Security groups cannot currently be edited from 

https://dashboard.rc.nectar.org.au/project/access_and_security/

We are working to resolve this issue.

Meanwhile. two workarounds

are available. You can either use the beta version of the dashboard to make these changes, by visiting

https://dashboard-next.rc.nectar.org.au/project/access_and_security/

or you can use the neutron commandline client. Instructions for the command line client are available at

http://docs.openstack.org/developer/python-neutronclient/usage/cli.html.