"Wanna" ransomware outbreak. Please see this Sophos article sophos.com/kb/126733 for advice on how to protect your organization. Immediate action recommended.
GoToMeeting accesses HTTPS traffic on port 443 and randomly connects to an IP address in any of the IP address ranges described in http://www.citrixonline.com/iprange
This article shows you what to do when you cannot use GoToMeeting when the proxy is via Sophos Web Appliance.
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