This is where the heavy lifting happens. FileCatalyst sends data via UDP to avoid the "latency bottleneck" of TCP acknowledgment packets.

| Connection Direction | Protocol | Port(s) | Purpose | | :--- | :--- | :--- | :--- | | | TCP | 11001 (default) | Initial control connection (authentication, commands). | | Client → Server | UDP | 11001 (default) | High-speed data transfer. This is the proprietary FASP-like UDP protocol. | | Server → Client | UDP | Dynamic (high ports) | Return UDP traffic. The server sends data from a dynamically allocated high port (typically 20000-65535) back to the client's source port. |

To get FileCatalyst Direct running through a firewall, you must open specific ports. While these can be customized in the server settings, the defaults are as follows: 1. The Control Channel (TCP Port 21)

FileCatalyst and firewall integration requires careful configuration to ensure secure and reliable file transfers. By understanding FileCatalyst's interaction with firewalls and implementing the recommended configurations, organizations can ensure seamless operation and maintain network security. If you're experiencing issues with FileCatalyst and firewall integration, consult the documentation for your specific firewall solution or contact FileCatalyst support for assistance.

Filecatalyst Firewall !full! -

This is where the heavy lifting happens. FileCatalyst sends data via UDP to avoid the "latency bottleneck" of TCP acknowledgment packets.

| Connection Direction | Protocol | Port(s) | Purpose | | :--- | :--- | :--- | :--- | | | TCP | 11001 (default) | Initial control connection (authentication, commands). | | Client → Server | UDP | 11001 (default) | High-speed data transfer. This is the proprietary FASP-like UDP protocol. | | Server → Client | UDP | Dynamic (high ports) | Return UDP traffic. The server sends data from a dynamically allocated high port (typically 20000-65535) back to the client's source port. | filecatalyst firewall

To get FileCatalyst Direct running through a firewall, you must open specific ports. While these can be customized in the server settings, the defaults are as follows: 1. The Control Channel (TCP Port 21) This is where the heavy lifting happens

FileCatalyst and firewall integration requires careful configuration to ensure secure and reliable file transfers. By understanding FileCatalyst's interaction with firewalls and implementing the recommended configurations, organizations can ensure seamless operation and maintain network security. If you're experiencing issues with FileCatalyst and firewall integration, consult the documentation for your specific firewall solution or contact FileCatalyst support for assistance. | | Client → Server | UDP |