The server is in HK while users are from different countries via browser. We can connect without problems weeks ago, it's just recently that users are reporting that they cannot connect when in the office. I also talked to the administrator of the server, but he told me he did not make any changes in the server and other users can connect just fine. The only change I made weeks ago is disable our first WAN (which has been terminated) and upgrading of the MX firmware. When Client VPN users type http://xxx.xxx.com/Citrix/XenApp/auth/login.aspx, the welcome page will show: But when at the office, it's stuck at http://xxx.xxx.com/Citrix/XenApp/auth/silentDetection.aspx and the page is blank. I also thought it may have been Windows update or antivirus, but since the user can connect via Client VPN at home using the same device, I doubted it.
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