Woohooo www.interactivebrokers.com works again 



It likely never was and will not be in the future. Many big site aren't pingable. Ignoring (dropping) ping packets is an easy way to deal with a whole category of ICMP denial of service attacks. Makes it harder to troubleshoot problems like this tho.
Or if want to make sure it isnt some sort of browser/proxy setting causing the problem you can do what I always use when troubleshooting - telnet on port 80, takes the whole browser issue out of the equation.Quote from kiwi_trader:
The test is to connect with your browser.