On 20 July 2010 10:07, David King <linux...@avoura.com> wrote: > > > Colin Law wrote: > > Does it work for another user on the PC? If you have not other user > > add one using System, Administration, Users and Groups. A second user > > is often useful for testing. > > > > Colin > > > > > > > Although my Ubuntu 9.04 has been working okay with accessing the > Internet recently, this morning when I booted into it, again I had no > internet access. I could not access the router, although when I looked > at the Network Connection, it showed an IP address as well as that of > the router, suggesting that there was no problem connecting to the > router or for the router to connect to the Internet. > > So I set up a new account on Ubuntu 9.04, and logged into that. Straight > away that user had internet access with nothing blocked, and I could > access the router and webpages okay in Firefox. > > So I then switched user back to my own normal user account and then had > access to the Internet okay. > > So what else should I be looking for to diagnose why my main user > account cannot access the Internet sometimes? > > > The thing that immediately came to mind when you first posted this was that something might be setting the HTTP_PROXY environment variable. Some applications that access the Internet will acknowledge this and others don't, and if it's set to a non-existent or unreachable address, some connectivity will fail and some will work. I found, for example, for reasons too complex to get into now, that Google Earth will use it and that Firefox uses its own setting, so if it happens again, open a terminal and type 'env | grep HTTP_PROXY' and see if there's anything set for it.
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