doc.FAQ.DoUsersNeedToEmploySpecialConfigurationToOperateInAFirewalledEnvironment

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:

• Login to the machine that contains the Multi-Tier server components.
  
• Use a text editor to open the oplrqb.ini file that resides in the /bin sub-directory of the OpenLink? installation.
  
• Locate the [Protocol TCP] section. For example:
  
  

  
  [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 
  

  
  
  
• Make sure PortHigh? is uncommented and set. PortHigh? should equal PortLow? + the number of concurrent connections granted by the license + a few extra ports.
  
• Record the PortLow? - PortHigh? range.
  
• Record the Listen port value. ( OpenLink? 1.x and 3.x do not have Listen Port value.)
  
• Close oplrqb.ini.
  
• Open the Listen and PortLow? - PortHigh? TCP ports on the firewall.
  
• Open UDP port #60001--in addition to TCP PortLow? - PortHigh? --to accommodate 1.x and 3.x drivers.
  
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