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)

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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

Firewall blocks web sharing

2 computers, laptop with Snow Leopard, large web site in ~/Sites/htdocs, with .shtml files and an SSI file to add text common to all .shtml files. I'd like to see this on the desktop computer as it appears to others , but Firewall blocks web sharing on laptop. How do I fix Firewall?

System Preferences>Sharing. Is File Sharing selected?

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.

Firewall blocking from sharing

how to keep my firewall from blocking my photoshop elements 9 from uploading and sharing throuhg facebook. i have been using it for 3 years and saturday it stopped and said that the firewall is on but i have turned it off and called dell support and they couldnt fix it they said it has to do with adobe

The use of Terminal to delete the firewall plist cleared up the problem. See this thread:
https://discussions.apple.com/message/23683179#23683179

Firewall Blocking Internet Access

Looking for suggestions to solve this problem. Multiple computers in my home will suddenly be unable to access the internet. Turning the firewall off for a few seconds, then back on will eliminate the problem on each computer affected. This problem seems to have shown up after the last security update, but not immediately. When unable to access the internet, if I look at the network system pref, it lists an ip address of 167.xxx.xxx.xxx. After toggling the firewall, I will get my normal 10.0.0.x back.
The issue seems to manifest a couple times per day, and almost certainly if the computer goes to sleep or is restarted. It happens on both my desktop and my laptop running 10.5.8, but not on a g3 imac running 10.4.11.
If I look at the firewall log I see multiple messages about "Firewall[90]: Deny mDNSResponder data in from...." These show up constantly about every 30 seconds or so. I am guessing this may have something to do with the issue as I do not see these messages in the G3 imac's log file.
Network is set up with a time machine with three macs (one g3 imac running 10.4.11, a G4 MDD running 10.5.8 - both wired connections, and a G4 ibook running 10.5.8 (wireless) as well as a couple network printers, dish, slingbox, a linksys switch etc.
Any suggestions would be appreciated as this is getting very annoying. Thanks.

I'm sorry, I said time machine and meant time capsule. The time capsule is set up as the router, and the linksys device is only a network switch. The modem is capable of functioning as a router also, but I just verified it is only functioning as a high speed modem (according to my isp). I have tried restarting and reconfiguring the time capsule, but it has not seemed to affect anything. It seems to me data goes out (ie to printer or network drive or internet), but does not come back.
Also, I have switched locations of the G4's and the G3 and get the same result.... the G3 always works, the G4's only work when their firewalls are toggled off. I have at this point tried reinstalling a 10.5.8 combo on the laptop to no avail. I think I might just do a clean install of OSX from CD and see what happens. Thanks for the reply.

Firewall blocking internet

Sometimes I can't view web pages when the firewall is on, even though I can ping from the computer and everything seems fine with the modem. It happens a few times every week.
When this happens the firewall log has entries like this:
Feb 16 00:01:29 localhost ipfw: 12190 Deny TCP 66.249.93.95 89.240.195.140 in via en0 (frag 51366:40@1376)
The bit at the end in brackets is the unusual part that only appears with this problem. Does anyone have any idea what that could mean? The numbers change, except the @1376 bit which is always the same.
I have been assured this is not a hardware fault by Apple and they even doubt it's to do with the firewall, but the problem disappears when the firewall is off.
Has anyone heard of this before?

Hello and Welcome to Apple Discussions.
Which websites does this occur on? Perhaps we could try to recreate.
You might wish to try Flying Buttress (link) will allows find control of the OS X IPFW without embracing the Terminal.
I wonder if some site is trying to use Port 1376.
mrtotes

Lumia 920 - internet sharing doesn't work: Connect...

