MacBook Air :: Unable To Get IP Address From DHCP Server

Jan 9, 2011

I've recently purchased my first Mac (the new 13.3 inch air model). I seem to be having a bit of a problem with wireless networking, though. It seems that my Mac will reconnect to my wireless network perfectly after resuming from sleep mode just fine for a few days, but after those few days, it will mysteriously stop being able to get an IP address from the DHCP server (my wireless router). My PC is able to connect to the network just fine and always seems to be able to get a new address, but the Mac just loses the ability. I have found that the only way I can get the Mac to start grabbing an IP address from the router is by going into the router settings and changing the RIP mode to a value other than what it currently shows. I generally try to stay in RIP_2B mode, but I change it to some other random value whenever it stops connecting.

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OS X Server :: Unable To Use DHCP With Windows XP

Jun 29, 2005

I have a Mac OSX Server (10.4) connected to a switch with various Airport Express terminals around the place. Macs can connect to the network wirelessly (with 128 bit WEP) and WIRED totally fine... but when I try and connect a windows PC either using wireless or WIRED... an IP address isn't assigned. Windows just says "Limited or no connectivity"...

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OS X Server :: DHCP Grab My New Addresses

Mar 8, 2007

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Hardware :: Airport DHCP Fails To Get Address (Mac On Windows Network)?

Jun 7, 2006

I am a comitted Mac switcher trying to put my lovely new MacBook onto the office Windows network. I can connect to the office wireless network (WEP key etc) and the little radar Icon in the menu bar lights up. However, I cannot get the MacBook to obtain an IP address via DHCP. I just keep getting the default self assigned address (169.....).

However, when I connect to the network via a cable using the built in ethernet connector, I get the DHCP address just fine and everything works OK.Also, if I assign an IP address manually to the wireless card (checking it is a free address!) it accepts the settings but I cannot network, not even a basic ping of another machine on the local internal network (all our internal machines are using 10.0.0.x addresses and 255.255.255.0 sub net)The DHCP server is not in the wirless router but is a Windows server machine.This is driving me crazy. I have called Apple care and they just dont want to know because there is a Windows machine in the mix. I expected better from them,

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Lion Server NAT Destroying DHCP

Mar 29, 2012

I have recently purchased a USB Ethernet adapter so I can setup NAT on lion server that runs on a MacBook. I was shocked when it blew away my DHCP Config after I set up NAT, but I stuck with the scope it chose and added the correct DNS and gateway settings.Whenever I start DHCP now, the logs tell me the Config cannot be found, and it blows away all of my modifications to DHCP. On top of that, it won't hand out any addresses.If I stop DHCP, the system logs start telling me that "natpmpd" has started, and then it begins to hand out addresses. The problem with this is, I can't make any changes to the DHCP settings it uses, which means my clients are now getting the incorrect settings for the gateway and DNS.Also, when I modify the Scope with DHCP stopped, the logs tell me it cant update the subnet because it was not found.

Info:
MacBook, Mac OS X (10.7.3)

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Apr 14, 2012

I have setup OS X Lion server to act as the DHCP and DNS server for my local network. DHCP provides gateway address and the local DNS server address.   DNS is set to forward to my ISP DNS servers. 'A' records and 'PTR' records have been created for the various servers on the network and I am able to resolve the servers via dig by name and address. I can also access the internet without issue. DHCP is handing out IP addresses to Windows clients on the network but I am unable to locate the machines with DHCP addresses in DNS either by IP address or FQDN. The windows clients are able to access the internet without issue. Looking at the DNS log there does not appear to be anything recorded when the DHCP address is allocated. Is there something special that needs to be setup either in DHCP or DNS that will allow DHCP to record the host and address details in DNS?

Info:
Mac mini, Mac OS X (10.7.3)

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Mac OS X Lion Server :: Email Address Requires Host Name In Address Field

May 5, 2012

I'm trying to setup mail on Lion Sever (7.3). The only way I can get it to accept incoming mail is to specify the whole FQDN of the server in the address.For example the domain name is example.com and I have a user set up called john. Sending mail to john@server.example.com works.

But sending mail to john@example.com (which is what I want) returns an error:
554 554 5.7.1 <john@example.com>: Relay access denied (state 13).

For internal DNS, I have:
example.com - primary zonemail.expample.com - alias server.example.comserver.example.com - 192.168.1.2 [URL] - alias server.example.comMX record [URL]

I see references here to problems in mail on 7.3 but not this specific problem.

Info:
Mac OS X (10.7.3)

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May 1, 2012

[code]...

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OS X Server :: Server's Static IP Address Used By Another Device?

Nov 4, 2006

The following error comes up on the server's screen when I turn on the stations:"IP 10.37.102.21 is used by 00:0d:95:34:ee:60"Another device in my room or building is using the server's static IP address, this causes connectivity problems. I loose connection to the server. How do I find out what device is causing the problem and what do I do to resolve the issue? I am afraid it might be the CISCO 290XL switches used in the lab. I used ARD to check the Ethernet ID's and didn't come up with any workstation using that Ethernet ID or address.

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Sep 16, 2010

I have a MBP 15, the computer service of my company has pointed the server address of Mac Software Update to an internal server. It makes me cannot run Software Update at any place but my office. How can I change the address back to the server at [URL]?

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MacBook :: Using Wireless Shenanigans - Changing Back To Dhcp?

