Another device on the network is using your computer IP address.. Every time my macbook pro and my Imac are on line at the same time i get this message any help..??

Under normal circumstances, the Airport's DHCP server will ensure not to issue duplicate IP addresses to its associated clients. I can think of two reasons for this to fail. Either some illicit user has manually appropriated of the IP address and is conflicting with your Mac and the DHCP server, or maybe there is a duplicate DHCP client ID in both computers. To remedy this last issue, open Network in System Preferences, click on the Wi-Fi service on the left to select, click on Advanced, click on TCP/IP and ensure that the DHCP client ID textbox is blank on both, erase as needed. Click OK and Apply (if you made any changes).

sirioluce wrote:

I have tried to turn off my modem and after that i turned on each machine individually it worked for a while giving my macbook pro and my Imac different IP address.. but the problem came back again and im here with 2 similar IP addresses on each machine and once that happen i lose the internet on both of them.. and I get an exclamation mark on my Airoport symbol.

how can i change my IP address and where can i get a new 1.. should i just make it up..??

TY 🙂

What router are you using?

That sounds like your modem, is it a router as well or do you have a seperate router (please give the full model number of the fastweb)

OK, you have a modem combined with a 4 port switch, you need to ensure that the Fastweb is handing out addresses using DHCP and that your devices are requesting addresses from the DHCP server (the fastweb) start by reading the fastweb manual for information regarding DHCP server settings.