The RMI services use certain default ports. The default ports are left open on the firewall on cluster nodes and remote collector nodes.

Table 1. Default Ports for RMI Services

RMI Service

Default Port

RMI registry


Desktop message server


Broker message server


Certificate management server



Ports 3091 to 3094 ports are opened in firewall by vRealize Operations for Horizon. You need to manually open the ports 3099, 3100, and 3101 in vROps firewall. Ports 3092 to 3094 are used for backwards compatibility of vRealize Operations for Horizon 6.1.

Figure 1. Communication Ports Used with Broker Agent 6.0/6.1

Figure 2. Communication Ports Used with Broker Agent 6.2/6.2.1