Self assigned ip address-Could someone help me?

There are two Powerbooks in my house which connects wirelessly to the internet and an airport express that joins the existing wireless connection.
When I'am using mine, I can connect without any problem, but when my girlfriend uses her mac we both get the self-assigned ip address. The only way to connect after that is by reseting the router.
This is what i did in both computers after I read some posts here (BUT THE PROBLEM CONTINUES) and I don't know what else to do:
"....1. Reset Open Firmware. As you turn on the machine, press & hold CmdOption+OF until you get a screen that says "Welcome to Open Firmware". At the prompt, enter "reset-nvram" (without the quotes). Press return. Enter "reset-all". Press return and the machine will restart.
2. Open network preferences. In airport, go to advanced. Check the box that says disconnect the wireless network when logging out. (It seems incredible that it would work, but apparently it sometimes does.)
3. Restart in "Safe" mode (hold down "Shift" while restarting). Once in Safe mode simply restart again in regular mode. http://docs.info.apple.com/article.html?artnum=306879
4. Go into your keychain and find the password key for your network. If you connect to a WAP it will be the name of that WAP. Then in the key click on the access control tab. It probably shows selected applications. Change this to "Allow all applications to access this item"........"
Thanks.
K.

My wife's PB G4 was doing the same thing. Worked fine at the Apple Store but had issues on my all Apple network at home. After resetting the routers, recreating the network etc I finally disabled the firewall and all seems to be working.

Similar Messages

Help! How do i get rid of self-assigned IP address? Virgin Media & Ibook

Hey all, first time here. Hoping someone more knowledgeable than me (or the people at virgin!) can help.
I have home broadband from Virgin as of last night. Self-set up the modem (Cisco), Router (D-link) and connection to my Ibook, running Tiger 10.4.11
Router and modem seem to be working fine. Green lights all round. Plus last night i had an ethernet connection runnign fine and even got a wireless connection to the Ibook. All good.
This morning, twenty minutes of internet use, then bumped off. No connection.
Checked under System Preferences, Network, Airport and got a message saying Airport has 'a self assigned IP address and cannot connect to internet.'
I assume the problem therefore is with the Ibook talking to the router (sorry, not very technical so 'talking' is best i can do).
Tried switching off the firewall. Still no joy. Airport can see my router in the list, and even has it first in preferred networks to join list. I get a five bar signal when i select it from Airport but how do i rid the computer of the 'Self-assigned IP address' ?
Please help, it's driving me mad! Apple blame Virgin, Virgin blame Router manufacturer, Router manufacturer blame Apple. It's an endless circle of **** and call-centres!!!
Cheers!
Dan

Hi Dan, and a warm welcome to the forums!
"self-assigned IP address" simply means it's not getting an IP from the device responsible for handing out IPs, the Router in your instance.
Does Ethernet still work fine?
Go to System Preferences
Click Network
Highlight AirPort and click Configure...
Choose “By default, join: Preferred networks”
Select your access point and Remove your access point with the minus button.
Launch your keychain access in Utilities and delete your access point keychain entry.
Reboot
Go back to the “By default, join:” page and click the plus this time to add your access point. Enter the correct password, save, reboot.

Self-assigned IP address after downloading Mavericks

Last night I downloaded Mavericks on my MacBook Pro and everything was working fine. This afternoon however now System Preferences says I have a Self-Assigned IP. I haven't changed any preferences or done anything different so I'm really confused. I can't connect to Wi-Fi or to the Ethernet cable in my room. Any ideas on how to fix this issue?

I am now having this same issue. I have the issue with my ethernet connection. I am trying to share my internet connection between my MBP and my Xbox 360 and I have this pesky self-assigned ip address. PLEASE HELP!!

Help! Need to release self assigned IP address

This is my daughter's CPU...I tried the renew DHCP lease, restarted the iMac (G3, strawberry 266 MHz), cable modem & router and still the stupid static IP address still shows up! I called the ISP and tried many of these standard fixes, I even reinstalled OSX Panther and the problem remains. It used to work well until I put the CPU away for couple of months and when I tried to reconnect through Comcast, it did not. Please help me!!!! >_<<br>
iMac Intel Core Duo Mac OS X (10.3)

the only thing u can do for a self assigned ip address is power cycle the modem for 5 minutes, make sure the LED lights are out.. some modems have batteries... if that doesnt work try creating a new network location.. if that doesnt work then you will have to call your internet service provider
you could trying booting to your install disc and running network utility there but yes..

HT4628 My Mac Air OSX10.8.5 won't connect to the internet as it says it has a self assigned IP address and thus cannot connect to the internet. I can only connect to a network by manually typing in the configuration specs. Please help.

My mac air OSX10.8.5 won't connect to the internet. It says it has a 'self assigned IP address and therefore cannot connect to the internet'. Network diagnostics is unable to the solve the problem. It happened suddenly for no reason and now I cannot connect except by typing in the configuration settings manually. Please help me!

