We are a group of academics at the Vrije Universiteit Amsterdam, NL and Max-Planck-Insitut für Informatik, DE who are interested in understanding whether the web servers in the Internet are configured to provide low-latency services to end users. One aspect of providing this service is to enable support for a mechanism called the “Explicit Congestion Notification (ECN).” We check whether a web server supports ECN by opening a TCP connection and closing it after establishing it. This transaction is indifferent from a regular end user opening the website and quickly closing the browser window or tab, because they are no longer interested in the content.
In case, you wish to exclude your server from our
tests, please email us at
ecn-study@googlegroups.com
with your domain name and
IP addresses. We will respond to all requests within 3 working days.