Running a Selenium 2 RemoteWebDriver server using java -jar selenium-server-standalone-2.15.0.jar.
I always get the error:
HTTP ERROR: 403
Forbidden for Proxy
RequestURI=/session
when connecting to it using the python WebDriver client:
import selenium.webdriver as webdriver
webdriver.Remote('http://localhost:4444', {})
or any other various RemoteWebDriver client I could find.
The solution was simple: Use the pathname
/wd/hubi.e.