About NTP authentication and servers
NTP authentication ensures that the SCC is receiving time information from a trusted NTP server. RiOS 8.5 supports NTP authentication using symmetric keys based on MD5 and SHA1 hash algorithms. MD5 is a widely used cryptographic hash function that generates a 128-bit (16-byte) hash. SHA1 is a more advanced hash function and is considered a successor to MD5.
NTP authentication is optional.
• Configuring NTP authentication involves these steps that you can perform in any order:
• Configure a key ID and a secret pair.
• Configure the key type.
• Configure the NTP server with the key ID.
The default NTP configuration points to the Riverbed-provided NTP server IP address 208.70.196.25 and these public NTP servers:
• 0.riverbed.pool.ntp.org
• 1.riverbed.pool.ntp.org
• 2.riverbed.pool.ntp.org
• 3.riverbed.pool.ntp.org
We recommend synchronizing appliances to an NTP server of your choice.