The Gateway Configuration
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The first tab of the Pigeon Gateway Configuration module is the Gateway configuration.

gateway_config_gateway

Listening on TCP Port: This is the TCP Port on which the Pigeon Server will connect to the Pigeon Gateway. The default value is 3102. If you change this value, you will need to modify all your Pigeon Server's configurations to reflect this change. You can choose any value between 1024 and 65535. Change this value only if there is a conflict with another application.

Data retention days: When a Pigeon Server sends data on the assigned TCP port, this information is saved into its own database then sent to all connected Pigeon Servers. The information about which server has received the data is also recorded in the database. If a Pigeon Server goes down, the data will be sent to it when it reconnects. The default value is 7 days. You can choose any value between 1 and 365.

Intercept Clients v3.x: When this option is checked, the Pigeon Gateway will listen on TCP port 3103 for any incoming Pigeon Clients version 3.x. When a client requests a connection, the Pigeon Gateway will route this client to the server defined for its IP address. If no server is defined for its IP address, the connection will be rejected. The client's watchdog will wake up and try to connect to the server every minute.

NOTES:  
1.   If the Intercept Clients v3.x option is checked, you should stop any Pigeon Server on this machine. Having both modules listening on the same port will produce unpredictable results.  
2.   When the Intercept Clients v3.x option is checked, you cannot select port 3103 on the Listening on TCP Port option.  
 

Save Changes: If any of these 3 fields have been changed, the button Save changes will be enabled. Clicking this button will save the values in the Windows registry database. If the Pigeon Gateway service is running, it will immediately read the newly saved values:
·If the Listening on TCP Port number has changed, the Pigeon Gateway will close all existing connections and start listening on the new port number:  
·If the Intercept Clients v3.x option has changed and is now checked, it will start listening on TCP port 3103 for Pigeon Clients 3.x connections. If the option has changed and is now unchecked, it will close the listening process.  

Revert changes: If any of these 3 fields has been changed, the button Revert changes will be enabled. Clicking this button will restore the values back to their original content (from the last save).