The requested domain name is not configured for any web site:
http://connect.nmmu.ac.za/Blogs/Adventures-of-a-Blended-Learning-Techie/March-2012/SharePoint-2010--Collaborate,-network,-teach
If you're an administrator of this site, you need to go to
Site Manager -> Sites
and use the following domain name either in the Site properties or add a new domain alias:
connect.nmmu.ac.za