Screen Sharing won't work.

Sorry I pirated someone elses thread so I will start my own this time.
I still can't get this to work, there are no DOS or other attack blocks that i have been able to find, we have tried every combination of settings that we can think of,
IChat will connect, when we are both on line but not in a conference, display the "starting Screen Sharing" banner across the screen, audio starts but after a couple of seconds it disconnects.____________
Defcom and I tried to get screen sharing working with no success, when we were connected to each other in a video chat, it failed with the usual notification, but announced itself as a "Audio Chat"
when we were both Online but not in a conference, the banner came across the screen, the audio was working, but the connection died almost immediately,
have been trying to get this to work for a month now with no success, any Ideas?
Message was edited by: demadmonkey

Firewall - Custom Filter Configuration
Inbound IP Filter Rules
Rule
No. Status Access Protocol Source
Interface Source
Address Source
Mask Source
Port Op Destination
Interface Destination
Address Destination
Mask Destination
Port Op Log Enable
Disable Delete
122 P,E permit GRE any any any N/A any any any N/A No Protected Protected
124 P,E permit 50 any any any N/A any any any N/A No Protected Protected
2000 P,E deny TCP any any any any any 127. 0. 0. 1 host = 53 No Protected Protected
2002 P,E,S permit UDP any any any any any 127. 0. 0. 1 host = 53 No Protected Protected
2004 P,E deny UDP any any any any any 127. 0. 0. 1 host = 53 No Protected Protected
2202 P,E,N permit UDP any any any any any 127. 0. 0. 1 host = 68 No Protected Protected
2206 P,E,N permit TCP any any any any any 127. 0. 0. 1 host = 7547 No Protected Protected
2228 P,E,N permit UDP any any any any any 192.168. 1. 64 host = 12526 No Protected Protected
2230 P,E,N permit TCP any any any any any 192.168. 1. 64 host = 12526 No Protected Protected
2238 P,E,N permit UDP any any any any any 192.168. 1. 64 host = 16402 No Protected Protected
2240 P,E,N permit UDP any any any any any 192.168. 1. 64 host = 32141 No Protected Protected
2242 P,E,N permit TCP any any any any any 192.168. 1. 64 host = 32141 No Protected Protected
2244 P,E,N permit TCP any any any any any 192.168. 1. 64 host = 4 No Protected Protected
Outbound IP Filter Rules
Rule
No. Status Access Protocol Source
Interface Source
Address Source
Mask Source
Port Op Destination
Interface Destination
Address Destination
Mask Destination
Port Op Log Enable
Disable Delete
120 P,E permit any any any any N/A any any any N/A No Protected Protected

Similar Messages

Ichat Screen Sharing Won't Work

Can't seem to find any posts that are helpful with the problem. Was using Screen Sharing with my Inlaws the other night to help them, but now it won't let them share their screen with me. I can share my screen with them but not the otherway around. Has anyone run into this same problem and successfully resolved it?

James Mol wrote:
I spent time to day working on it. I had a G4 computer at work, migrated to a used Mac Pro with snow leopard and I could not get audio, chat or screen sharing to work to my home computer which I just upgraded to snow leopard. Text worked fine.
This tells me that the computer changed and also the OS. It does not tell me what the G4 was running before hand.
As there were changes in the Firewall from Tiger (10.4.x) to Leopard (10.5.x) and also to a somewhat lesser extent from Leopard to Snow (10.6.x) I would tend to look to the Firewall on the Mac.
Check that in the Advanced Button Stealth is not Enabled and that Signed Apps are Allowed. (10.6.x wording)
I check the forums and tried different things and have it so I can connect from home to the old office computer and from the old computer home.
Umm, from a unknown computer to the aforementioned G4 with no insight to OS or iChat versions or settings.
The new one still has a problem or two but I am getting closer.
If getting closer is Audio Only or Video Chats then you are making progress.
I have not changed any ports since upgrading and found a couple of simple things unchecked or checked that have cause my problems.
It would be helpful to know what you changed and where.
For instance if you set up the Firewall in Snow Leopard (Allow Signed Apps) or in Leopard (Allow Specific Apps or Allow All).
Talking of Ports.
If the Router at work was or is using Port Forwarding to open the ports then if the IP of the G4 has not changed it may be the only machine there that Can Video or Audio chat (Port Forwarding often requires you point the ports to be opened to One IP/Computer)
As the Screen Sharing uses a Random port the Port Forwarding can not be set up for this.
8:57 PM Saturday; November 13, 2010
Please, if posting Logs, do not post any Log info after the line "Binary Images for iChat"

