Airport Extreme and Windows 7. Please help!

Question

I am trying to hook up a PC, running Windows 7, to our airport via wireless. It will connect to the network but then it says No Internet access. The PC works on a normal router (non-apple) but will not connect to internet via airport. I have searched and searched but I cannot figure this out.
Can someone please help? This is the 3rd PC i have tried to connect and none have worked.

Answer 1

OK, sound like yours is setup very similar to mine, which means there is another device controlling the IP address allocation (DHCP) and possibly the internet access.
Where the Broadband phone line enters the building there should be a modem and or router, depending on the type of line you have. I have an ADSL Router which combines both and it is that, that is controlling everything. So you will probably need to access that too, its IP address will usually be the first IP address.
Now your IP address will be a variation of 3 main private ones that is the same on every internal network. So as the IP addresses are handled by this other device we still don't know if you are using DHCP which is what allocates IP addresses automatically. Again at my work location DHCP is disabled deliberately to help prevent unauthorised access.
Have you access o a working Mac and are you able to see if the IP address is set manually or automatically ?
If it is manually you will need to setup the PC manually too. This is a pain if you are going to have regular requests to connect PC's plus you will need to ensure that you don't use an address you've allocated to someone else or that is reserved for DHCP or anything else.
Now you can do this yourself but this is looking increasingly like you need a local network expert, as it is so much easier when you can actually see the machines.
My address range is 192.168.1.x with my Gateway ending in .1 and my APEx ending in .100 this is the most common one, but there is also 10.0.0.x and another I think start 169 ?? but I've never used that one and you only need to keep this info out of the reach of students and other undesirables within range of the APEx !
Before going any further, when a PC tries to connect what is the IP address it is using, normally DHCP is enabled and it will try to get the address automatically if it is successful it will be in the same range as you are are using, if not it will probably start 169 and then it won't work properly.
You could just try setting the IP address manually on the PC but you will have to get all the info correct.
Here is an example based on mine....
IP - 192.168.1.(1 to 254) but not one that is already in use. Try 99
SUB - 255.255.255.0
GATEWAY - 192.168.1.1 (this is the address of my ADSL Router)
DNS 1 - 192.168.1.1 (same as gateway unless yours if different)
DNS 2 - (leave blank or enter what is on yours)
Now on the APEx there are some option I have not played with that you might want to check out, under Access Control is MAC Address access control enabled, if it is nothing new can connect while that is enabled, but I think you said they are connecting OK. Also there is also something called Guest account, whereby you can grant someone limited access for say 24hrs, again I have not used that but you could try it. There is an option to allow the next request for connection to connect, so might be worth trying.
Hope that helps.