Computer-to-computer Airport network no dice - "self assigned IP address"

I have spent hours reading posts on this and other forums about this problem with Airport, but none of the fixes have connected me to the Internet. My new iMac has a DSL line coming into it and an Airport card. My eMac has an Airport card too. I am not using a base station. The eMac recognizes the network I created, it even allows file sharing, but in the TCP/IP prefs, I get the dreaded notice about how the computer is using a "self assigned IP address and may not connect to the Internet." So I took one user's advie and set it up to use DHTP manually and I typed in an IP address of 10.10.10.x and my "network status" finally went from the yellow dot of death to green, saying I was connected to the Internet. But my browsers sure don't think so. I turned firewall off. Still no help. Do I have to turn firewall off on the iMac, from which the eMac is getting its Airport signal? I need a firewall, right? "Firewall good," right?
The issue was the IP address until I entered a manual one. Now the issue has changed. I am connected to the network, and at least technically to the Internet, according to the computer's ability to gauge such things, but I'm still not online. I have done the "unplug the DSL modem" thing, and unplugged the computers, and turned Airport on and off, trashed Airport prefs from the Library and all the sensible things people have mentioned online. I am hoping some fresh eyes see this. Can it have to do with my iMac's settings, not the eMac I'm having trouble connecting with? I've spent about 12 hours on this with no luck. Thanks,
George

O.K., I tried to launch the specified site in Safari and it never loaded anything or gave me an error message. The blue filled up the address bar to cover up "http://" but it didn't progress further. The IP address it self-assigned is 169.254.60.164. My iMac which should be Internet-sharing is not sending it a proper IP address.
Both computers are up to date with updates. The iMac has OS 10.4.10, and the eMac has 10.3.9 because I still run Classic mode. I don't know enough about computers to know if those system differences would cause a problem in Airport. They both have Airport Extreme cards. Any idea which settings in the source iMac I'm sending out the Internet signal from could cause this problem? I have personal file sharing on, personal Web sharing, and printer sharing.
In my Network preferences, under my SBC DSL, the IP address looks normal, starting with a 75, but under Airport, it starts with 169.254 like the eMac's IP address setting. I don't really understand these technical issues, and I've never dealt with a wireless network before. I guess I can always pony up $180 and use a base station, and problem solved. I would think. But computer to computer Internet sharing is supposed to work, so now I am obsessed with it. Thanks again.

Similar Messages

Airport Connects but has Self-Assigned IP address and no internet

All right Apple this is some Bull#@$% I own 3 Apple units One is a MacBook Pro, one is a Macbook and the other is a G5 Dual processor tower. The MacBook and Tower are using OS X 10.5.5 and the MacBook Pro has OS X 10.4.11. Ok here is my problem all of a sudden all 3 units that had been connecting to the same wireless router for the past year started saying (AirPort has a self-assigned IP address and may not be able to connect to the internet) Apple Care suggested replacing the router well I did that and hello I have the same message. Its connecting but not going to the internet. Under network status I have green lights for Airport and Airport settings a yellow light for network settings and red lights for ISP, Internet and Server. I have this problem with both MacBooks both at the library, my friends house and my neighbors house thats 4 different wireless networks that do the same dang thing. I need help!!

I have also encountered this problem and I have been researching it all over the internet all evening and trying everything I could find a suggestion for. Here's what I have: Two G4 Powerbooks, one is a 550MHz 15" Powerbook, the other is a 1.5 GHz 17" Powerbook, they are both running 10.4.11 with all the updates that Software Update has to offer, the 17" is connecting via built in Airport Extreme card, the 15" is connecting via Sonnets Aria Extreme PC card. I have AT&T DSL and I'm using the 2Wire modem/router they provided me with. Neither of the Powerbooks can connect wirelessly to the internet. Furthermore, they cannot even ping the wireless router. 4 days ago, both were connecting without any trouble (and had been able to reliably every day since the beginning of August when I hooked everything up). I have made no changes to my router's settings over the weekend. Nor had I made any changes to the Powerbooks' settings during that time. It just stopped working. If I wire one or both of them to the router with ethernet cables, connection works fine. My Desktop G4 which is normally wired into the router via ethernet, connects fine so I know my internet service is available.
So far, I've restarted both machines numerous times, restarted the router numerous times. Reset the WEP password. Changed the wireless security to WPA. Changed it back to WEP. Trashed the airport plist. deleted every wireless network entry in Keychain. Disabled DHCP and assigned IP numbers manually. Changed the wireless channel (I've tried 1, 6, and 11 with and without interference robustness).
I've been reading posts about this issue on half a dozen web forums (dating back to as early as June 2004). It appears to affect a variety of routers (2Wire, Netgear, Linksys), a variety of machines (Powerbooks, iBooks, MacBookPros, iMacs) a variety of OSes (10.3, 10.4, 10.5).
This thing is really getting me down. Anybody have any other ideas?

