Mac OSX Maverick Browsing problem

Hi all,

In the last two weeks a very strange problem is happening with mu MBP.

It stop browsing in any browser (FF, Chrome or Safari) but any other network function continues working such as ping, torrent, ssh, telnet, etc

The only way to "fix" the problem is rebooting the computer, what is annoying.

Looks like something is blocking the ports 80 and 443 or the applications...

GMAIL is the only website that works using Chrome.

A virtual machine running on VMWare works fine as well but I can't access even the Apache at the virtual machine using the Mac OSX.

Any thoughts?

Thanks