Applies To	FTP/SFTP Source
Error Message Text(s)	Your Source server has closed the connection abruptly. Please try again or re-check your Source configuration.

Potential Causes

• The error usually indicates that the Source server is dropping connections. This can happen because of too many parallel connection attempts being made to the server.

Suggested Action(s)

• Update the MaxStartups config value in the /etc/sshd_config file on your SSH server to 50:10:100. This value indicates that there can be a maximum of 50 concurrent unauthenticated connections to the server, before additional connections start getting dropped. The probability of an additional connection being dropped is 10% when the number of connections is 50, and increases linearly with each additional connection attempt. All connection attempts are refused if the number of unauthenticated connections reaches 100.

• Update the MaxSessions config value in the /etc/sshd_config file on your SSH server to 100.

• Contact Hevo Support to increase the connection timeout value.

Note: Any update to the /etc/sshd_config file requires a restart of the SSH server to be applicable. On Debian-based systems, this can be done via the following command:

sudo systemctl restart ssh.service