Weird problem: Tearing my hair out here!! Unable to get an IP address from network

[Ollie Cromwell]

This is going to sound like a really silly problem but for the life of me I cannot work out what is going on.

I am trying to connect my MBP to a work windows network, it is a WPA encrypted network running via DHCP. there are no Access control lists blocking my machine but I cannot get the network to assign me an ip address. I can connect to the network but cannot do anything without an ip.

The weird thing is if I boot up Parralels and run Xp on my machine as a virtual machine XP gets assigned an ip address and I can get on the net etc, that is how I am typing this message in fact.

I am running 10.5.4

Also, a colleague has a Macbook running 10.5.2 and that connects no problem. I have checked all the settings on my machine and this macbook are the same.

My firewall is not the issue.

So I know I have the correct password and can connect but for some reason I cannot get an ip address. I have dhcp enabled on the MBP for this connection.

I have tried creating clean accounts and seeing if the issue is to do with my user setup and that does not make a difference.

Help!

I dont want to have to use my lovely Mac with Parrallels forever at work just to send email and check the web.

Any ideas?

 

[msjones]

I had a similar problem but with me LAN port on my MacBook. When I had connected to the network it would assign a IP like 243.124.0.23 and wouldnt let me do anything internet wise. I assigned a static IP and this seemed to work fine, but was no use as I use the MB on different wired networks.

What worked for me was to remove the network connection completely from the preferences pane, reboot and add a create a new one. This then got me an IP from the network I was trying to connect to.

You could try running the following from the terminal to set an IP for your device:

ifconfig en0 down
ifconfig en0 ***.***.***.*** up

Where ***.***.***.*** is enter a valid free IP from the network your connecting too. Also remember to replace the en0 with which ever device your using.

Hope this helps