Screen Sharing won't work, but every other VNC client will

I have been trying to resolve this for months, and nothing has worked so far. I can connect to my Mac Mini Server (Snow Leopard Server) from LogMeIn, from Chicken of the VNC, from JollyFastVNC, and from VNC clients on my iPad and iPhone. However, I cannot connect using OSX's own Screen Sharing service. I'm really frustrated, and I've posted here before without any sort of help. Is there ANYONE that can solve this problem for me?

To restate your issues and your question and your concern, you're frustrated, you're using a WiFi connection, you're not attempting remote access, it's not working for some protocols, and you're receiving unspecified error message(s).
Start by posting the diagnostics and messages received when this "doesn't work".
Then reconfigure the network, and (for testing) specifically move the screen sharing client box onto (and add one if needed) the same network switch as the server. Remove the WiFi device (a router) from the network connection. (Unmanaged gigabit network switches are cheap, too.)
In addition to and in parallel with reconfiguring the network (for testing), also confirm that all of the network port connections on the WiFi are established on the correct physical ports, if you're using that device as a network gateway and NAT device in addition to using it as a router.
Also ensure the firmware on the WiFi device is current.
Drop the firewall on the client.
Given you're probably on a NAT-based network and (guessing) using the WiFi device is configured as a gateway, post up some DNS or mDNS information, and a forward and reverse dig of the IP address. (I haven't seen issues such as this with local screen sharing via the Apple tools, but other Apple tools are known to be sensitive to incorrect DNS configurations.) From the same client you're attempting the screen-sharing:
dig -x your.target.ip.address.

Screen Sharing won't work (keeps contacting)

Hi,
I have a problem with the new VNC screen sharing feature in Leopard.
My setup consists of a +Macbook Pro running 10.5 and a Mac Mini G4 running 10.4.10+
Previously i would use the app "+Chicken of the VNC+" to take controle of my Mac Mini over the home network. The Mini does appear in the finder sidebar and i'm able to login and access all the files and apps.
But when I click "Share Screen" The Screen Sharing app opens and i get a progress bar that says "*contacting ...etc*" and it just stays there. I have left it contacting for about an hour now.
I have no idea would this could be (probably something simple..)
Hope anyone has a solution for this and I gave enough info/made my problem clear enough.
Thx in advance

Same problem here.
After many restarts, and with the firewall off on both machines, my MacPro is unable to share my Mac Book's screen. Both are running Leopard.
The laptop has no problem sharing the desktop's screen, but just sits there on the "Connecting..." progress dialog when attempting to view the laptop's screen from the desktop.
Note that without changing a single setting, ChickenOfTheVNC connects right away.
-Steve

Screen Sharing no longer working

Hello, everyone. I have developed an issue with screen sharing on my MacBook Pro running OX 10.6.8, and I cannot seem to resolve it. Perhaps I am missing something. I realize this is a long post, but I am trying to be as complete as possible with my description of the problem and the steps I have taken to try to resolve it.
Screen sharing is of particular importance to me because I use it to control a Mac Mini that has my entire iTunes library. The Mac Mini is running OS 10.6.8.
Ordinarily, I would open Finder, click on the Mac Mini under "Devices," then "Share Screen" in the upper right corner of the Finder window. I enter my name and password in the login box, and I am controlling my Mac Mini within seconds.
Within the last few days, however, I have been unable to complete the connection. The first sign that something was wrong was when it took almost five minutes just for the login window to appear. Then, after I entered my login information, the "Connecting..." gear began spinning. It never gets any farther than that. I have even tried waiting as long as 45 minutes for the connection to complete before giving up, which requires restarting my computer, since force-quitting Screen Sharing doesn't work.
First, I tried re-booting my Mac Mini a few times, with no success. I also tried re-booting my MacBook Pro both in normal and safe mode, followed by repairing permissions and checking the volume structure (Disk Utility found no errors). I even tried running the full suite of Onyx scripts.
To isolate the issue, I took two other computers in my house, one running OS 10.7.4 and the other running OS 10.8, and they connected perfectly. All computers are on the same wireless network (although the Mac Mini connects to the same network through ethernet). Therefore, the issue has to be with my MacBook Pro.
Does anyone have any ideas as to how to resolve this issue? Thanks in advance for any assistance you can provide.