Use the Airport Utility or log into your wireless device via http and ensure the DHCP/NAT service is enabled. If accessing via HTTP, you will need to manually set an ip within your local subnet (eg: 192.168.0.x).

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. :-)

No Internet with Lion. Stay away until self-assigned IP addresses are fixed!

I have a TimeCapsule (802.11n 3rd gen) and four Macs. Until two months ago all was well and everyone could connect.
Two months ago the Apple apps on the MacBook Pro stopped connecting to the Internet on the TimeCapsule network (Mail and Safari would not connect, Firefox was fine). The MacBook Pro connects on all other networks. I travel a fair amount and the computer has connected fine at all networks tried. I have sinced updated to Lion (10.7.2) and the problem is the same. The error in System Preferences indicates that the computer has a self-assigned IP address and will not be able to access the Internet - but Firefox works, so we know that is not entirely the case.
Last week our desktop stopped being able to access the Internet using the TimeCapsule network. Problems the same as the MacBook but the desktop Mac is using Snow Leopard.
Our older laptop is using an earlier version of OSX and all is well. Out antique Mac laptop is also working well.
We also have a Verizon MiFi and all machines can access the Internet on that.
I have tried every "fix" I can find on the boards and through Google. Nothing works. From the looks of the boards, there are thousands of users with this problem and no answer from Apple.
I was much better off before I switched to Lion. In those days, I just used Firefox and looked at my iPad when I needed mail (and waited to sync at the office). But with Lion comes iCloud and an increased reliance on the App store, making internet connectivity through Apple apps is a must. Can someone from Apple help us fix this? Does anyone have any suggestions?

That is what I told Comcast, but they said since my
computer works "fine" in Safe-Boot,
Classic, and the other PC—then they
conclude there's no problem with their hardware and
that its not their problem; that its Apple's issue.
And nope I'm not connected wirelessly, it's through a
basic ethernet cable.
I don't know who to blame for this. Five years ago, this never happened, but it is common now. It affects both Macs and PCs, but as usual, people like Comcast will make an effort to fix a PC but throw up their hands with a Mac. Go figure.
So, what speed, duplex and adapter type numbers
should I put in?
I don't know for sure. Start with duplex. If it current says "auto", change it to "full". If that doesn't work, or if it already was "full", change it to "half". If still nothing, switch it back to "auto" and fiddle with all the 10/100 speed combinations. You may have to go back and try different duplex and speed combinations! It sounds harder than it is. Try changing the duplex and adapter settings from "auto" before changing the speed. I'm am on my work Dell right now (which needed the same fix BTW), so I can't give you very good step-by-step instructions.
The thing that troubles me is why is it that the
internet works fine in Safe-Boot and Classic, but not
Normal OS X mode?
No clue about that.

Can't get rid of self assigned IP address

Hello,
I have been trying to resolve this problem by myself for the last 4 days (by googling and reading forums) but nothing works so here I am.
I moved last Tuesday and everything worked fine until that day. Since I am in my new apartment, I can't connect to the Internet because of a self assigned IP address. Here is more info:
-I have a new modem since I moved (the apartment where I was living was furnished and had a modem already). However, I am using the same service provider and modem than the apartment I was subletting.
-I only have a modem (no router) and I use the Ethernet to connect.
-I am writing this message from a PC laptop which confirms that the modem is working fine and that the ethernet cable is fine, etc.
-I did many rounds of shutting down the computer, renew DHCP, unplugging the modem (from 1 minute to 10 hours) and plugging everything back.
-I called the ISP but they could not help (they just repeated the same instructions that I could find in the guide)...They have no idea how I can get rid of the self assigned IP address.
The problem is still the same, I can't get rid of the self assigned IP address (169.xxx).
Please help if you know other tricks to fix that issue...
Thanks a LOT in advance!!
Julie

Re 1) Setting up a new account won't solve the problem in itself but it will help narrow down the cause. The idea is this: the problem might be caused by something system-wide (e.g. a preference file in /Library/Preferences) or it might be caused by something that is specific to your account (e.g. a preference file in yourhome/Library/Preferences). If we knew which, we could target the troubleshooting appropriately. The easiest way to figure out which is to create a new user, log in as that user and see if the problem remains. If it does, it must be system-wide; if not, it is specific to your account.
Are you using any firewall software? If you are using Tiger's built-in firewall, how is it configured?
- cfr

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.