Airport extreme 4th generation - self-assigned IP address

2 Airport extreme 4th generation with latest firmware. extented network in bridge mode.
After switching providers, I reset both my airports and set them up new accordingto manual.
Only some devices (less than 50!) at times can't get an IP address.
Error msg: Airport has a self-assigned IP address .......... and will not be able to connect to the internet.
My new provider told me it is an internal probem. Quote: This is an internal issue between your devices and your internal routers. we only gives an address to your router and it is your router that gives your devices an address.
My question is, which part of the manual settings in Airport Utility affect the distribution of internal IP addresses?
or how to change my set-up to avoid the problem I'm experiencing?
thanks a lot.

When in brigde mode your provider has to supply at least one IP address for each devices you want to connect.
Alt. turn bridge mode off in Airport Utilities and let your Base station distribute IP addresses. For that you have to enter two DNS addresses.
HTH.

Seeing Airport extreme an a self-assigned IP

I am running 10.5.3 on a powerbook G4. Recently I have been unable to connect to the network even though the airport can be accessed, but the airport is establishing a self-assigned IP address. Any ideas? The network has a wep transitional password.

I would try changing the wireless channel on the router and eliminating wireless security temporarily.
If that solves the problem, try enabling the wireless security again.

Self-assigned ip address starting with 169

Trying to connect to free wifi in paris but my gf's computer won't connect, instead it gives me a self-assigned IP address starting with 169, any thoughts on how I fix this?
Free wifi is a very big network in Paris, you only need a username and a password to sign in and can get connection almost everywhere in the city.
It works on my computer, but not on my gf's. It also works on my iphone, it's only her computer that doesn't connect. It worked on her computer aswell until yesterday evening.

Self-assigned IP Addresses 169.254.xxx.yyy are the ones your computer gives itself so that it has a name while it broadcasts a request for a better IP address. A self-assigned IP address usually persists for only a second until your Router responds with a good address. Finding yourself still stuck with a self-assigned address means you cannot reach the Router.
You should look for really fundamental problems. Is the connection method you prefer the top one in the System Preferences > Networks box? Are you too far away for a good connection? If all seems OK, use the ( Assist Me ) button in that panel and follow the Setup Assistent [not the Network diagnostics] branch to establish a good connection.

Rebuilding aMacBook 1.83 GHz Intel Core Duo, hard drive failure so rebuilding system. Aircard will not stop self-assigning IP address. Any ideas how to resolve successfully?

Had hard drive failure on MacBook 1.83 GHz Intel Core Duo, so had to rebuild the OS on new drive. Was on Lion 10.7.5 prior to failure, but had to reinstall Snow Leopard 10.6.3 since that was most recent OS on media I had. After finally getting ethernet connection to router working, was able to get to internet and download / upgrade to 10.6.8. I assume I can probably buy the upgrade to Mountain Lion 10.8 from there.
Problem is this, Airport will not stop self-assigning IP address for my wireless connection, and unless I can get wireless back on this laptop, doesn't make a lot of sense to continue the rebuild and reinstall of all the software that was on it prior to HD failure. Only way to my home network and router is ethernet now. Everything else on my network (Apple MacBook Pro laptops, iPhones, desktops, and non-Apple printers and laptops) is hooking up to router wirelessly fine.
Any ideas how to resolve successfully so that the airport will stop self-assigning and allow the router to assign the IP address?

When see the beachball cursor, note the exact time: hour, minute, second.
These instructions must be carried out as an administrator. If you have only one user account, you are the administrator.
Launch the Console application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad and start typing the name.
The title of the Console window should be All Messages. If it isn't, select
          SYSTEM LOG QUERIES ▹ All Messages
from the log list on the left. If you don't see that list, select
          View ▹ Show Log List
from the menu bar at the top of the screen.
Each message in the log begins with the date and time when it was entered. Scroll back to the time you noted above.
Select the messages entered from then until the end of the episode, or until they start to repeat, whichever comes first.
Copy the messages to the Clipboard by pressing the key combination command-C. Paste into a reply to this message by pressing command-V.
The log contains a vast amount of information, almost all of it useless for solving any particular problem. When posting a log extract, be selective. A few dozen lines are almost always more than enough.
Please don't indiscriminately dump thousands of lines from the log into this discussion.
Please don't post screenshots of log messages—post the text.
Some private information, such as your name, may appear in the log. Anonymize before posting.

