2.2. Enabling IP Ports
Before deploying a Red Hat Cluster, you must enable certain IP ports on the cluster nodes and on computers that run luci (the Conga user interface server). The following sections specify the IP ports to be enabled and provide examples of
iptables rules for enabling the ports:
2.2.1. Enabling IP Ports on Cluster Nodes
To allow Red Hat Cluster nodes to communicate with each other, you must enable the IP ports assigned to certain Red Hat Cluster components. Table 2.1, “Enabled IP Ports on Red Hat Cluster Nodes” lists the IP port numbers, their respective protocols, the components to which the port numbers are assigned, and references to
iptables rule examples. At each cluster node, enable IP ports according to Table 2.1, “Enabled IP Ports on Red Hat Cluster Nodes”. (All examples are in Section 2.2.3, “Examples of iptables Rules”.)
| IP Port Number | Protocol | Component | Reference to Example of iptables Rules |
|---|---|---|---|
| 6809 | UDP | cman (Cluster Manager), for use in clusters with Distributed Lock Manager (DLM) selected | Example 2.1, “Port 6809: cman” |
| 11111 | TCP | ricci (part of Conga remote agent) | Example 2.3, “Port 11111: ricci (Cluster Node and Computer Running luci)” |
| 14567 | TCP | gnbd (Global Network Block Device) | Example 2.4, “Port 14567: gnbd” |
| 16851 | TCP | modclusterd (part of Conga remote agent) | Example 2.5, “Port 16851: modclusterd” |
| 21064 | TCP | dlm (Distributed Lock Manager), for use in clusters with Distributed Lock Manager (DLM) selected | Example 2.6, “Port 21064: dlm” |
| 40040, 40042, 41040 | TCP | lock_gulmd (GULM daemon), for use in clusters with Grand Unified Lock Manager (GULM) selected | Example 2.7, “Ports 40040, 40042, 41040: lock_gulmd” |
| 41966, 41967, 41968, 41969 | TCP | rgmanager (high-availability service management) | Example 2.8, “Ports 41966, 41967, 41968, 41969: rgmanager” |
| 50006, 50008, 50009 | TCP | ccsd (Cluster Configuration System daemon) | Example 2.9, “Ports 50006, 50008, 50009: ccsd (TCP)” |
| 50007 | UDP | ccsd (Cluster Configuration System daemon) | Example 2.10, “Port 50007: ccsd (UDP)” |