I too was running a Mac Mini with Server 10.6.8. Using it as a Netboot server was working just fine, but I wanted to look up the version of something on the mini. Connecting over screen sharing hung all day yesterday, so today I hooked up a keyboard, mouse, and display to look up the information from the mini. Turning off and restarting the shared services, restarting the mini, deleting keychains, attempting to get a screen share from a Finder connection... all hung at the "Connecting..." dialogue. I found this thread and signed out of MobileMe on the mini, and on the iMac I was using to connect. The connection went through at last, and now it's re-establishing without a hitch.

IChat 4.0.7 Screen Sharing does not work.

Me and my friend both have identical machines, the intel iMac 20" 2.66mhz
Software is identical
iChat version is identical (4.0.7 (616))
Video Chat works perfectly, our internet connections are fantastic, no issues there.
Both using Netgear routers with uPnP enabled.
Internet Sharing is OFF
Firewall is "set access for specific services and applications" and iChat and iChat Agent are added.
I conclude that Screen Sharing *does NOT work* as advertised.
Apple, I am most disappointed, get it sorted for next release please.
Who else has witnessed this epic failure?
Thanks,
edit
Also, what is this iChat AV nonsense? Where are the iChat 4 forums?
Message was edited by: Wayne

Thanks again Leo for your help,
Yes I was refering to the screen sharing in system preferences/sharing.
Checked the video menu:
Screen sharing enabled
Camera enabled
microphone enabled
so no that's not it! Was hoping it was something simple like that too.
Both netgear routers dont have any ports forwarded, just upnp enabled.
The frustrating thing is, both macs are new, one is only days old, and neither mac has had it's setting messed about with or anything.
It would be great to find the solution, 100's of people having similar issues if you google it.
*edit*
Just a thought, would the type of account make a difference? At the moment we are both using the type of accounts that iChat creates when you select "get an iChat account" (creates a [email protected] login)
Message was edited by: Wayno

Lync screen sharing doesn't work in Windows 10 Technical Preview (9879 Build)

Why Lync screen sharing doesn't work in Windows 10 Technical Preview?
It works well Windows 8.1, but why not in Windows 10?

Hi PriTeddy,
Thanks for your feedback.
As Paul Adare said, Microsoft has noticed such issue, they are listed in following blog:
http://blogs.windows.com/bloggingwindows/2014/11/12/new-build-available-to-the-windows-insider-program/
Some known problems:
As with the last build, you’re getting hot-off-the-presses code which means there are a few issues. We’ll be publishing WU updates shortly to fix the first two, but the remainder will not be fixed for 9879.
•In some cases you may get a black screen when trying to log-in or unlock. The only option is to hold the power button to hard reboot.
•You will be unable to connect to Distributed File System network locations.
•Some systems may see disk growth of 20GB+ due to driver install duplication. On systems with low disk space this can block setup and cause a rollback to the previous build.
•Skype calls will disconnect and Music will stop playing if those apps are minimized.
•There are several known issues with screen sharing with Lync.
Let’s wait for next builds.
Alex Zhao
TechNet Community Support

OS X Screen Sharing doesn't work after Mavericks Upgrade

I have upgraded my 3x machines to Mavericks and Screen Sharing no longer works. I have tried this with and without firewalls on. File Sharing works but Screen Sharing will say connecting for a LONG time and then say that it's not enabled and to go turn it on...
help?
- MacMini - late 2009
- MacMini - mid 2011
- MBA - mid 2012
I have seen a couple people talk about this as well, but wasn't the same thing..

I believe this is the easiest way to resolve any screensharing issues in MacOSX: Solution: Reset the computer list in Screen Sharing. To acomplish that install OnyX. By the way a great tool for your Mac maintenance.
Go to Cleaning>Misc. and
check My Computers list in Screen Sharing.
Press Execute and wait until it finish.
Restart your computer.
I hope this helps.

Screen shot won't work on iPhone 5s

Screen shot won't work on iPhone 5s; is there a fix?