Self-assigned IP address problems

I'm having a problem with my wireless router connection (my Airport card shows the network, but the "fan" is greyed out, and if I choose the network it still doesn't connect - When I check network status I get "AirPort connected to network, but has self-assigned IP address and may not be able to connect...)
I can temporarily fix the problem by going into System Preferences to Network to Airport to Preferred Networks to Assist Me and THEN it will go to my network and turn on the path.
I'm running Tiger 10.4.11 on a G5 iMac with the original AirPort Extreme card, and routing through a Linksys WRT54G attached to a cable modem.
There are a lot of networks in my area, according to my wireless "fan".
If changing channels on my router might fix this, I'd like to give it a try, but I don't know how, AND I don't want to ruin the signal to the other computers in the house, which, by the way, work just fine when the iMac loses the signal.
If there's another way to tell the router to ignore the self-assigned IP address, or to get the AirPort to stop providing this ...
The problem is obviously the self-assigned IP address. The question is what is causing this?
Is it the AirPort Extreme Card?
Is it the Linksys Wireless router?
How do I test to see which it is, without losing the signal from the router to the other computers in the house?
With so many people having the same problem, there must be an answer somewhere.
Can some kind soul please point out the correct path? My tech support (teenager) will be home from college this week, and if I can prove to him that it won't ruin everything I think he'll be up to the challenge.

Hi,
Thank you Linc & dwb, I've had no issues with the router in the 14 months its been installed. But tonight I've turned off the NAS and since then no drop off for wifi/ or assigning itself an IP address.
I will switch on the NAS once again and see what happens, would it be best to assign a static IP to the NAS? One thing I have found when checking the homehub connection details, the mac air connects at the 5Gz Wireless as does the Kindle, which has also suffered from losing the wifi connection, where as my macbook pro only connects at 2.4Gz and like I said has not had any issue. Not sure if this anything to do with the problem or not?
All I do know is that since the NAS was introduced then the problems began, so again not sure if its the NAS impacting on the router or a router setting?
thanks

Apple Mac wireless self-assigned IP address help

I just got FiOS today. Everything appears to be working fine except for one thing, my Apple Macbook Pro, running 10.5.8 is getting a self-assigned IP address when I connect it to my FiOS wireless router (ActionTec MI424-WR).
The Mac has a physical connection to the wireless router. The "My Network" tab in the wireless router configuration screen shows it as connected, with an assigned IP address of 192.168.1.6. However, the ping test fails, and the Mac's Airport settings show a self-assigned IP address.
I've tried rebooting everything, turning airport on and off, and renewing DHCP, but nothing is working.
I haven't touched any of the default settings on the ActionTec, it's still running WEP.
I did verify that my firewall is turned off on the mac.
What else can I try?
Solved!
Go to Solution.

I have a 6 month old MacBook Pro running the latest version of OS X, so it's affecting newere Macs as well. I found some on-line discussion that it's a problem with only the Macbook Pro.
FWIW, a few hours after finally getting it working it happened all over again. I had wireless connectivity but only got a self-assigned IP address. I tried shutting the airport on and off, deleting the wireless key from key chain, and clearing the wireless network. However nothing worked until I rebooted the Mac.
I then checked the firmware on the ActionTec and found it was 20.8.0 and 20.9.0 was the latest (mind you I just got this router installed today). I updated to the 20.9.0 release and everything has worked for about the last 6 hours. Fingers are crossed. :-)

My ipad recognizes my home network but will not connect to the internet. When I click on AirPort/preferences at the top of the imac screen it says..."AirPort has a self-assigned ip address and may not connect to the internet".How can I change ip address?

My ipad recognizes my home network but will not connect to the internet. When I click on AirPort/preferences at the top of the imac screen it says..."AirPort has a self-assigned ip address and may not connect to the internet". If this is the root of the problem,how can I change ip address?
Ipad will connect no problem to other networks.