After reading hours on this forum still having self-assigned IP address

I just posted this below on another thread but it kinda is in the wrong subforum. This really is a networking problem:
I have spent about 3-4 hours today already (a Sunday after all) reading just about every thread I could find that mentions this problem (airport choosing a self-assigned IP address and thus not sharing the internet from ethernet connection with the iPhone) on this forum and elsewhere.
Power circuit interruption didn't work
rebooting, resetting, etc all not working
password deletion not working
moving it up or down not working
It worked fine now for months. My set up is a dsl router that connects the internet via ethernet to my iMac and then Airport is supposed to share it via Wifi so my iPhone can use it. As I said, that worked just fine for months now.
Yesterday I upgraded to snow leopard and am now on 10.6.4. It worked still fine yesterday!
Then I shut the system down.
This morning reboot and it just won't work anymore.
Any suggestion mentioned anywhere in this forum which a non-specialist like me understands does not work on my setup. I don't know where to go next or who to even ask for help!
It's so frustrating I obviously need this to work.
Because my iPhone has Daylite touch and needs the server setting to work to connect properly and sync. Daylite only syncs via wifi. That's my work!
Anymore ideas out there?
Message was edited by: BettinaH

Hi,
thanks for offering help! Really appreciated.
I'm not quite sure how that should help? I'm always a bit with resetting things. What can it potentially mess up that is working now? What settings will be affected? There is a list but I'm not sure if there are any current changes.
And in the list it doesn't seem to be directly linked to any networking info.
I've tried a save reboot now but while this is apparently a good idea in any event, it didn't help solve my problem. Still getting a self-assigned IP.
I wonder if getting a new router might solve the problem? Mine is somewhat old. The weird thing is though that it did work for a short while before it stopped doing so. So this can't really be then, can it?
Oh this is so frustrating. I must get my network running again.

ERROR: Wi-Fi has the self-assigned IP address

I'm having an issue with both my MacBook Pros at my home. If I try to connect to the Time Capsule after coming home from work, I receive the exclamation point in my wifi status icon and this error message in my network preferences pane:
"Wi-Fi has the self-assigned IP address 169.254.121.202 and will not be able to connect to the Internet."
The IP address is always different, but it always gives me a subnet mask of 255.255.0.0 and no Router IP.
This problem only seems to occur when both Macs are connecting and not connecting to the Time Capsule wifi. That is, when my girlfriend is out of town with her MBP gone, I never seem to have the issue.
It also seems like the first of our two to connect is the "winner" and will connect just fine, but the second one will not. If both computers are open and waiting to connect while we power cycle the Time Capsule, it will connect without any problem. If I then leave for work, come back home, try to connect, we have to start the same song and dance all over again.
I've tried just renewing the IP. I've tried restoring the factory settings on the Time Capsule.
I have a sneaking suspicion this may have something to do with the problem: My MBP is a 3rd generation copy of the data from hers. Hers was once my MBP, but we copied everything from it to a new MBP, which later was copied to a third MBP (the one I'm using now).
Thanks for any help anyone can provide!
Lou

I have a sneaking suspicion this may have something to do with the problem: My MBP is a 3rd generation copy of the data from hers. Hers was once my MBP, but we copied everything from it to a new MBP, which later was copied to a third MBP (the one I'm using now).
Thanks for any help anyone can provide!
Lou
That is interesting idea.. although the MAC address will be different I wonder if something in the GUID of the install being identical could cause issues..
Do both laptops have the same wireless cards?? Different models came with different cards. .these can not cooperate very well.. although I have seldom heard of them fighting in quite that way.
If you want to take the trouble.. a replacement hard drive and a new install of the OS.. see if it still happens.. how hard do you want to pursue it.
Check the log in the TC for when you try to connect.. and see if there is a reason given for not accepting you. Did you change the laptop network name.. ie they don't both have the same name do they.. it would not work if that was the case.

"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.

Unable to connect to internet as Self assigned IP address Since Aple repair

Right this is currently winding me up a treat and i am posting this via windows under bootcamp on my iMac as it is the only way i can connect to the internet.
Picked my iMac up from the Apple store in Bristol UK (i dont know if this is related or not) but the problem has only happened since the repair!
I cannot connect to the internet or any services that use internet access, and under network settings, under ethernet it says connected (light in green) but you may be unable to access internet and it is self assigning IP address. If i go into advanced and renew DHCP nothing changes, its still has an IP address beginning 16 not 192. as normal.
I have repaired permissions, reset the Pram restarted and nothing makes any difference! The router settings have not changed and are not at fault. i can access the internet from my Mac via bootcamp, or 2 other windows computers in the house and my iphone via wifi.
Note my Mac wont connect via wireless either as it also self assigns IP address.
I dont know what to try now and am getting fed up with this, as i never have problems that dont make sense with Macs i have been an avid user for 10 years, and am well clued up with them (normally).
Can anyone shed anylight? Its a 2007 2.4Ghz Intel Core2Gb Ram 320Gb HDD 265Mb Radion HD Pro. Running OS 10.5.7 (not updated to 10.5.8 as came out when it was in for repair and i havent been able to access since)
Thanks to anyone that can help!

Right i have just rebooted after reading another post and under Security>Firewall>Allow all incoming connections this seems to allow me access (well currently so anyway)
But surely this isnt right? IF i then go back to Set specific access its now ok, but i imagine it wont be if i rebooted with it like it was before.
Also i notice i now have the follwing under allow access (which werent there before it went to the Apple store for repair)
ntpd
nmblookup
krb5kdc
I dont know what they are? Could it be this?
Thanks

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.

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?

Self assigned ip address-Could someone help me?

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