Our videos are streamed from several HTTP servers; normally this works fine with no problems, but we have had issues with corporate firewalls being configured to block all streaming video (mostly to prevent Youtube use in work). If you need to whitelist our servers on your firewall, the servers are:
All servers stream video on port 80, the HTTP port, and throttle the streaming rate according to the available bandwidth, serving a lower quality version of the video if needed.
In addition, www.caranddriving.com 220.127.116.11 serves images, and occasionally flash videos.
We do change these IP addresses from time to time, so if your network stops working and you've had to put whitelists on your firewall, please check back here to ensure that the IP addresses haven't changed.