Jul 28, 2009

I recently got a white macbook while i am deployed in iraq, and our wireless signal here kinda blows, but at least it works. The only issue i have, seems to be that when i am connected to an access point, my macbook will randomly loose signal, and i end up having to go into the airport preferences, change from DHCP to BOOTp, and it will refresh, then come back on. If it looses signal again, i just change it back to DHCP, and then it works again.

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MacBook Pro :: Ethernet Dynamic DHCP Not Working On Mid-2010 With 10.7.3

May 14, 2012

Ever since I upgraded to 10.7.3, my mid-2010 cannot connect to to internet via Ethernet any more (wireless works fine). 

Basically, the Network utility GUI shows that a correct IP address has been assigned via DHCP, but I get no internet. 

If I now check the output of 'ifconfig', I see 'en0' having a local IP address assigned, i.e. 192.168.1.1 or similar. 

Seems like a software bug of some sort. Is it getting fixed in 10.7.4?

Info:
MacBook Pro, Mac OS X (10.7.3)

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Apr 4, 2012

What do I do if I receive a warning that another device is using my ip address on the macbook air?

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Jun 14, 2012

Is there a support email address for Apple?

Info:
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Jul 1, 2012

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Aug 12, 2007

Whenever I access my mac though my ip, local ip, 127.0.0.1, or the part of my domain linked to it, it usually will change the url to "Imac.local". How can I stop this?

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Dec 25, 2009

When trying to send an email on my mother's .mac account the following error appears. (Her account is biosophy@mac.com). - The message can't be sent because the server doesn't recognize "'biosophy@mac.com"-. I'm wondering if this is because there is an apostrophe after the first quotation mark. If so, how did it get there and how could it be removed?

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Dec 23, 2010

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Apr 16, 2012

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How can I do this?  I can't see any functionality to import in iClouds's Address Book. 

Do I have to have all of these server contacts "On My Mac" before iCloud will play ball? 

Info:
Mac OS X (10.7.3), Server 10.6, iMac 10.7

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Nov 2, 2010

Ok so I got my new MBA which I'm typing on right now and I love it (I need to update my sig...). I got my most important data over, but all I need are my address book contacts and iTunes playlists and song/movie/tv show ratings.

I copied my contacts from Application Support under Libraries. They are under Address Book in the folders "Metadata" and "Images". All the things in Metadata seem to be vCards, but when I double click one to open it, it just opens Address Book and nothing happens.

Also, when I transferred my iTunes stuff over, everything's perfect except I'm missing all my song and album ratings (488 albums and 4226 songs, all hand-rated). I'm also missing my playlists which are VERY important.

I have a backup of my whole hard drive from my MBP so I should be able to access these files, but does anyone know how or where? I copied over my whole music folder in Finder and I'm still missing my playlists and ratings

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Apr 10, 2012

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MacBook Air :: Not Auto Assigning IP Address, Won't Join Wifi?

Nov 18, 2008

It's the strangest thing, my wife's MBA (v1) will randomly refuse to connect to our home wifi network (cast by a 500GB Time Capsule). What seems to be happening is that it will connect then disconnect at bootup, it will say no preferred networks are available (when the home network has been configured!) and refuse to assign an IP address to the MBA. If I manually select the home network from the wifi icon, it will diplay security password, and then say this is invalid (when it is perfectly valid and the one used by my own MBP and iPhone)... this seems to happen only on our home network, any other works fine...My own MBP is fine. This is driving me crazy and I haven't found anything on the web on this.

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Apr 2, 2009

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Feb 13, 2012

When I try to save any address in the webmail addressbook, it says "An Error Occured while saving." It's probably a permissions problem with the addressbook database RoundCube uses, but I'll be darn if I can find it...

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Nov 26, 2010

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I used this feature to access my iPad through wifi, and had no intention of sharing an internet connection.
Now that I don't have an internet connection to share, my computer doesn't give any IP to my device, therefore my computer is unable to see my iPad on the network.

I also tried "Create network" feature of mac, but again, since IP addresses have been assigned by self, I'm not able to see my iPad on the network.

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Aug 29, 2009

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Apr 9, 2012

I have set up DNS with the following settings:

[code]...

I thought I may be able to use a wild card (url..) but Server Admin does not allow me to do that, some documentation reccomends against it and I dont think that would work for [url].

Info:Mac mini, Mac OS X (10.6.8)

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Jun 13, 2012

I have change some DNS-Entries on my lion server. (new hosttname). Ich checked everthing with "sudo changeip -checkhostname" and it seems to work fine. Also the OD. Now it sorted out that i have some Problems with my ical & adressbook server. How can i delete them an make the straight new, so that i got a new entry for the old

/principals/__uids__/94ACA880-F72E-4738-9F22-AE9607C1DF89/ 

At this moments a couple of time a day it complain that their is now connection for this Calender. Also the Adressbook refuse to save new entries. I both want to reset this ical & adressbook server part, but i can't find how to do it? 

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Oct 31, 2009

When I make connection with my router I do not have internet, but I go to my network options and I click TCP/IP and then "renew DHCP-lease". The "Router" number change from 192.168.2.1 to 192.168.3.1, and then my internet works. But if I have to restart my mac for some reason, it jumps right back to 192.168.2.1, and i have to click "renew DHCP-lease" again. I have this on my both Macs (MacBook unibody allu, and MacBook white and also on my iPhone).

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Mar 15, 2012

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Info:
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Jun 17, 2012

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Info:
MacBook Air

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May 8, 2008

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Oct 23, 2010

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Feb 7, 2012

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Info:
Multiple Systems, Mac OS X (10.7.2)

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