8.3.1 Using SSH key authentication. SEPTENTRIO AsteRx-U

8.3. USER ACCESS: AN EXAMPLE

8.3.1 Using SSH key authentication

By default, anonymous users have full access over FTP, SFTP and rsync to the files logged on the AsteRx-U. FTP, SFTP and rsync access can be limited by configuring user access, as described in Section 8.1. For added security, user authentication for SFTP and rsync access can be configured using an SSH public key. When an SSH key is defined, the configured user can download files using SFTP or rsync without entering a password provided of course, that the matching private key is known by the key agent running on the same PC.

You can generate public and private keys using for example, PuTTY Key Generator as shown in Figure 8-5.

Figure 8-5: Generating SSH keys using the PuTTY Key Generator. The public key is highlighted.

The generated public key is the highlighted text that can be pasted directly into the SSH Key field of the AsteRx-U Web Interface as shown in Figure 8-6.

Figure 8-6: Using an SSH Key

521-bit ECSDA keys offer the best security however, ECSDA 256 and 384-bit keys can also be used. Alternatively, RSA 512 and 1024 key encryption is also supported.

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