSX 10.6. I have several machines connected to it, all of which can ping the mini and can access the internet in general. I can also ping each of these machines from the mini. However, none of these machines seem to be able to see each other - I can't ping them across the mini's ad-hoc network, and when I ping the broadcast IP (10.0.2.255 in this case), I only get a response from the mini. What secret configuration options do I need to alter to get the machines on the network to see each other? I'm a Linux guy, btw, so if the answer involves messing with things at the command line, I'm cool with that.

To elaborate a bit, a more Mac kinda guy than I am confirmed that internet sharing makes the mini act as a gateway, but not a router, which is obviously what I need. Is there a convenient way to get it to act as a router, or do I need to spend some quality time with ipfw?

Similar Messages

Ad Hoc Internet Sharing

I have a windows PC at home and a Powerbook. I want the PC to be directly connected for serving purposes, but would like to be able to have both comptuers on the internet, without using a router. I got a wireless USB key for the PC, and now have it set up Ad Hoc with Internet Connection Sharing active,
The powerbook can see the network in the airport menu, but neither the file sharing, or internet sharing options are working.
possible solutions anyone? thank you

No need to triple post.
http://discussions.apple.com/message.jspa?messageID=1961620#1961620

AD HOC Internet Sharing Issues

I was delighted when i found out that my MBP could put out a wireless signal for the touch to use as im not in the location for one in my university halls. However although i can access some websites, the majority being search engines, google, yahoo, wikipedia, etc. i cannot go further than that, for example i can go to google, search IPod, look at the results, but not access any of them. The youtube application never loads videos even though sometimes it will find search results. Also i cant get on to the apple website, one of the default bookmarks. Is this due to the integrity of an ad hoc network? Or is there something odd?
I ask this mainly on the basis that it loads the search engines up in a matter of seconds, but then completely times out on the next step of accessing results.
Help for a noob would be much appreciated.
Tim

To elaborate a bit, a more Mac kinda guy than I am confirmed that internet sharing makes the mini act as a gateway, but not a router, which is obviously what I need. Is there a convenient way to get it to act as a router, or do I need to spend some quality time with ipfw?

Ad hoc internet sharing works fine but iPhone won't show up in itunes

Hi all,
I have set up an Ad hoc wifi network on my laptop and am able to connect to it from my iphone 3GS and share its (laptop) internet connection.
I have checked "Sync with this iPhone over wireless networks" in itunes.
However as soon as I unplug the USB cable my iphone disappears from itunes and "Sync Now" on iphone becomes greyed.
I can connect to Internet from iphone using the ad hoc network so I know they two devices are communicating wirelessly.
I just don't understand why I can't see the iphone in itunes.
I am running itunes 10.6.1.7 and IOS 5.1
Any help will be highly appreciated

Try another usb port or this:
http://support.apple.com/kb/HT1224

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

Help with Firewall and Internet Sharing

I’m trying to use my Mac Mini with an Airport Extreme card, which is connected to the internet using Siemens Speedstream 4100 DSL modem, for Internet Sharing with a Windows (work) laptop.
So, in the Sharing preferences panel:
Share connection from: Built in Ethernet
To computers using: Airport
I get the warning message:
Other settings may interfere with Internet Sharing.
The ‘More Info’ button gives the popup message:
Your firewall settings will prevent computers sharing your internet connection from browsing the web. Enable Personal Web Sharing in the Services pane to allow computers sharing your connection to browse the web.
I do that, turn the Airport card on, and the laptop can see the network, but can’t connect.
If I turn the Firewall off, then I can connect fine, but then I don’t have a Firewall. Isn’t that risky if I’m using DSL? How can I do the internet sharing and still protect my computer?
I realize I could buy a router with a built-in firewall, but isn’t there a way to set up the system using what I have?

BDAqua wrote:
We just need to figure out what port is needed. I'd goto Sharing>Firewall>New>Port Name... Other, and try Port 53 both UDP and TCP.
Oh, and when you say the PC can't connect, could that just mean it can't browse?
On the PC, put the IP of the Mac in DNS servers, or...
208.67.222.222
208.67.220.22
Well, I'm unable to set the DNS server addresses, as this is a work computer and I don't have the administrative privileges.
How bad is it to just turn the Firewall on the Mac off when I want to use the connection?

Firewall and Internet Sharing dont mix

After talking to AppleCare, looks like my firewall is not letting me sync to my AppleTV because I am using Internet Sharing to connect it to my Mac Mini (PPC) and get to the internet through the Mini's ethernet. I have no Airport Express or Extreme.
He says that enabling "iTunes Music Sharing" only opens that port for ONE of the network connections (ethernet or airport), but not both. Hence AppleTV wont sync with the firewall on. Only with it turned completely off.
Anyone out there know different? Or know of a workaround to open the port for both networks somehow? (sorry if I don't speak the wireless-magic lingo well)
This is my first wireless device- so I'm a noob. Sorry.

