Director Resource
The Director resource specifies the Name of the Director which is permitted to use the services of the Storage daemon. There may be multiple Director resources. The Director Name and Password must match the corresponding values in the Director’s configuration file.
The following is an example of a valid Director resource definition:
Director {
Name = bacula-dir
Password = my_secret_password
}
The explanation on how to read the directive format:
Name: Contains the linked name of the directive.
Description: Explains what the directive does.
Value: Indicates what type of value to provide (e.g., <type-specification>).
Data Type: Specifies the type of data expected.
Values: Lists specific acceptable values.
Required: If present, indicates that the directive must be set by the user, there is no default value.
Default: If present, indicates that the directive has a predefined value that does not need to be set by the user, cannot be removed.
Comment: Additional important notes.
Example: Shows a usage example.
Director Start of the Director directives.
Description: Specifies the Name of the Director allowed to connect to the Storage daemon.
Value(s):
<name>Data Type: string
Required: Yes
Description: Specifies the password that must be supplied by the above named Director.
Value(s):
<password>Data Type: password
Required: Yes
Description: If Monitor is set to no (default), this director will have full access to this Storage daemon.
Value(s):
<yes|no>Data Type: boolean
Comment: If this director is being used by a Monitor, we highly recommend to set this directive to yes to avoid serious security problems.
Description: This is the list of query commands that the Storage Daemon doesn’t accept from this Director.
Value(s):
<command-list>Data Type: string list
Comment: The list may be any combination of the following commands: diskusage, filename, dircreate, diskperf, scsi_device.
Description: Enable or Disable automatic TLS PSK support.
Value(s):
<yes|no>Data Type: boolean
Default: yes
Comment: TLS PSK is enabled by default between all Bacula components. The Pre-Shared Key used between the programs is the Bacula password. If both TLS Enable and TLS PSK Enable are enabled, the system will use TLS certificates.
Description: Common name attribute of allowed peer certificates.
Value(s):
<certificate-list>Data Type: string list
Comment: This directive is valid for a server and in a client context. If this directive is specified, the peer certificate will be verified against this list. In the case this directive is configured on a server side, the allowed CN list will not be checked if TLS Verify Peer is set to no (TLS Verify Peer is yes by default). This can be used to ensure that only the CN-approved component may connect. This directive may be specified more than once.
In the case this directive is configured in a server side, the allowed CN list will only be checked if TLS Verify Peer = yes (default).
Example: For example, in bacula-fd.conf, Director resource definition:
Director { Name = bacula-dir Password = "password" Address = director.example.com # TLS configuration directives TLS Enable = yes TLS Require = yes # if TLS Verify Peer = no, then TLS Allowed CN will not be checked. TLS Verify Peer = yes TLS Allowed CN = director.example.com TLS CA Certificate File = /opt/bacula/ssl/certs/root_cert.pem TLS Certificate = /opt/bacula/ssl/certs/client1_cert.pem TLS Key = /opt/bacula/ssl/keys/client1_key.pem }In the case this directive is configured in a client side, the allowed CN list will always be checked.
Client { Name = client1-fd Address = client1.example.com FDPort = 9102 Catalog = MyCatalog Password = "password" ... # TLS configuration directives TLS Enable = yes TLS Require = yes # the Allowed CN will be checked for this client by director # the client's certificate Common Name must match any of # the values of the Allowed CN list TLS Allowed CN = client1.example.com TLS CA Certificate File = /opt/bacula/ssl/certs/ca_client1_cert.pem TLS Certificate = /opt/bacula/ssl/certs/director_cert.pem TLS Key = /opt/bacula/ssl/keys/director_key.pem }If the client doesn’t provide a certificate with a Common Name that meets any value in the TLS Allowed CN list, an error message will be issued:
16-Nov 17:30 bacula-dir JobId 0: Fatal error: bnet.c:273 TLS certificate verification failed. Peer certificate did not match a required commonName 16-Nov 17:30 bacula-dir JobId 0: Fatal error: TLS negotiation failed with FD at "192.168.100.2:9102".
