aspera.conf - Authorization Configuration

The settings in the <authorization> section of aspera.conf include transfer permissions and token configuration. Tokens are used by Aspera web applications to authorize transfers between Aspera clients and servers.

Note: For security, Aspera recommends denying incoming and outgoing transfers globally, then allowing transfers by individual users, as needed. For a compilation of server security best practices, see Configuring Shares Security.

Configuration methods: These instructions describe how to manually modify aspera.conf. You can also add and edit these parameters using asconfigurator commands. For more information on using asconfigurator, see User, Group and Default Configurations and run the following command to retrieve a complete default aspera.conf that includes the asconfigurator syntax for each setting:

# /opt/aspera/bin/asuserdata -+

Open aspera.conf from the following location:

/opt/aspera/etc/aspera.conf

Add or locate the <authorization> section, as in the following example:

<authorization>
   <transfer>
      <in>
         <value>allow</value>       <!-- Incoming Transfer -->
         <external_provider>
            <url>...</url>   <!-- Incoming External Provider URL -->
            <soap>...</soap> <!-- Incoming External Provider SOAP Action -->
         </external_provider>
      </in>
      <out>
         <value>allow</value>       <!-- Outgoing Transfer -->
         <external_provider>
            <url>...</url>   <!-- Outgoing External Provider URL -->
            <soap>...</soap> <!-- Outgoing External Provider SOAP Action -->
         </external_provider>
      </out>
   </transfer>
   <token>
     <encryption_type>aes-128</encryption_type> <!-- Token Encryption Cipher -->
     <encryption_key> </encryption_key>         <!-- Token Encryption Key -->
     <filename_hash> </filename_hash>           <!-- Token Filename Hash -->
     <life_seconds>86400</life_seconds>         <!-- Token Life (seconds) -->
   </token>
</authorization>

Edit settings as needed.

Authorization Settings Reference

Field	Description	Values	Default
Incoming Transfers	To enable users to transfer to this computer, leave the default setting of `allow`. Set to `deny` to prevent transfers to this computer. Set to `token` to allow only transfers initiated with valid tokens to this computer. Token-based transfers are typically used by web applications such as IBM Aspera Faspex and IBM Aspera Shares and require a Token Encryption Key.	`allow`, `deny`, or `token`	`allow`
Incoming External Provider URL	Set the URL of the external authorization provider for incoming transfers. The default empty setting disables external authorization. Aspera servers can be configured to check with an external authorization provider. This SOAP authorization mechanism can be useful to organizations requiring custom authorization rules. Requires a value for Incoming External Provider SOAP Action.	HTTP URL	blank
Incoming External Provider SOAP Action	The SOAP action required by the external authorization provider for incoming transfers. Required if Incoming External Provider URL is set.	text string	blank
Outgoing Transfers	To enable users to transfer from this computer, leave the default setting of `allow`. Set to `deny` to prevent transfers from this computer. Set to `token` to allow only transfers initiated with valid tokens from this computer. Token-based transfers are typically used by web applications such as Faspex and require a Token Encryption Key.	`allow`, `deny`, or `token`	`allow`
Outgoing External Provider URL	Set the URL of the external authorization provider for outgoing transfers. The default empty setting disables external authorization. HST Server can be configured to check with an external authorization provider. This SOAP authorization mechanism can be useful to organizations requiring custom authorization rules. Requires a value for Outgoing External Provider Soap Action.	HTTP URL	blank
Outgoing External Provider Soap Action	The SOAP action required by the external authorization provider for outgoing transfers. Required if Outgoing External Provider URL is set.	text string	blank
Token Encryption Cipher	Set the cipher used to generate encrypted transfer tokens.	`aes-128`, `aes-192`, or `aes-256`	`aes-128`
Token Encryption Key	Set the secret text phrase that is used to authorize those transfers configured to require token. Aspera recommends setting a token encryption key of at least 20 random characters. For more information, see Require Token Authorization: Set in the GUI or Require Token Authorization: Set from the Command Line.	text string	blank
Token Filename Hash	Set the algorithm with which filenames inside transfer tokens should be hashed. Use MD5 for backward compatibility.	`sha1`, `md5`, or `sha-256`	`sha-256`
Token Life (seconds)	Set the token expiration for users of web-based transfer applications.	positive integer	`86400` (24 hrs)

Save and validate aspera.conf.
Run the following command to confirm that the XML is correctly formatted and the parameter settings are valid:
```
# /opt/aspera/bin/asuserdata -v
```