One SOLUTION for "self assigned IP address"

Hello there, dealing with the nasty issue of "self assigned IP address" has been my latest two days nightmare, I tried lots and lots of solutions I read in forums here and there without getting to a point.
I started this post because I want to post here a solution that really worked for me and I haven't seen it posted over the web.
I don't remember where but I saw the comment that WEP encryption by the router is not very mac compatible as opposed to WPA. So a while ago when I entered my router home screen (Thomson TG585 v7) I saw the option to enable WPA-PSK encryption and went for it, I can tell you it inmediatelly got me online and till now my airport wireless conection is working perfectly.
I'm not any mac/web guru and maybe I'm stepping some technical details but I want to share this tip with all of you because I know it can be a really nasty problem that one of the gat dam "self assigned IP address" and this may help somebody else. ;-)
Best regards
Luis Erantzcani

Great tip Luis, thanks!

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Self assigned IP address partial SOLUTION

Hello there, dealing with the nasty issue of "self assigned IP address" has been my latest two days nightmare, I tried lots and lots of solutions I read in forums here and there without getting to a point.
I started this post because I want to post here a solution that really worked for me and I haven't seen it posted over the web.
I don't remember where but I saw the comment that WEP encryption by the router is not very mac compatible as opposed to WPA. So a while ago when I entered my router home screen (Thomson TG585 v7) I saw the option to enable WPA-PSK encryption and went for it, I can tell you it inmediatelly solved my conection issues and till now it's working perfectly.
I'm not any mac/web guru but I want to share this tip with all of you because I know it can be a really nasty problem that one of the gat dam "self assigned IP address" and this may help somebody else. ;-)
Best regards
Luis Erantzcani

Hello, thanks for the tip/post, & a warm welcome to the forums!

Self-assigned IP address problem - My solution

I am new to this board and created an ID just to write this post. When I searched for this self-assigned IP problem, I found almost 1 million results on Google so obviously I am not alone.
I have this problem off and on on the wireless network at home with a Netgear router. It has never happened at my office with a D-Link router. Never happened at Starbucks or McDonalds (yes, they all offer WiFi here). But it happened at one Pizza Hut and it also at Christchurch airport about a week ago.
Deleting one of the plist files worked once at home many months ago but this week nothing worked. My Mac usually goes back to normal by itself after I "****" it out at other WiFi networks but not this time. As a last resort, I asked my brother (our family's I.T. guy) to change the router as I had not tried that fix. He didn't do it but a day later, he gave me to oddest solution that worked in a blink of an eye.
The solution? Key in a wrong password!!!
1) Go to Keychain Access, delete the keychain for the problematic network.
2) Connect back to the network
3) Enter a WRONG password that is similar to the right one. For example, if your password is Apple123, try APPLE123. You should still connect to the network and get a self-assigned IP.
4) Repeat Step 1. To be safe, you might want to re-boot now. I did but probably didn't have to!
5) Repeat Step 2
6) Enter the right password
I'm not all that techie so all I understood from what he said was:
1) It's probably a non-Apple router bug
2) It's a hex key problem. The password wasn't being encoded/decoded properly so the router wasn't assigning the computer an IP address. Wasn't even reading the password which is why I could connect with a wrong one.
He deduced that from reading a post from a guy in Spain who thought he had carelessly entered the wrong password and was wasting the community's time with his posting. I had read that post a couple of days ago too! But obviously I thought the Spaniard had just entered the wrong password and there was no fix for me to try out. My brother is a genius!
I guess it then makes sense why fixes like:
1) Disabling the firewall
2) Deleting preference lists
3) Deleting keychains
4) Changing the router
5) Renewing DHCP lease
6) Resetting the router
...have worked for many people and not others. None of them actually fix the cause of the problem. Having searched for 3 days, I could not find the REAL reason why this happened. Personally from all I have read, I think it must be a hex key problem with Netgear and Linksys routers. I see those 2 names mentioned a **** of a lot. Maybe it's another one of those gadgets built more for PCs that don't work perfectly with Macs all the time. We used to have an Apple Airport Extreme base station but that got fried by lightning. It was not cheap.... So technically, it really isn't Apple's problem. I think if we used an Apple router, we wouldn't have a self-assigned IP address. Maybe that's why they haven't "fixed" the problem after so many years.
Anyway, let me know if my brother's fix worked for you.
This is my good deed for the weekend! Goodnight....!

