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Therefore the following resources and documentatios documents contain a lot of important information about configuring Fedora 4's underlying projects.

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See this example on the RedHat pages

Firewall Notes

If your cluster has a firewall between nodes, you'll need to open the following ports:

• UDP multicast source address and port for JGroups messaging

  Example:  if your nodes are on the 192.168.47.x network, then this would be your iptables rule:

  Code Block
  title UDP multicast firewall rule
  -A INPUT -m pkttype --pkt-type multicast -s 192.168.47.0/24 -j ACCEPT

• TCP replication: TCP bind address and port (source)
  Example:    if your nodes are on the 192.168.47.x network, and the TCP bind_port is 7800, then this would be your iptables rule:

  Code Block
  title TCP replication firewall rule
  -A INPUT -m state --state NEW -m tcp -p tcp -s 192.168.47.0/24 --dport 7800 -j ACCEPT

• UDP replication:  UDP bind address and port (source)
  Example:    if your nodes are on the 192.168.47.x network, and the UDP bind_port is 47788, then this would be your iptables rule:
  
  

  Code Block
  title UDP replication firewall rule
  -A INPUT -m state --state NEW -m udp -p udp -s 192.168.47.0/24 --dport 47788 -j ACCEPT

Simple Shell script to coordinate a cluster

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