I have had a ton of trouble syncing.
Can you see Apple TV in your preferences?
Does Apple TV start syncing and then drop off?
If so, open iTunes and quickly click on Apple TV and you will see the sync start. Then quickly Click on iTunes/Preferences and then on the Apple TV tab. Leave that small window open and then the sync will keep going.
Weird butmay help.

How can I use Internet Sharing with Firewall on ?

Hi,
My PowerMac G5 is connected to the internet via Ethernet. I share the connection to a Powerboog via Airport using internet sharing. Everything is working fine except when I turn the Firewall on. After reading http://docs.info.apple.com/article.html?artnum=107653 I tried opening port 443 but it still does'nt work. I'd like to be able to use internet sharing with the firewall on. Anyone can help me ? Thanks!

Hmmm, how curious... I never had to do that in 10.4.7 or 10.4.8... the only ones I ever tried Internet Sharing with.
I'm wondering if turning the Firewall on after the Internet sharing is what's doing it? Just for kicks you might try turning off Internet Sharing, then Firewall on, then turn on Internet Sharing.
If that doesn't work, then I'd personally try trashing...
/Library/Preferences/com.apple.sharing.firewall.plist
Then reboot and try the Firewall again.

Internet Sharing and Firewall

I am having a difficult time using internet sharing to download files and access email using Mail. I can go online with my browser, but other services like Mail and downloading files doesn't seem to work.
I feel like this is a firewall issue. Can someone tell me how to configure my firewall settings to work better with Internet Sharing?
I am using a G5 Mac to Internet Share to my MacBook via Airport.
Thanks for your help.

If you need help opening the right port in the Shaing
Pref Pane... give a hollar.:-)
Maybe you can help me? I tried to set up new openings in the Firewall pane, but it didn't seem to do anything. Am I in the wrong place? I did this on the mini that is doing the sharing. I selected "new..." and typed 110, 25 in the TCP field.
(I first noticed the "browser ok / mail not ok" issue when using Parallels, and then saw the same with Mail in OS X. Connecting directly to an Airport Express works fine, so it looks like it's the sharing.)
mini dual core, MacBook C2D Mac OS X (10.4)

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.

Firewall blocks internet sharing

Hi all,
I know this has been covered before but I've never seen a solution that works for me. Maybe someone has time to talk me through it.
All I need to do is configure the OS X firewall so that internet sharing via ethernet isn't blocked by the firewall. Can I do this via the terminal? Which ports do I need to open? I need this to work so I can distribute builds across Xcode installations but I think internet sharing is all that is required for it to work.
Thanks,
Stephen

In the Sharing pane of System Preferences, click the Advanced button under the Firewall tab, enable firewall logging, and then try using those services on the other computer. When done, check the firewall log and look for the number after the : in the logged entries; this is a port number. Knowing the IP address of the other machine will help determine which entries were produced by it as opposed to ones which came from the Internet; this is visible in the Network pane of System Preferences.
(15371)

Firewall, Internet Sharing, and Leopard

Hi guys,
Here is my scenario: I use my Macbook to connect to a public wifi network in my apartment complex. I use my Macbook for internet sharing (wifi to ethernet) and have a Win!@#s machine which I use for gaming hooked up to the ethernet port. In Tiger, I was allowed to let the game (World of Warcraft) through the firewall by adding the tcp ports it used. But in Leopard I am not given the option to enable certain ports, only applications. The problem is, the application actually runs on the Windows machine, so I can't just select it.
I've been reading a bit and it appears Apple did away with the port filter method and has adopted this new application only method. I find it frustrating and the developers should have known better than to disable this feature. It has severely limited the security in the operating system and has cast away power users like myself.
Is there anyway to work around this issue? Either with 3rd party software or some other way?
Message was edited by: Frank Cabrera

I agree, Apple really blew it by trying to re-invent the firewall.
Not having the ability to open or block traffic by port and IP address was a terrible idea.
Limiting it to Applications only makes the firewall almost useless.
I would like this idea if I was also allowed to choose for myself.
This is a technological step backwards!
Many many people feel the same way and some are now relying on the still built in ipfw which is a commonly used and quite robust firewall. Unfortunately it is very difficult to configure unless you really know what you are doing. I am sure this was one of the primary reasons why Apple made this decision.
Search around this forum for ipfw and you will find a bunch of info. Just beware it is not exactly user friendly even with some nice GUI apps that help you configure it.
Send feedback to Apple about this or it will never get fixed.

