This feature is available with Artica 4.30x with unstable Service Pack 881 or Artica v4.40.
By default the Linux network stack is not configured for high speed large file transfer across WAN links.
This is done to save memory resources.
You can easily tune Linux network stack by increasing network buffers size for high-speed networks that connect server systems to handle more network packets.
5. Select the NIC Speed
This method will configure the sysctl tcp parameters according your Network Interface speed.
This option allow you overwrite the default sysctl network values.
Be carefully, wrong parameters can slow down the performance of your server or even crash it.