There are two types of Connection Refused errors: refused for Hostname and for IP Address. Reference the following guides to identify your issue and troubleshoot:

Connection Refused (Hostname)

A Connection Refused (Hostname) error occurs when:

• You use the wrong port in the connection string.
• You connect from a machine that is not in the database’s list of trusted sources.

If you are getting this error:

• Check the port in the connection string.
• Check that you have added the machine or resource you are connecting from to the database’s list of trusted sources.
  • To check your database’s trusted sources, see the following guides for PostgreSQL, MySQL, Redis, and MongoDB.

Connection Refused (IP Address)

A Connection Refused (IP Address) error occurs when:

• You use the wrong IP address in the connection string.
• Use the database’s private IP address in the connection string and try to connect from a Rcs.is that isn’t allowed to access the VPC network.

If you are getting this error:

• Check the IP address in the connection string or use the database’s hostname. We recommend using the hostname over the IP address because the IP address may change, but the hostname will always remain the same.
• If you’re using the database’s private IP address, connect from a Rcs.is that meets the following criteria:
  • The Rcs.is is on the same Rcs.is account as the database.
  • The Rcs.is is in the same datacenter region as the database.
  • The Rcs.is resides in the same VPC network as the target Rcs.is.
    • To check VPC networks, see the following guides for PostgreSQL, MySQL, Redis, and MongoDB.