Hello all,
I'm experiencing a serious problem with the lumia 920. It seems impossible to share my internet connection. Something I normally use for several hours a day. If this problem can't be fixed soon, ill be forced to swithc back to iphone or htc.
Problem description:
When turning "internet sharing" on:
Connection not shared - There is no cellular data connection to share right now. Check your cellular settings and signal, and try again.
Important remarks
Belgium - cellular provider is Mobistar
I can browse, sync email, etc over the provider's network ans send and receive MMS.
Provider does not block internet sharing. Have always used this.
OS Version 8.0.10211.204
Firmware revision: 1232.5957.1308.0002
Access point :
Nokia Access Point version:3.4.1.7 - db 2.0.0.100 - lib 1.2.0.7
The default access point provided in the Nokia Access Point app does not work: can't even browse.
Using a manually added APN:
Data type (default / LTE) tried both. Everything keeps working - except internet sharing...
APN pro.web.be (for professional subscribers)
MMS APN mms.be
MMSC address: https://mmsc.mobistar.be
What have i tried to remedy the situatiuon?
updated the Nokia Access Point app
changed language to spanisch using OTA update (silly, but read on a forum this might help)
soft reset of the phone (often!)
deleted the manually created access point
Hard reset of my phone
I'm interested, of course, in any tips to solve this serieus bug / issue / problem.
(my best guess is that Nokia tries to help their customers with the Access point app, but fails to do so).
Please, if any of you experience the same problem please respond to this post so we can get an idea about how big of a problem this is.

Hi,
I had the same problem. But I let it go after weeks of corresponding with Mobistar.
Yesterday I went to a Mobistar shop, the guy tried lots of thing I already tried (different apn's, ...).
Then he told me the it's a problem with business clients. They have to use the apn web.pro.be, where internet sharing doesn't work (he doesn't know why).
But, that if I call to Mobistar and ask to activate apn mworld.be on my telephone number, it should work.
Today I called Mobistar Business (you can find the helpdesk number on your invoices), asked to activate mworld.be to have internet sharing access on a windows phone.
Half an hour later, using mworld.be as apn i have internet access, and I can share my internet connection.
regards,
Stijn

Firewall blocks DHCP after Logic Board Change

I had my computer in repair and they changed the logic board. Since then "Set access to specific services" setting misbehaves and blocks DHCP configuration.
After the repair it asked me to allow incoming connections for configd. I denied because I did not know it.
Problem: configd is not listed in Preferences so it cannot be unblocked!!!
How can I completely reset the rules table and start over?
Firewall[41]: Deny configd data in from 10.37.129.1:67 uid = 0 proto=17
Firewall[41]: Deny mDNSResponder data in from 169.254.203.40:5353 uid = 0 proto=17

I give up. This is a horrible issue. Now, the Firewall blocks internet access to configd and mDNSResponder after wakeup from suspend despite being on the "Allow all incoming" list of the System Preferences panel.
The firewall has become useless.
Jul 17 14:22:13 garfield2 Firewall[42]: Deny configd data in from 10.37.129.1:67 uid = 0 proto=17
Jul 17 14:22:15 garfield2 Firewall[42]: Deny configd data in from 10.211.55.1:67 uid = 0 proto=17
Jul 17 14:22:22 garfield2 Firewall[42]: Deny configd data in from 10.37.129.1:67 uid = 0 proto=17
Jul 17 14:22:24 garfield2 Firewall[42]: Deny configd data in from 10.211.55.1:67 uid = 0 proto=17
Jul 17 14:22:30 garfield2 Firewall[42]: Deny configd data in from 10.37.129.1:67 uid = 0 proto=17
Jul 20 09:18:58 garfield2 Firewall[42]: Deny mDNSResponder data in from fe80::21b:63ff:fe9b:37d4:5353 uid = 0 proto=17
Jul 20 09:18:58 garfield2 Firewall[42]: Deny mDNSResponder data in from fe80::21c:42ff:fe00:0:5353 uid = 0 proto=17
Jul 20 09:18:58 garfield2 Firewall[42]: Deny mDNSResponder data in from fe80::21c:42ff:fe00:1:5353 uid = 0 proto=17
Jul 20 09:18:58 garfield2 Firewall[42]: Deny mDNSResponder data in from fe80::21b:63ff:fe9b:37d4:5353 uid = 0 proto=17