What happens when you try? Have you tried tapping and holding the On/Off button first then quickly tap the Home button?

Screen sharing doesn't work on headless mini

I have a headless Mac Mini that has been running 10.5 and 10.6 for years and I've never had any problems with screen sharing.
I now update to Lion and as soon as there's no screen attached I can no longer use Screen Sharing!
There is absolutely no way I can have a screen perminently attached to the machine.
Any ideas of how to fix this behaviour?
I've tried rebooting with no screen attached and that just hung the server at boot time.

I've found a work around.
Connect the screen and then connect to the machine via Screen Sharing
Then change Screen Sharing from Hardware display to Virtual display.
Then you can disconnect the screen and Screen Sharing continues to work. (At least so far)

Screen Sharing Doesn't Work

Hi!
I am having problems getting screen sharing to work. When starting a session I get an error message saying iChat is unable to start screen sharing.
Using the same computer with the same settings I can connect to some systems, but most systems won't allow me to connect.
In all cases, Enable Screen Sharing is checked. All systems are running iChat 4.x. All systems are running the same operating system. All systems are connected via hard-wire Ethernet.
What do I need to do to get iChat screen sharing to work? Connection Doctor does not show any results until AFTER a session has started.
We are able to connect via messaging with no problems.
Thanks,
Larry

Hi,
Welcome to the  Discussions
The Connection Doctor gives a shortened form of the Error message.
The Pop up (Send to Apple) has a Reveal Triangle next to the word Details.
In here will be a Longer Log with the Error code number at the end of the first main paragraph.
The Main issue with Screen Sharing is that it uses a Random port.
iChat uses 20 ports at iChat 4 and 5
Port 5190
On TCP (to Login to AIM) and to Plain IMs and ON UDP to send Direct IMs including File Sending and Pics in Chats.
Some modems and routers cannot handle this dual use and we suggest changing the Login port to 443 (it helps with some Logging in issues and some Video chats)
Ports 5220, 5222, 5223 on TCP for Jabber and GoogleTalk Buddy Lists.
Ports 5297, 5298, 5353 on UDP and 5298 on TCP for Bonjour Buddy Lists.
Ports 5678 On UDP for Sending/Receiving the Visible Invite to A/V chats
Ports 16393-16402 On UDP (Ten Ports)
(iChat 2 and 3 uses a wider range of ports (2) that can be read here which is where the Jabber and Bonjour ports are listed)
See this Article for iChat 4 up which only lists the changes to the A/V ports
You will notice that the later Article does not mention Screen Sharing.
This tends to mean you cannot "Set" the port in Port Forwarding due to it's random nature.
This may mean your Buddies do not have the port "open" for it.
Using UPnP which gives control to the App about which ports (and when) are opened.
There is also and Issue in Leopard with iChat 4.x with Internet Sharing (System Preferences > Sharing).
This can not be On. It effects all chats that involve A/V, which includes the Audio Chat with Screen Sharing.
9:31 PM Monday; October 26, 2009
Please, if posting Logs, do not post any Log info after the line "Binary Images for iChat"

Back to my mac screen sharing no longer works since Mountain Lion release, even on Lion

I've used screen sharing via iCloud and back to my mac between a 2007 macbook and a 2010 imac. Both computers are still on Lion but screen sharing stopped working when Mountain Lion was released. I've read a number of comments on this forum that people were having trouble since upgrading to Mountain Lion, but I don't think that's the problem b/c I haven't upgraded either machine. I think the problem is something Apple did in preparation for the Mountain Lion release date and it seems to have damaged screen sharing functionality. Anybody else experiencing this or have a fix for it.
As for the specifics, I can still see my "other" machine under shared and can click "share screen," it usually searches for a couple minutes, then pops up the password dialogue box, but then searches for a while and eventually the password box closes, "screen sharing" stays open, but there are no windows associated with it.

