Single-Tier users should not need to open ports to accommodate the Single-Tier driver. However, ports may need to be opened to facilitate connections between the database native client and the database to which it connects.
Multi-Tier users need to take the following action, if a firewall surrounds the machine that contains the Multi-Tier server components:
[Protocol TCP] PingWatchdog = No ; Send check-alive packets PingInterval = 600 ; every <PingInterval> seconds ;IPAddress = 127.0.0.1 ; Overrules found interface address PortLow = 5000 PortHigh = 5020
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