Gateway info?

Hi,
I do have a server, and a hub. I did plug in a D-Link wireless router, in
the uplink of the hub, and want to connect to the server wireless. The server
has 10.0.0.2 and 255.255.255.0 and I di leave DHCP enabled on the hub, its IP
is 10.0.0.88.
The problem is that I have to manually put the dns 10.0.0.2 and the gateway
10.0.0.88 and 10.0.0.2 in order to see the server .
Then, when I do leave the office, I must remove those setting and leave all
on automatic in order to see any other wireless networks.
Is these any way to make it so I do not need to change this all the time?
Thank you,
Bogdan