Hello, thanks for the tip/post, & a warm welcome to the forums!

Problems using MBP as WiFi router for iPad2 (self-assigned IP address)

H/W& S/W:
MBP 15" (model early 2011), running Snow Leopard,
iPad 2 WiFi only, 64Gb, iOS 4.3.4 (8K2).
Scenario:
I am in a location where there is no WiFi. MBP is connected via Ethernet to a DSL network, and has access to the Internet. I turn on Internet sharing, having set the following:
"Share your connection from" set to "Ethernet" and
"Share computers using Airport" ticked.
Previously, I have then connected the iPad 2 via WiFi with the WiFi network created on the MBP, and succesfully worked from the iPad on the Internet (email, browsing, app downloads, ...).
Problem:
Now, however, the iPad connects to the MBP's WiFi network, but when I attempt to access the Internet, I get such messages on the iPad as "Safari is not connected to the Internet" or "Cannot Get Mail ...".
On investigation, I see that Airport on the MBP is in a YELLOW status: Status On, with the note "Airport has the self-assigned IP address 169.X.y.z, and will not be able to connect to the Internet".
On the iPad, the WiFi network shows the IP address 169.X.a.b (with a subnet mask (255.255.0.0).
I have tried:
1. turning Airport off and on
2. renewing the DHCP lease on the MBP
2. configuring IPv4 address in the MBP manually
3. configuring the IP address manually on the iPad (not expecting anything with this, but ....)
4. fixed Permissions" on the MBP disk (suggested on another support community web site)
But none of these make any difference.
Message was edited by: WKH
forgot to mention: Firewall is disabled on the MBP.

Hello,
I've had the exact same problem on my macbook and it really **** me off ! I tried all of the solutions written in this forum and none worked for me ! I was really starting get mad especially that my macbook is quite new...
And the thing is i have no Apple Store where i live which is a pretty F***g problem so I had to wait for vacations to go to france where I took my macbook for check at the apple store...
I just came back right now and my wifi works till now a least far much better than before...The guy was really nice he checked everything and he tried all the solutions on this forum too..Finally he tried to boot from one of '' apple's '' usb that has suberb booting systems...And it worked so finally he re-installed 10.6.5 as it was '' corrupted '' with wifi bugs ! For that he needed to delete everything on my macbook ! GREAT !
After 15 minutes the installation was done and it started like when you buy a new macbook !
And VOILA the Wifi came back to normal !
Hope this helps...
If you have this problem go and see Apple Store or re-install yourself 10.6.5 !
Thanks !

All of a sudden I started getting "Self-assigned IP address ... Can't connect to internet" message when I attempt to connect to wi-fi at home. I tried solutions posted on the net but to no avail.

It once worked when I removed it from Network preferences and attempted a relogin - but the problem resurfaced again and is not going away. I tried the "key chain access" solution - but my Wi-Fi doesn't show up in "Sytems" at all. Any help will be appreciated. It's OS 10.6.9 MacBook Air.

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.

Hey, for some reason i turned on my macbook pro 2012 and it says i have no internet access. I then found out that it also says that my self assigned ip address will not connect to the internet. How is this and how can i fix it?

hey, for some reason i turned on my macbook pro 2012 and it says i have no internet access. I then found out that it also says that my self assigned ip address will not connect to the internet. How is this and how can i fix it?

Reset your modem.

Why does my Airport Express say "self assigned IP address"? No IP address for the ethernet, and it is not connecting to my cable router any longer...

Why does my Airport Express say "self assigned IP address"? No IP address for the ethernet, and it is not connecting to my cable router any longer...

