Riverbed Optimization System (RiOS) must authenticate NTP server before establishing a local, remote, and/or network connection using bidirectional authentication that is cryptographically based.

Without authenticating devices, unidentified or unknown devices may be introduced, thereby facilitating malicious activity. Bidirectional authentication provides stronger safeguards to validate the identity of other devices for connections that are of greater risk.A local connection is any connection with a device communicating without the use of a network. A network connection is any connection with a device that communicates through a network (e.g., local area or wide area network, Internet). A remote connection is any connection with a device communicating through an external network (e.g., the Internet).Because of the challenges of applying this requirement on a large scale, organizations are encouraged to only apply the requirement to those limited number (and type) of devices that truly need to support this capability. For network device management, this has been determined to be network management device addresses, SNMP authentication, and NTP authentication.

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Verify that RiOS is configured to authenticate NTP server before establishing a local, remote, and/or network connection using bidirectional authentication that is cryptographically based (NTP portion of the requirement). Navigate to the device CLI Type: enable Type: show ntp all Verify that at least two NTP Servers are configured Type: show ntp authentication Verify the "Trusted Keys" are defined for use with NTP -- or -- Navigate to the device Management Console Navigate to Configure >> System Settings >> Date and Time Verify that at least two servers are configured in the section "Requested Servers" If no NTP Servers are visible after the command 'show ntp all' or on "Requested Servers", this is a finding.

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Configure RiOS to authenticate NTP server before establishing a local, remote, and/or network connection using bidirectional authentication that is cryptographically based (NTP portion of the requirement). Navigate to the device CLI Type: enable Type: conf t Type: ntp server Type: ntp server Type: ntp authentication key secret 7 Type: ntp authentication trustedkeys Configure 2 NTP Servers Type: ntp enable Type: write memory -- or -- Navigate to the device Management Console Navigate to Configure >> System Settings >> Date and Time Click "Add a New NTP Authentication Key" Set the value of "Key ID" to the required setting (1 to 65534) Set the value of "Key Type" to MD5 or SHA Set the value of "Secret" to the required setting for the NTP server Click "Add" Click '"Add" a New NTP Server' Set the value of "Hostname or IP Address" to the required NTP Server Set the value of "Version" to 3 or 4 depending on the ntp server Set the value of "Key ID" to a value on the trusted key list Set the value of "Enabled/Disabled" to "Enabled" Click "Add" Configure 2 NTP Servers Click "Use NTP Time Synchronization" Click "Apply" Navigate to the top of the web page and click "Save" to save these settings permanently

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SV-77449r1_rule Riverbed Optimization System (RiOS) must authenticate NTP server before establishing a local, remote, and/or network connection using bidirectional authentication that is cryptographically based.

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