HINT: Turn off Firewall to enable Internet Sharing

it only took 2 hours of trial and error, but I am finally able to access the internet from my iPhone via my father's iMac (Intel Core 2 Duo, purchased in May 2009).
turn OFF the Firewall!
setup:
iPhone 3.1.2
iMac 10.6.2
Internet Sharing On: From ethernet, To Airport
cheers.
(keywords: iPhone, Internet Sharing, Snow Leopard, Airport, Firewall)

mmm... I had actually edited my original post but it didn't stick.
rather than turn off the Firewall (not ideal as the man from Virginia has rightfully pointed out), turn off the "Block all incoming connections" option in Advanced options.
cheers.

Internet sharing wifi 802.11b/g

Hi. I don't know if this is possible or maybe I'm looking at it at the wrong way. I am trying to share internet from my MBP via Wifi. But the other non mac laptops can't connect to it. They can see the wifi connection, but they can't connect to it.
I'm thinking that my MBP is broadcasting in 802.11n while the other laptops only have 802.11b/g. If this is the case, can i make my MBP broadcast in 802.11b/g?
If this isn't the case, what can I do to give them internet?
My ipod touch does get internet from this broadcast though.
Thanks in advance.
Droopox 

You can definitely share wireless from your laptop by setting up what's known as an 'ad hoc network'. Usually this means that the IPs issued are in the 169.254.x.y range, which is otherwise better known as APIPA and when not being used as an ad hoc network range indicates that there's a problem with the DHCP server.
You can also turn on DHCP yourself and set up a valid private range, usually in the 192.168.x.y range.
Your laptop will work with 802.11n, g, b, and a systems.
You will need to turn on Internet Sharing, select the relevant ports, and turn off the relevant firewall entries. Other devices will need to pick up the signal (which will not be strong) and will need to use the correct network.

UTorrent, Internet Sharing and Port Forwarding: Horrid Trifecta

Every good question has a couple of miles of back story, so here it comes:
I bought a Windows PC recently, and one of the first programs I downloaded was uTorrent. I have an iBook G4 running 10.4.8, but I have no wireless router, so I thought I would use internet sharing to get my new laptop off the ground. Everything connects great, internet sharing is wonderful on the web, but then I use uTorrent and notice that I'm uploading at nearly 3 times the speed I'm downloading, even when I only have 12kb of a file. I then notice the small icon at the bottom of the application that looks like a warning flag that my computer is confused, and I figure out that the problem is my new laptop has no ears, or rather, no listening port through which uTorrent can increase the speed of my DOWNloads. Further searching reveals that the traffic on the appropriate port is not getting through, hence I try to figure out how to manipulate internet sharing into forwarding the appropriate port range. I found Brickhouse, or as it is now known, Flying Buttress, but the program is remarkably confusing (to be perfectly honest, I'm not that bright). I cannot get FB to forward the port, no matter how hard I tried (every time I clicked Start IP Sharing, the it wouldn't work). So I can't use FB. I thought I would be clever and create a network on my Windows PC and share it with my iBook, but apparently my iBook refuses to share the Windows internet.
So now I am stuck trying to figure out how to get this Windows PC to receive traffic on TCP/UDP ports 10000-65535 through my Mac. To be honest, I really thought that the Mac would easily be able to forward the ports (is this in store for Leopard?), and I was a little disappointed the whole thing was so frustrating, but then I tried to setup an ad-hoc network on the Windows PC and realized that my Mac is still FAR easier to use, despite is insufficiencies.
So, long story short, I need help forwarding ports through internet sharing. If you can help me use FB, that's great, but to be honest, I would like a cleaner solution if possible. So my question is: How do I get my Mac to share port traffic with Windows if it is running internet sharing?
iBook G4 Mac OS X (10.4.8) Other Computer: Windows XP, other specs available on request

I was hoping more for a permanent solution that doesn't cost $100. Did I mention I'm in China? That program seems great and all, but I have the same technical difficulties I've had with FB. I can get the thing running and still have an internet connection on my machine, however, the port mapping or port forwarding or whatever you wish to call it doesn't actually work. These programs make it very difficult to understand what's going on; I checked the IP Address on my windows machine and used it as the actual address for the port I wanted to forward, I applied the settings and absolutely nothing changed on the windows machine. I went to portforward.com to check if the port was forwarded properly and still no response. This will sound stupid, but when I hook up the windows machine to the router through ethernet, it works perfectly, no forwarding required, so it is essentially my mac that is blocking or absorbing the intended traffic, but if I hook up the windows machine to the router, I have no internet for my Mac (I'm not sure if that's a problem with my Mac or with ICS). Can you explain to me how to use this program to forward ONE port, and ONLY forward one port (or a range of ports would be even better) without all of its inane firewalling that blocks all the internet traffic? Or am I just hopeless on this issue?

Ad-hoc internet sharing firewall

Similar Messages

Maybe you are looking for