Well site might have been compromised. Also issues with Spam/scam: https://www.mywot.com/en/scorecard/colocrossing.com?utm_source=addon&utm_content=popup-donuts
Also read this from article author Greg Carriger → http://gregcarriger.wordpress.com/2013/01/02/close-your-ports-batten-down-the-hatches/
See: http://www.rexswain.com/cgi-bin/httpview.cgi?url=http://www.host.colocrossing.com/&uag=MSIE+8.0+Trident&ref=http://www.google.com&aen=&req=GET&ver=1.1&fmt=AUTO

pol