Kindly be informed that currently there is an on-going issue with regards to problem in accessing to some of the websites within NUS and our engineers are already looking into this matter.
As a temporary workaround solution, you can enable the proxy server settings to your web browser to allow you to access the websites. Open your IE and go to Tools>Internet Options>Connection and click on LAN Settings. Enter the proxy server address as veron.nus.edu.sg and the port as 3128.
You should be able to view those websites without any issue with the proxy setting configured. Once the web access problem is resolved, you can remove the proxy settings.
You may try to periodically uncheck the proxy server setting to test it out.