Some cable providers.....like mine, a well known company......seem to take anywhere from a few moments to sometimes up to 30 minutes to allow their equipment back at the cable company to fully reset and issue a new fresh connection.
So, it would not hurt to leave things powered down for 15-20 minutes or more when you perform the reset that John Galt suggests.

Wifi works for everyone but me - I get a "self-assigned IP address" and no Internet connection

I have the most confounding Wifi problem. I just got Verizon Fios, and it works perfectly on my roommate's laptop, his iPad, and on my iPhone. But it doesn't work on my Macbook Pro (running Lion). My Macbook has no problem connecting to other Wifi signals - in fact, there's another connection in my building that I can connect to just fine from my room.
When I try connecting to our own Verizon signal though, the Macbook hunts around for a few seconds, then connects - but says there's no Internet connection. I get an ominous exclamation mark over the Wifi icon. My computer gives me a "self-assigned IP address" and says it can't connect to the Internet.
I've tried everything I can think of: Restarting the computer, turning Wifi off and on, deleting and then re-accessing the signal, turning the firewall on and off, renewing the DHCP lease, restarting the router, switching channels on the router, and more. At this point, I'm out of ideas. Any suggestions?

Please try each of the steps that follow, in order, until resolved:
STEP 1 - Create a New User Account
System Preferences > Accounts
Click "+" to add a new account.
Log off, and then, log back on with the new user account.
Try connecting to a Wi-Fi network with your Mac's AirPort.
If this resolves the problem, there may be something amiss with your current profile and will require further troubleshooting.
If this does not resolve the problem, go ahead and log back into your normal account and go on to the next step.
STEP 2 - Preferred Networks
Delete Preferred Network(s)
System Preferences > Network > Select AirPort > Advanced > AirPort tab
Under Preferred Network, use the minus button to delete the network(s) you regularly use from the list.
Delete AirPort Keychain Entries (Note: This only applies if you connect to AirPort/Time Capsule routers)
Launch the Keychain Access application located in the \Applications\Utilities folder
Click on the "Kind" filter at the top, and look for any "AirPort network password" entries, and then, delete them.
Restart, or log out, then back in.
Add Preferred Network(s)
System Preferences > Network > Select AirPort > Advanced > AirPort tab
Under Preferred Network, click on the "+" button to add any preferred network(s).
Restart, or log out, then back in.
STEP 3 - Move System Configuration Files
Note: You will have to reestablish your network connection settings.
In Finder, go to the Macintosh HD/Library/Preferences folder.
Move (not copy) the SystemConfiguration folder to the OS X desktop.
Restart your Mac. (Note: OS X will automatically rebuild this folder and the associated files contained within.)
If this doesn't resolve the issue, you can move the folder (now on the Desktop) back to its original location.

Solving self-assigned ip address for Mountain Lion

Like every thread I've ran into, so far, I'm also having iissues resoloving the self-assigned ip address "nightmare" on my 2009 MBP after ugrading to Mountain Lion. I've tried everything the threads have suggested, ranging from creating new locations to deleting network preferences. Does ANYONE have a solution that worked?

Do this the stuff you find at the bottom of this thread:
https://discussions.apple.com/thread/3864270?tstart=0

"self-assigned' IP address.

Firstly to be semantic. Part of my frustration at this problem is the fact that Apple call this a "self-assigned" IP address. In no way have I assigned this IP address myself. My Macbook Pro assigned it for me.
I have had this problem intermittently since I bought my Macbook Pro years ago. The first time I found a solution by renewing my DHCP lease and sometimes that would work, sometimes not.
Second fix is a reboot, third fix is to make airport inactive and then re activate it again, fourth fix is to add new location from system preferences and then start from fix number one again
I have also tried various commands suggested for terminal and tried deleting folders that have been suggested as the cause.
But now returning from a trip overseas I get the "self [apple] - assigned IP address" message and none of the fixes that I have wasted my time applying in the past are working.
It's almost comical because just a week ago I was saying to somone how I was thinking of moving to PC as I had had enough of trying to fix problems with my Mac.
Hours of trawling the internet for a simple walk through of the problem suggests anything beyond what I have already tried. I can't believe I have put up with this issue for so many years, just accepting that it's a small problem that occaisionally interupts the massive benefits of using a Mac.
So if anyone has a final suggestion of where to go to fix the problem [on line] I would be so releived of my frustrations. If not then I am heading out to buy a PC tomorrow and I will take great pleasure in destroying my Macbook Pro.

