[mod_cluster-issues] [JBoss JIRA] Created: (MODCLUSTER-154) Update docs to include basic iptables rules to allow mod_cluster multicast traffic

[Samuel Mendenhall (JIRA)]

Update docs to include basic iptables rules to allow mod_cluster multicast traffic
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                 Key: MODCLUSTER-154
                 URL: https://jira.jboss.org/jira/browse/MODCLUSTER-154
             Project: mod_cluster
          Issue Type: Task
    Affects Versions: 1.1.0.CR1, 1.0.3.GA
            Reporter: Samuel Mendenhall
            Assignee: Jean-Frederic Clere
            Priority: Minor
             Fix For: 1.0.4.GA, 1.1.0.CR3


By default RHEL/Fedora iptables rules blocks multicast traffic.  At least on a single JBoss node with Apache and JBoss on the same machine the following iptables rule allows multicast traffic.  If this rule isn't in place http://localhost/mod_cluster-manager will not show any nodes as multicast is blocked and Apache<->JBoss won't communicate

/sbin/iptables -I INPUT 5 -p udp -d 224.0.1.0/24 -j ACCEPT
/etc/init.d/iptables save

It may also be helpful to note the iptables rules when running in a cluster also as seen here: http://www.redhat.com/docs/en-US/JBoss_Enterprise_Application_Platform/5.0.1/html/Seam_Reference_Guide/ClusteringAndEJBPassivation.html#clustering.deployment

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