I am having difficulty accessing the site
Most organisations have "firewalls" to protect their networks and their computers. A firewall is a secure gateway through which all communication passes and which protects the organisation's computers from unauthorised access by filtering the information getting in and out. Depending on how the firewall is set up, access to another secure server may be denied.
If you are having problems accessing the site check with your IT department to see if a firewall is in place that may be affecting access to our site and how this has been set up.