I have a little Macbook that connects to my wifi connection automatically without any problems and always has.
I have a much more expensive, much more powerful 2010 Mac Pro Quad Core which is totally incapable of jumping on to the same Wifi Connection. Even if both devices are right next to one another.
Of course, I have the usual 'Self Assigned IP' problem, and like you, I have trawled the internet endlessly following all sorts of guides, all sorts of DHCP Renewal methods and all sorts of manual methods and all sorts of Firewall settings etc etc etc.
In the end up, none of it ever works. Except for the very rare occasionally day I'll turn the Mac Pro on and it will have randomly decided to connect to the WIFI connection and work fine.
I gave up trying to figure it out. I can no longer connect to the internet so my Mac Pro has to live with no important updates etc. Not very future proof at all and extremely frustrating.
I run a busy recording studio so its solely the fault of this problem that I struggle to be as competitive as my rival studios as I can not preform the simple Audio software updates everyone else can. Brilliant.
INFURIATING.

Self Assigned IP Address redux

I am getting the "Self Assigned IP Address" in my Airport connection and I can't troubleshoot the problem.
Here's my setup and what I have been looking to accomplish..
I have an iMac G5 with a built-in Airport Extreme card running Leopard 10.5.3. I have created a network to provide my AppleTV and my work laptop with access to the internet. I've turned Internet sharing on, and have security set to a the WEP 128 key..
Recently I had to exchange my AppleTV for a new one, and during the 2 weeks I was without AppleTV - something has changed (and as I think through the issue, I'm not certain about when the last time I played youtube or purchased content - maybe the new appleTV doesn't have anything to do with it, and it was a software upgrade), as I am no longer able to access YouTube content or the iTunes Music store to authorize my purchased content or to purchase new music/movies. However, I am able to watch movie trailers, and preview songs. It connects to the network fine, shows a strong signal, but something isn't quite right.
I've performed about every known solution to the AppleTV problem, and have an open post over in the AppleTV area, but in tracking down my issue, I see that my Airport connection is showing that it has a "self-assigned IP Address" and my not be able to connect to the internet. My thoughs are that if i get the self-assigned IP address problem solved, I'll solve the ITMS/YouTube issue on the AppleTV.
My internet connection is via Verizon DSL, with a DSL modem, connected directly to my iMac with an ethernet cable. (no external router/firewall)
I find it interesting that I can watch trailers, preview music from ITMS with the 'Self-assigned IP' but not access ITMS for purchases, etc.
I do not have any expertise in networking and for the most part am just following what posts I've seen out there suggest to try - trashing the com.apple.airport.pref's - restarting in 'Safe' mode, etc. Rebuilding the network connections from scratch, etc. Repairing Keychain access, disabling the built in firewall, etc. Just can't get by this issue.
Anyone with any thoughts?

hey guys...I found the problem...it helped me very much just try to change the wireless mode from 11bgn mixed to 11bg mixed...do this from router settings . . .I guess this will help you

Can't connect to internet..self assigned ip address problem with DSL Modem

I've run into this before, without resolution, and now again on a friend's iMac. Time to ask around...
Basically, everything appears to be assigned and configured perfectly, but the network status always shows, "...you have a self assigned IP address and may not be able to connect to the internet". Sure can't connect to the net when it says that.
I've gone thru the procedure advise before that details the sequence of events needed to insure the modem resets and recognizes the Mac and it's incoming DSL (sbcglobal) signal. The order of network priority is set properly by dragging built in ethernet to the top of the list. Modem was powered down, plugged in, and then connected to the Mac, but no solution. Any ideas? thanks

This continues to be a mystery. I've had my powerbook on several networks, and connection has, most of the time, been an automatic process. Additionally, I've installed new systems for people with the same isp, and all has been well. So easy is the process, it's never been an issue. However, following explicit procedural instructions (including powering the Mac down), has proven unsuccessful on 2 different occasions.
There is little help with the isp support in India, which is where the call routes too.
The only thing I have not done is to swap out the cable at one of the locations, but the other location, which has the same issue, works fine on the iMac there. Only when I connect my Powerbook to the modem, does the "...self assigned ip address...not be able to connect to the internet" appear.
I just keep thinking there has got to be a small detail that is being overlooked.

