For the 13th year, the PostgreSQL Project is participating in Google Summer of Code (GSoC). This project is a great opportunity to let students learn about Open Source projects, and help them deliver new features. It is also a chance to engage the students beyond just one summer, and grow them into active contributors.
If you download the Greenplum Community Edition (GP CE) from the Greenplum website and if you want to connect tools like pgAdminIII from your host machine to the database inside the virtual machine, you have to disable the firewall. The CE is installed on CentOS and by default the firewall is enabled and blocks connections from outside to most ports.
Here are the steps which are required to disable the firewall: