Message Authentication Codes (MAC) are algorithms used to confirm data has not been altered between the client and server. Some cipher algorithms allow for variable sized keys, while others only allow a specific key size. The length of the key correlates with the strength of that algorithm; larger keys are harder to break than shorter keys.
EFT Server supports the following encryption algorithms:
twofish-cbc (256 bits)
twofish128-cbc (128 bits)
blowfish-cbc (128 bits)
3des-cbc (192 bits)
arcfour (128 bits)
cast128-cbc (128 bits)
aes256-cbc (256 bits)
twofish256-cbc (256 bits)
aes128-cbc (128 bits)
To select Message Authentication Codes (MAC)
In the Administrator, connect to EFT Server and click the Server tab.
In the left pane, select the Site you want to configure.
In the right pane, select the Connections tab.
Click SFTP Config. The SFTP Settings dialog box appears.
In the Allowed MACs list, clear or select the check boxes to specify which algorithms you want to use for message authentication.
Click OK to close the dialog box.
Click Apply. EFT Server tries each selected MAC with the client until an algorithm is agreed upon.
Server SFTP Key Support
Server SSH Key Formats
Enabling SFTP for a Site
Creating an SSH Key Pair
Viewing or MAC Settings
Creating SFTP Algorithms
Allowing Access Using SFTP Protocol
Viewing, Importing, Renaming, and Deleting Client Keys
Modifying the SFTP Identification String