Quote Originally Posted by Harry Kuhman
First of all, it sounds like your router may have a serious problem. It should not reassign the same IP address.

Second, are you absolutely sure that you are connecting to your router and not another router in the neighborhood?

Third, what make and model of router is this?
Sorry for the late reply. Got too much stuff to do at work.

1st Question: I absolutely with you Harry.
2nd Question: I pretty sure all the wireless pc is connected to my network as I can see it connects to the right SSID.
3rd Question: My router is a "Network Everywhere" model NWR04B. (I was told it is the same manufacture for the LinkSys products)

I did a detail reading on my router's manual and found that I can set the DHCP to return a range of IP address.

So here is what I did to avoid the problem:
1. Set the DHCP server to return the range of IP address starts from 192.168.1.100
2. Set both Windows XP pcs using static IP address: 192.168.1.90 and 91
3. The knoppix machine is using the DHCP dynamic IP addressing mode.

Now everything seems working OK. But I still do know what make the duplication of the DHCP IP address mode happens.

Also I encounter another problem too. I tried to make the knoppix machine to use static IP address and I did the following:

1. boot from the cd 4.0.2 with cheat code: knoppix nodhcp
2. from the console enter: sudo ifconfig eth0 192.168.1.92
3. from the console enter: sudo route add -net default gw 192.168.1.1 netmask 0.0.0.0 dev eth0

It all run successfully, I did a checking with the ifconfig and route command and find that it seems the setting is ok. The knoppix machine is identified locally and working OK. (i.e. can connect from the Windows XP machine via Putty and ftp)

But when I try to access any web page, (i.e. www.yahoo.com, www.hotmail.com) I got an error saying "Host not found".

I think I must be missing something on my setup steps. Anyone can help?

Rgds,
Chip