Firewall blocks some services when sharing internet connection

Hello,
I have some issues regarding internet sharing that I hope someone could successfully troubleshoot :
2 computer, iMac G5 2.0 and an original "17 PowerBook G4 1.0, both running 10.4.7.
The iMac is connected to the internet via Ethernet and shares its connection with the PB using the Airport.
The problem is that when the Firewall is enabled (just using the built-in one) the shared connection is limited for only few services :
Web browsing, iPhoto and iTunes Bonjour sharing, Apple Remote Desktop all work smoothly while iChat, MSN Messenger, Bittorrent clients can't connect and Mail can't go Online (can't connect to my Gmail accounts). Since even enabling all default services in the list doesn't help the only solution is to completely disable the Firewall in the iMac. When the Firewall is off everything goes back to normal.
I tried to isolate the problem but I can't get my finger on the right ports to open.
I tested sharing the connection through Firewall instead but it's the same so It's definitely not related to the type of connection used to connect the two computers one to the other. It is strictly related to the Firewall.
I found two Apple documents :
http://docs.info.apple.com/article.html?artnum=107653
http://docs.info.apple.com/article.html?artnum=107594
I carefully followed the instructions but it didn't resolve the problem.
From reading the first document I learnt that port 443 is related to the Secure Sockets Layer service so I searched Apple document http://docs.info.apple.com/article.html?artnum=106439 for other ports related to that service but since I'm not an expert I couldn't figured it out right by myself.
Setting for the iMac side are as followed :
Network panel : Airport is active. (as recommended in http://docs.info.apple.com/article.html?artnum=107594 I set Airport to the highest port priority).
Sharing panel/Services : Personal web sharing is set to ON. As I mentioned before even enabling all default services in the list doesn't help.
Sharing panel/Internet : Internet sharing is ON. "Share your connection from" is set to Airport. "To computers using" : Airport checkbox checked. I tried the Firewall option instead as well.
Appleshare is ON and automatically configured (zero configuration in the Firewall) on both macs.
Ports for iChat, MSN and Gmail on the iMac side are open. iMac has no problem to connect to these services directly.
On the PB side turning the Firewall on or off resulted the same.
Could someone please help me to configure the Firewall so it won't have to be always turned off?
Your help is much appreciated
Elad
Original PowerBook "17/iMac G5 2.0 "20 Mac OS X (10.4.7)

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)

Internet Sharing Blocking MSN

I have a mac mini on my desk which is connected to internet with an ethernet cable, and I also have iBook G4. I use the airport on the mac mini and set up internet sharing to get online with the iBook. I can surf on websites, such as I am writing this on my laptop, but I cannot access for instance MSN, and some other services from here, but I can get to them on the mac mini. Is internet sharing blocking access to other ports or what's going on?
iBook G4 Mac OS X (10.4.2)

Yes, I managed to connect if I turn of the firewall. There are no messages in console.log. Obviously the firewall is blocking everything but http traffic through the mac mini.
Mac OS X (10.4.2)

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.

"Firewall" and "Internet" buttons missing from "Sharing" preferences page

Hi,
I recently upgraded two servers to 10.4.3 (one was running 10.2 and one was running 10.3). On both servers now the Firewall and Internet tabs are missing from the Sharing preferences. Also, under the list of services on the Sharing prefs, there are only three services listed:
REmote Login, ARD, and Remote Apple Events. No other services are listed.
I found this problem because something in the firewalls changed and was blocking access to the servers via ARD. If I stop the firewall, then ARD works. So I wanted to go into the firewall settings and open up the ports required by ARD. Lo and behold, no Firewall tab on the Sharing page!
I've searched everywhere for info on what could make most of the services disappear, along with the Firewall and Internet tabs. But I can't find anything. Any ideas out there?

A call to Apple confirmed that the majority of services on 10.4 Server are now handled through Server Admin rather than through the Sharing preferences window.

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.

Firewall blocks internet sharing

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