Airport and a self-assigned IP address - can't access wireless net

I have a strange issue with Airport picking up a wireless network.
I'm not in my usual location using my MacBook Pro.
There is a wireless network here.
Airport sees it, and asks for the password (provided to me).
Airport looks connected, but, I see the message: "Airport has a self-assigned IP Address and may not be able to connect to the internet".
And in fact, it cannot. I've run through the diagnostics routine twice, and no go.
How do I get Airport to accept an IP address from this wireless configuration?

I am having a nearly identical problem. The solution provided did not work for me.
We have two MacBook laptops, one is mine and the other my wife's. My laptop still works fine. The AirPort communicates well with the wireless router. My wife's laptop just started having this problem about a week ago. The latest Airport software updates helped, but did not solve.
The problem is that I now have to go into network diagnostics everytime to connect my wife's laptop to the wireless router. I have to re-enter the password to the router each time. Once I enter the password, it finds the IP address and connects everything properly. I checked the keychain password and it is there, so I don't know why it keeps losing the IP address.
One thing that I did preceded this problem. I changed my router password to WEP. If anyone knows if this could cause the problem, let me know.

"Self Assigned IP Address" - connected, no internet access

I have a Netgear WGT624 v2 wireless router that is hard wired to one iMac while other laptops have wireless access to it. This set-up has been working fine for awhile - but now the laptops are saying that they are connected via the router, but they've created "self assigned IP addresses."
I called Netgear tech support and they had no answers, all they would do was make sure that the laptops were able to find the router, which they can, they just can't connect. Why are they creating their own IP addresses?
Is there a solution to this problem? What causes it?

Check your setup in the router for wireless clients. Log on to it and make sure that DHCP is enabled if you use it and you are in infrastructure mode ( wired/wireless combo ). Also, if the clients are B or G mode, make sure the router is set correctly to that mode or mixed. If the IP addresses are 169.254.xxx.xxx then they aren't really getting an address ( this may only happen in Windows, don't remember). If you don't use MAC address filtering for security, a blank list could have been turned on........ anyways, go through all your router configurations for wireless and make sure they are the same or close to the settings for the wired Mac that works. Probably just a checkmark somewhere that isn't supposed to be. Has anyone been in there messing with it? Good luck.
Michael
MBP 2.16 & 20" iMac Core Duo Mac OS X (10.4.5) Large Windows network & Canon DSLRs

How do I solve a self-assigned IP address?

Hello all,
Here is the situation: I am currently on the road with a MacBook Pro running 10.6.8 and an iPhone 4 running iOS 5.0.1.
The hotel where I am staying doesn't have WiFi, but does have ethernet cables in all the rooms. My laptop is therefore hooked up to the internet through its ethernet port. No problem there.
Way back when, I used to be able to share that internet connection with my dataless iPhone (I don't use data while travelling internationally as I'm not made of money), but going to System Pref>Sharing and sharing the internet connection, which is incoming through the ethernet port, through the AirPort. One day, it stopped working, reporting that the AirPort has a self-assigned IP address (in the dreaded 169.254.xxx.xxx range) and will not be able to connect to the internet. Hence my iPhone won't get its internet feed. I have looked all over for a solution and haven't been able to find one where the problem was similar to this one; those posts I found dealt with computers trying to hop onto the net directly, not with sharing a net feed.
I would be extremely grateful for a solution.
Many thanks!
Carl

Power cycle your router.

One SOLUTION for "self assigned IP address"

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