doc.FAQ.ISuspectThatMyUserIsExperiencingPortOrNetworkingProblemsWhatDoIDo Do firewall restrictions prevent a user from downloading our components? Test both HTTP and FTP links. Provide a DAV link to the file. Attempt to FTP the file to a user site. Attempt to email components to the user. Provide files to user via CD. (Requires Manager Approval.) Do networking problems prevent transfer of a downloaded file to the target machine? Urge the user to seek assistance from the on-site network administrator. Tell the user to transfer the file(s) via CD or disk. Do port problems prevent Multi-tier users from starting their Request Brokers? Log in 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 installation. Locate the [Protocol TCP] section. Locate the Listen parameter. (Release 1.x and 3.x users locate PortLow .) Close oplrqb.ini. Run netstat -a. If Listen or PortLow is occupied, assign a new port in oplrqb.ini. If Listen or PortLow is not occupied, this may not be a port problem. Do users not know what ports to pass in data source names or connect strings? Inform users that the only OpenLink-specific ports appear in the [Protocol TCP] section of the server component's .../openlink/bin/oplrqb.ini file. Any other port would be gleaned from database-related configuration files or utilities. Do firewalls prevent Multi-Tier clients from contacting Multi-Tier Request Brokers? 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 installation. Locate the [Protocol TCP] section. For example: [Protocol TCP] PingWatchdog = No PingInterval = 600 ;IPAddress = 127.0.0.1 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. (Release 1.x and 3.x do not have Listen.) Close oplrqb.ini. Open the Listen and PortLow - PortHigh TCP ports on the firewall. Open UDP port 60001 -- in addition to those above -- to accommodate Release 1.x and Release 3.x drivers. Do Multi-Tier port settings restrict the number of concurrent connections? 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 installation. Locate the [Protocol TCP] section. For example: [Protocol TCP] PingWatchdog = No PingInterval = 600 ;IPAddress = 127.0.0.1 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. Save changes and exit the file. Restart or reinitialize the Request Broker and test.