First thing you need I think is to get your iMac connected to the Internet.
Shut down your iMac and you iPad. Then power off your router. Wait 30 seconds and power up the router.
After the router indicates that it is connected to the Internet then start up your iMac and see if it connects. If the iMac connects to the Internet then your iPad should too.
If this power up sequence doesn't work you'll have to dig into the router setup to make sure it is working properly.

Self Assigned IP Address with Airport Extreme

I just changed my router from an Asus to AIrport Extreme.   The Airport Extreme is connected to an ATT DSL modem. I know the modem works because I can connect to the internet when I connect it directly to my IMac. However, when I try to access the internet through the airport extreme it connects temporarily and then loses the connection. It tells me that I have a self assigned IP address and cannot connect to the network. This is the case through both Ethernet and WiFi. It is also the case when I try it with other devices (e.g. IPad, MacBook).
I know there are lots and lots of threads in this forum (and others) on this topic. I have been pouring over them for days and trying everything I could find including but not limited to--
Rebooting/power cycling
Keychain clearing and repairing
Renewing DHCP lease
Turning off firewall and virus barrier
deleting and recreating network
The modem is set up based on the ATT instructions for when it is to be connected to a non ATT router, thus it is in Bridge mode and the Airport Express is set to use PPPoE.   OS and all firmware is up to date.
There is another issue which may or may not be related. It is also an issue for which there are many existing threads (but apparently no definitive solution). My Imac keeps giving me a message that the name of my computer is already in use and has been changed to.....
http://https://discussions.apple.com/thread/4207056?start=0&tstart=0
I have tried several suggested solutions (e.g. energy savings pref, using only wifi or only ethernet to connect). So far no luck.
Both of these issues seem to have started when I switched routers.
Anyone know if the two issues are related? And whether there is a solution? Seems like both issues have been around a long time.......

Was using the wrong password option in UIXperts driver. Kept thinking it was a different protection mechanism than it was. Once the password was set, all was well. Referred back to the IOXperts installation guide (RTFM) for a clue.

Airport: Self-assigned ip address, can't connect (public routers only)

this has been talkeda bout before, but is extremely frustrating, because i don't have the problem with a PC.
1/2 of the public routers i connect to have some kind of login page, most the time they just say "youre getting free internet, click here" ... but sometimes that login page never comes up, and the network card says "airport has a self-assigned ip address and may not be able to connect to the internet"
this only happens on pulic routers for me, and only ones that have login pages.
its very odd because for example, starbucks has all the same routers, all are "attwifi" now .. i go to one, i get hte login screen, go to a different one, i don't get it...and can't connect
with a PC, i get it every time.
this is undoubtably a leopard problem, that needs to be fixed. please!

The wifi icon shows no connection with the network -- the "!" mark.
However the computer sees the network, i.e. when I search in Network Preferences the network is listed.
So: 1) the computer sees the network but 2) will not connect to the network. The reason given for refusal to connect is "self-assigned IP address".
Not to be repetitive but two other Mac laptops are connected to the same network and working perfectly. The network preferences, as shown in the "advanced" section, are the same for all machines, i.e. DHCP is selected and IPv6 is Automatic.

"Airport has a self assigned IP address & cannot connect to internet"

