NetComm Wireless NTC-6200-01, Руководство пользователя

Страница: 104 / 120

104
NetComm Wireless Intelligent M2M Router www.netcommwireless.com
Host key management
SSH keys provide a means of identification using public key cryptography and challenge response authentication. This means that a secure connection can be established without transmitting a
password, thereby greatly reducing the threat of someone eavesdropping and guessing the correct credentials.
SSH Keys always come in pairs with one being a public key and the other a private key. The public key may be shared with any server to which you want to connect. When a connection request
is made, the server uses the public key to encrypt a challenge (a coded message) to which the correct response must be given. Only the private key can decrypt this challenge and produce the
correct response. For this reason, the private key should not be shared with those who you do not wish to give authorization.
The Host key management section displays the current public keys on the router and their date and timestamp. These public keys are provided in different formats, including DSA, RSA and
ECDSA. Each format has advantages and disadvantages in terms of signature generation speed, validation speed and encryption/decryption speed. There are also compatibility concerns to
consider with older clients when using ECDSA, for example.
Generating new keys
The complete set of keys can be re-generated by selecting the
Generate keys
button. This key generation process takes approximately 30 seconds to complete.
Downloading keys
The
Get keys
button allows you to download the complete set of public and private keys while the
Get public keys
button will download only the set of public keys.
Uploading your own key files
Click the Upload keys button to upload your own public key to the router.
Client key management
The Client Key Management section is used for uploading the public key file of clients. To upload a client public key, click the
Upload
button, browse to the file and click
Open
.
When the file is uploaded, it is examined for validity. If the key file is not a valid public key, it will not be uploaded.