Slow Name Resolution - I guess

[Samuel Bächler <linux@boeser.ch>]

Hoi Everyone

Consider I want to see www.foo.bar: I open my browser
and type www.foo.bar.
Now, my problem begins:
Iceweasel says "Looking up www.foo.bar..."
In recent days this "Looking up" process began to take quite
a lot of time (more than 15 seconds).
Now, I suppose that something is going wrong with the name
resolution on my laptop.
I also tested the "Looking-up" process at another place meaning that
I was using another cable-connection. The behavior was the
same as at home. Therefore, I conclude that something must
be wrong with the configuration of my laptop.

What shall I check?

Regards

Sam