Hi, I'd appreciate any insight at all on this...
Apologies in advance for this vast post...!
(but I guess I may as well mention everything I've already tried...)
BACKGROUND:
I was recently trying to add an Airport Express Base Station to an existing ethernet and wireless network, which has been working flawlessly for 3 years.
(Network consists of an ethernet-connected G4 Dual 1.42 desktop running OS X.3.3, and two wireless-connected iBooks- one a 12" running OS X.3.5, the other a 14" on OS X.4.2).
For various reasons, I've now given up with the Airport Express, but ...
PROBLEM:
On the wireless 12" iBook- "Safari can't open the page "xxx" because it can't find the server "xxx"- ie, the internet connection is now wonky.(The problem is the same in Firefox, IE, and Camino too).
The fault must be with configuration on this laptop, as the other two machines on this network are still running and connecting normally with no problems at all.
What is the cause of this problem? (IP addresses? DNS server?)
WHAT I'VE TRIED SO FAR:
1. First looked at System Preferences --> Network --> Network Status, where I see this;
"Airport is connected to the network "Fritz!Box SL WLAN". Airport has a self-assigned IP address and may not be able to connect to the Internet."
Alongside it an amber button (which is usually green).
Then according to JohnHuber1's suggestion in Discussions on May 3rd 2006;
"Go to System Preferences --> Network and double click on Airport to open its preferences. Click on theTCP/IP tab and select Configure IvP4: "Using DHCP" and click on Apply Changes to save it."
I tried toggling this (it was already set this way), and then Restarted, but it hasn't helped.
I also tried clicking the 'Renew DHCP lease' button. Also hasn't helped.
2. Repaired permissions. It hasn't helped.
3. Read Apple KB article No:106798- 'Troubleshooting "Server could not be found" messages'.
From this article, it seems that
a) The problem cannot be caused by "an actual loss of internet connection", as the other 2 machines are still connecting fine.
b) Typing http://17.254.0.91 instead of http://www.apple.com makes no difference, therefore it doesn't APPEAR to be a DNS server problem. (?)
4. Tried to reconfigure the Airport settings using Network SetUp Assistant.
This allows me to select Airport as my connection method, select the network from the list; but once I've entered the network password and pressed 'continue', it then gives me a dialogue box, saying
"Unable to establish a network connection. Your computer could not connect to the internet. Click OK to go back and change your network settings and try again".
Returning to Network Prefs, I now see a box saying "Your Network Settings have been changed by another application".
I can't seem to get out of that vicious circle.
5. Opened a fresh Test Account, behaviour is the same here as in the regular user account.
6. Opened Network Utility, tried to 'Ping' on 17.254.0.91 (Apple site). Then tried to Ping my network router (192.168.178.1), and then also the other 2 computers on the network. Result in each case was "10 packets transmitted, 0 packets received, 100% packet loss".
What can I do to fix this problem? I suspect it's some small configuration checkbox in Network preferences which I've inadvertently altered.
But have I got any idea what I've done...?
Sorry for the epic post. But you get the idea...!
Thanks for your thoughts...
G4 Dual 1.42, FW800, 2GB RAM, (OSX.3.3), iBook G4 (1.2ghz, 1GB RAM, OSX.3.5) Mac OS X (10.3.3) 3 int.HDs, 3 Lacie ext.HDs, Logic Pro 6.4, RME Fireface 800.

Hi Grant, thanks for jumping in...
Have you removed the troublesome Airport Express?
Certainly have, that was Step 1 several days ago!
Are you using encryption?
Yes, I have to enter a password every time I've tried to use Network Set Up Assistant. I'm pretty sure I've got it right- it won't accept anything else.
Have you limited your network to only certain M.A.C. Addresses?
Not as far as I'm aware. Could I have done it inadvertently?
Is the Wireless Router set to allow the connection of slower 802.11b devices like the iBook?
Guess it must be... it worked fine before, and is still ok with the other 14" iBook.
Are you connecting to a Wireless Router and not to another Macintosh computer?
Hmm... I ASSUMED I was connecting to the WLAN router. The G4 desktop has no wireless capability itself, could I still be connecting to that regardless?
Internet access has never been affected in the past by that machine being on or off...
You will not be able to get anywhere until you have an IP address in the same subnet as your Router
(generally high octets the same, last octet different). Can you think of any reason why your Router
should not give you an IP address in this range?
Err... now I'm lost, sorry! What's an octet?
I really appreciate you taking the time to help me out Grant... sorry I'm not really up to speed!
Cheers, Andy.

AirPort Express won't connect because of self-assigned IP address

For years, my old AirPort Express worked just fine. Then it quit (no little lights, no action), so I bought a new one.
Now I am running into the dreaded "apple self-assigned ip address 169.254.29.74" error, which is apparently a chronic Apple thing. There's discussion all over the internet about it, and nothing seems to help.
First, the equipment:
AirPort Express
OS X 10.6.8 (Please don't tell me to upgrade because my old hardware won't support the newer OS)
Processor 2 GHz Intel Core 2 Duo. (I don't have money for a new computer and this one is working fine except for this glitch)
Memory 1 GB 667 MHz DDR2 SDRAM
Actions taken so far:
Ran the AirPort setup utility (at least ten times)
Reset the AirPort to factory specs (at least ten times)
Deleted all the old Keychain references to the old network
Deleted all the old preference files, including one for a firewall
Reset the cable modem (five or six times)
Powered down the cable modem and turned it back on (only two or three times)
Physically typed in the IP address that works for Ethernet, but got the error message that it's being used by another device (This is insane because all the other devices that could connect are physically powered down. There's only one live computer trying to connect.)
Results:
I can get a new network to show up on the AirPort icon.
The Network part of System Preferences tells me that the problem is an apple self-assigned ip address 169.254.29.74 that won't connect. ("I made this and it's useless. Aren't you proud of me?)
Questions:
The documentation says this equipment will work with Snow Leopard. Is the documentation wrong? Should I try to find a simpler wireless router that doesn't demand as much from the computer?
Perhaps the AirPort is simply broken and I should return it for a new one?
Is there some secret work-around to defeat that self-assigned IP address glitch?