I have the same problem, just today (although I'm still running 10.6.8). Every morning I turn on my main Logic mac then fire up my 2 slave macs, connect to them, activate Screen Sharing, and get going.
This morning I tried it, connected to the other macs as usual (I can see/access/alter their hard drives from my main mac) but when I click "Share Screen" I just get the "connecting" dialog box & it just keeps going.
The weird thing is, when I put my laptop into the network via wifi, I can screenshare my main mac's screen (all 3 of them, actually!) but not my 2 slave macs that are ethernet'd to the main mac.
I've tried every solution I could find via google, and nothing is working.
Kirby

Screen Sharing no longer works for me with Lion

I use screen sharing all the time, I have several Macs. Ever since I loaded Lion (on all systems) it opens screen sharing, asks for my username and password and loads the screen; I see the screen(s) for about a second then it prompts me again with my login to gain access. It repeats this over and over with my login.
Anybody know what can be done to correct this issue?

This is an issue I have encountered too. Mac to Mac on Lion its sporadic at best - even when you do get in, you will get a strange jerky beachball on the host computer whilst everything appears to be working fine.
Windows to Lion its seriously borked, and you can't even click on an account to log in. Its something to do with ZRLE encoding of the session, and the fact its the first multi session VNC attempt. It rejects the connection unless its 101% happy with it.
Mountain Lion makes this a bit easier...I think they glossed over this in Lion and released a new one instead.
So whilst its not a solution, more of a workaround - your best bet is to upgrade to ML. By all means try making a freshh account on the host computer that matches the client compuer, and see if that authenticates properly. It should do.
Cheaper option: turn screen sharing off, use Vine as your VNC server instead (http://www.testplant.com/products/vine/). You can even do multi session if you want to tinker with some settings and read the forums.
Please mark as solved if this helped you. Thanks!

Screen sharing no longer works.

I cannot use screen sharing between my laptop and mini, although I used to be able to do so, after I "updated" to Lion. However, I can use file sharing, showing that wireless (airport) connection is working. This seems to be an Apple network problem. I tried the solutions posted (signing out of MobileMe, restarting my laptop), but Screen Sharing comes up, the "Connecting" window shows and then goes away, while the network/(my laptop name) window stays on. Laptop also shows up in the sidebar. Trying for Screen Sharing help gets me a message: "Topic currently unavailable." Is there a solution that does not involve connecting the two computers with an Ethernet cable?

Is Firewall turned off on both machines?

Ichat Screen Sharing will not work no matter what I try...

I have read all the forums and can't find an answer. Something that should be so simple such as screen sharing through iChat (as advertised) is virtually impossible. This I can not explain. Especially since video chat works!
Both computers in question here are macbooks, both have leopard, both are or wireless networks. Is the router blocking the connection and if so, why will it allow video chat but not screen sharing?
There is either something real simple that I am missing here, or this is not possible at all.
some things that i have tried:
disabling stealth mode
on the firewall, enabling incoming traffic from ichat
made sure screen sharing is enabled in ichat
made sure the settings were the same on the remote apple computer
tried unchecking everything in the sys pref "sharing"
Both of the parties involved are using the same ISP, this really is mind boggling.
Is this a bug that is being fixed or what? I am not trying to perform a miracle here, but this is getting ridiculous.
If this is a router issue, apple should release some documentation on how to configure ichat screen sharing through your router.
If anyone has had this problem and has a fix, I would love to hear it. Keep in mind I have googled this many times and tried just about every piece of advice that I could find on this.
Thanks

iChat Screen sharing does not as such for the screen bit use the Video/Audio port.
The Documentation was lacking last time I looked.
This one tells you the port changes in Leopard http://docs.info.apple.com/article.html?artnum=306688 compared to Tiger
Tiger is linked in the first to here http://docs.info.apple.com/article.html?artnum=93208 where most of the other ports are.
However Screen sharing was not part of iChat 3.
If you do a Quick Look at the .plist(s) you will see the reference to ARD which is Apple Remote Desktop which is what the screen ending part is based on.
This Doc will tell you which ports ARD is likely to use
http://docs.info.apple.com/article.html?artnum=106439
(It says 5900 and 5988)
This should be allowed through the use of UPnP in your routing device or specifically opened.
Now the not so good news.
I run Little Snitch, A utility that tells you ports and IPs of incoming and outgoing network connections by any app you have.
This has told me that in fact the Screen port seems almost completely random normally in the 50000 range of ports
It may not be all you wnat to hear but I hope it helps.
9:57 PM Tuesday; February 12, 2008

Screen Sharing won't work.

Similar Messages

Maybe you are looking for