doc.FAQ.HowCanIDetermineWhichPortsTheMulti-TierRequestBrokerUses The Request Broker port appears in the Session Rules Book. This is the oplrqb.ini file that appears in the /bin sub-directory of the user's server components installation. Users need to open this file with a text editor and locate the following section:[Protocol TCP] PingWatchdog = No PingInterval = 600 Listen = 5000 PortLow = 5000 PortHigh = 5099 IPAddress = 127.0.0.1 OpenLink 's 4.x and 5.x Brokers listen on the port passed by the Listen parameter. OpenLink 's 1.x and 3.x Brokers listen on the initial port as specified by the PortLow parameter.