Description: Path to PEM encoded Diffie-Hellman parameter file.
Value(s):
<directory>Data Type: string
Comment: If this directive is specified, DH key exchange will be used for the ephemeral keying, allowing for forward secrecy of communications. DH key exchange adds an additional level of security because the key used for encryption/decryption by the server and the client is computed on each end and thus is never passed over the network if Diffie-Hellman key exchange is used. Even if DH key exchange is not used, the encryption/decryption key is always passed encrypted. This directive is only valid within a server context.
To generate the parameter file, you may use openssl:
openssl dhparam -out dh4096.pem -5 4096
Description: When TLS Authenticate is enabled, after doing the CRAM-MD5 authentication, Bacula will also do TLS authentication, then TLS encryption will be turned off, and the rest of the communication between the two Bacula components will be done without encryption. If TLS-PSK is used instead of the regular TLS, the encryption is turned off after the TLS-PSK authentication step.
Value(s):
<yes|no>Data Type: boolean
Description: Verify peer certificate. Instructs server to request and verify theclient’s X.509 certificate.
Value(s):
<yes|no>Data Type: boolean
Default: yes
Comment: Any client certificate signed by a known-CA will be accepted. Additionally, the client’s X509 certificate Common Name must meet the value of the Address directive. If the TLSAllowedCN configuration option is used, the client’s x509 certificate Common Name must also correspond to one of the CN specified in the TLS Allowed CN directive. This directive is valid only for a server and not in client context. The default is yes.
Description: Full path to TLS CA certificate directory. In the current implementation, certificates must be stored PEM encoded with OpenSSL-compatible hashes, which is the subject name’s hash and an extension of .0. One of TLS CA Certificate File or TLS CA Certificate Dir are required in a server context, unless TLS Verify Peer is set to no, and are always required in a client context.
Value(s):
<directory>Data Type: string
Description: The full path and filename of a PEM encoded TLS private key. It must correspond to the TLS certificate.
Value(s):
<filename>Data Type: string
Description: Enable TLS support.
Value(s):
<yes|no>Data Type: boolean
Comment: If TLS is not enabled, none of the other TLS directives have any effect. In other words, even if you set TLS Require = yes you need to have TLS enabled or TLS will not be used.
Description: Require TLS or TLS-PSK encryption.
Value(s):
<yes|no>Data Type: boolean
Comment: This directive is ignored unless one of TLS Enable or TLS PSK Enable is set to yes. If TLS is not required while TLS or TLS-PSK are enabled, then the Bacula component will connect with other components either with or without TLS or TLS-PSK. If TLS or TLS-PSK is enabled and TLS is required, then the Bacula component will refuse any connection request that does not use TLS.
Description: The full path and filename of a PEM encoded TLS certificate.
Value(s):
<filename>Data Type: string
Comment: It will be used as either a client or server certificate, depending on the connection direction. PEM stands for Privacy Enhanced Mail, but in this context refers to how the certificates are encoded. This format is used because PEM files are base64 encoded and hence ASCII text based rather than binary. They may also contain encrypted information. This directive is required in a server context, but it may not be specified in a client context if TLS Verify Peer is set to no in the corresponding server context.
Description: The full path and filename specifying a PEM encoded TLS CA certificate(s).
Value(s):
<filename>Data Type: string
Comment: Multiple certificates are permitted in the file. One of TLS CA Certificate File or TLS CA Certificate Dir are required in a server context, unless TLS Verify Peer (see above) is set to no, and are always required in a client context.
Note
TLS Directives in the Director resource of bacula-dir.conf
Bacula has built-in network encryption code to provide secure network transport similar to that offered by stunnel or ssh. The Bacula TLS encryption applies only to information transmitted across a network, so the data written to Volumes by the Storage daemon is not encrypted by this code.
For more information how to enable TLS encryption, click here.
See also
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