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”.)

Table 2.1. Enabled IP Ports on Red Hat Cluster Nodes

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)”