I am pretty sure the Express is running in the wrong mode..
The idea to plug the computer in is to check the setup.. not to need it permanently like that.. you can use either wireless or ethernet on the new express.. the old one you could only use wireless.
Please give me a screenshot of the setup of the express.
It must be in router mode.. ie when you open the airport utility and click edit.
Then go to the network tab.. it must show DHCP and NAT.. the DHCP range does not much matter..
But I also need to see that the wan port is getting an IP correctly.

Airport self-assigned IP address not able to connect to the internet

I installed airport into my eMac and have been using for over a month with no problems. Today I crashed using iWeb and had to restart with the startup button. Upon restart I couldn't get onto the internet via airport. The computer gets on via ethernet and my MacBook can still access the internet via airport. When I am trying to connect with airport I am told I am connected to my wireless network but the System Preferences>Network with Location set to Automatic, Shows Network Status as "Airport has a self-assigned IP address and may not be able to connect to the internet." I cannot for the life of me figure out how to make it not self-assign an IP address. I hope someone out there can.

Ouch I was hoping someone would have replied after I went to bed last night.
So I looked at some other posts and tried running applejack to no avail. I also removed the network from my prefered selection and reselected it to see if the WEP was the porblem, it wasn't. Then I switched to manual selection of IP and typed in 192.168.0.1 with subnet mask 255.255.255.0. This got rid of the self-assigned IP note but when I tried to use Safari it still said I wasn't connected to the internet. Ugh. Could removing and replacing my airport card fix this problem?

Airport " Self Assigned Ip Address" Issue SOLVED

Hi Guys,
I finally solved my problem and i just wanted to share for those who are in the same predictament. Well, for starters i have an iMac OS X Desktop. I recently just started having problems with my airport connection. I would get the following message. " Airport has a self-assigned IP address and may not be able to connect to the internet"
Now, this post is specifically for those who have tried other solutions and had no luck such as my self. Also, for those who are trying to share connection from the ethernet to airport. I have tried the "New Location" Method, The turn airport off and on method etc
So, i had to investigate myself and i have found a quite simple solution.
1. Go To > System Preferences > Network ( You should be on the exact image above )
2.Highlight Ethernet > Copy or write down The IP Address > Press the left arrow at the top left of the page, In other words go back.
3.Now Highlight Airport such as the image above > Click On " Advanced" at the bottom right of the screen.
4. You should be at the screen SIMILIAR to the one above ( depending on your computer) > Where it states " Configure IPv4" Select " Using DHCP with manual address " from the the drop down menu.
5. Where it states " IP Address" Enter your "Ethernet" IP address that you copied in step 2.
6. Click on " Apply Now" at the bottom right of the screen > A second message should now pop up confirming whether to " Apply Now " " Don't Apply" or whatever it says on your computer, just continue on clicking "Apply Now" or " Continue" , " Okay" or whatever the exact word is on your computer.
7. Go back to the original network screen, such as the one shown in the first image. ( System Prefrences >Network) , & Airport should now say connected.
So, that's what worked for me. Hopefully it will work for you too. If you need help with anything feel free to comment and i will reply soon as possible. I know how annoying this problem was for me so i am willing to help.

I'm glad it worked for you. Okay, if I understand you correctly, You are asking what password do you need when connecting to wifi on the other device ? If so, it depends on how you have your network setup. For starters, I would need to know your network specifics before I can answer. Is it an unsecured network ? Such as, your cable provider "optimumwifi" or "xfinitywifi"? Or did you create the network yourself ? If you are connecting using the Internet your cable provider provides from the modem, you do not need a password. If it asks you for an password, try using the password you used on your cable providers website. If you are using a created network. There are a few steps to retrieve the password. Also, it depends, What type of device are you trying to connect too ?

Computer-to-computer Airport network no dice - "self assigned IP address"

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