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Configure Security Parameters of SSH Connection

The following example shows how to configure the Anypoint Connector for SFTP (SFTP Connector) to override security parameters using Anypoint Studio.

Create a Configuration Override File

Follow these steps to create the file:

  1. Navigate to your src/main/resources folder.

  2. Create a config file, for example, mule_sshd_config with the following SSHD content. The file follows the format of an sshd_config file:

    KexAlgorithms ecdh-sha2-nistp521,ecdh-sha2-nistp384,ecdh-sha2-nistp256,diffie-hellman-group18-sha512,diffie-hellman-group17-sha512,diffie-hellman-group16-sha512,diffie-hellman-group14-sha256
Ciphers aes128-cbc,aes128-ctr,aes192-cbc,aes192-ctr,aes256-cbc,aes256-ctr
HostKeyAlgorithms ssh-rsa,rsa-sha2-256,rsa-sha2-512
MACs hmac-sha1,hmac-sha2-256,hmac-sha2-512
    Contents of the override config file

  1. Configure the keys and values accordingly. If you do not provide a key, then default values are used.

The following example shows the location of the config file within the src/main/resources folder:

Location of the override config file

Configure the Override File in Anypoint Studio

Follow these steps to configure the override file:

  1. In Studio, navigate to the Global Elements tab.

  2. In the Choose Global Type window, type sftp in the search bar.

  3. Select SFTP Config.

  4. Click OK.

  5. Go to the Advanced tab.

  6. Under Security Configuration, enter ssh config override file.

  7. Enter the path to the file, for example: ${app.home}/mule_sshd_config.

  8. Complete the remaining connection fields.

  9. Click Test Connection…​.

  10. Click OK.

SFTP Configuration with preferred authentication field set to GSSAPI_WITH_MIC

In the Configuration XML editor window, the configuration looks like this:

<sftp:config name="SFTP_Config" doc:name="SFTP Config" >
    <sftp:connection host="localhost" sshConfigOverride="${app.home}/mule_sshd_config">
    </sftp:connection>
</sftp:config>

Verify the Override File Creation

Consider the following points when verifying the file creation:

  • Search for the log Read the config file and verify that the filename and the configuration values fetched from the file are valid.

  • Find ignored configs with the log line Config keys found but ignored.

  • Check that if the connector is unable to locate the file, then it logs Couldn’t locate config file.

See Also

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