[ubuntu-uk] Lost internet usage in Ubuntu 9.04

[David King]

In my Ubuntu 9.04 installation, just a few days ago, I lost my usage of 
the internet. I still had internet access. Firstly though, there was a 
problem with the router, so I tried a friend's router (both Netgear 
DG834) and the friend's one worked.

But in Ubuntu, I could not access any web pages or email. Skype works.

I tried using my netbook and that could access web pages okay.

So then I booted my main PC into the old installation that I kept there 
of Ubuntu 8.04, which I am using now. And in this the internet works 
just fine, I can access websites and download and send email.

But in Ubuntu 9.04, it seems like something is blocking my access. I do 
not recall installing anything new, although something may have been 
updated recently.

What is the likely cause of the Internet being blocked for websites and 
email (but not Skype)?


David King