Cisco Cloud Web Security (CWS) and OpenDNS both provide cloud based security services. CWS offers an HTTP/HTTPS proxy and OpenDNS provides security and visibility at the DNS resolution layer. I’ve been asked many times where both CWS and OpenDNS host their services as this can make a big impact in end user experience if the hosting location is far away from the user and could lead to high latency and a lousy experience.
CWS Proxy Location and Status Page: http://servicestatus.sco.cisco.com/status
OpenDNS Location and Status Page: https://www.opendns.com/data-center-locations/