PFSense is using an older and patched version of OpenBSD PF and as you said all ...

mben on Feb 3, 2013 | parent | context | favorite | on: OpenBSD removes Rails from the ports tree

PFSense is using an older and patched version of OpenBSD PF and as you said all the configuration is done using the gui. PF configuration in OpenBSD is very simple using the cli and following the official FAQ: http://www.openbsd.org/faq/pf/index.html