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1.2. Configuring the iptables Firewall to Allow Cluster Components
Table 1.1, “Ports to Enable for High Availability Add-On” shows the ports to enable for the Red Hat High Availability Add-On.
| Port | When Required |
|---|---|
|
TCP 2224
|
Required on all nodes (needed by the
pcsd daemon)
|
|
TCP 3121
|
Required on all nodes if the cluster has any Pacemaker Remote nodes
|
|
TCP 21064
|
Required on all nodes if the cluster contains any resources requiring DLM (such as
clvm or GFS2)
|
|
UDP 5405
|
Required on all cluster nodes (needed by
corosync)
|
|
UDP 5404
|
Required on cluster nodes if
corosync is configured for multicast UDP
|
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