install mpich2 on Fedora18 or Pidora which is RaspberryPi OS.

#yum install mpich2 mpich2-devel

#firewall-cmd --direct --add-rule ipv4 filter INPUT 0 -s 192.168.1.0/24 -p all -j ACCEPT
#firewall-cmd --direct --add-rule ipv4 filter INPUT 9 -s 0.0.0.0/0 -p all -j DROP