Meinberg M300 Cisco 5548
The LANTIME M300 Time Server is an extremely flexible platform for applications that require a reliable, stable and accurate source of network time. It offers two 10/100baseT Ethernet ports (four or six optionally) and includes an integrated Meinberg reference clock and a TCXO precision internal oscillator. The front panel LCD and the eight-button keypad provide a convenient means to set the basic network parameters such as IP address, gateway, and netmask. The LCD menu allows configuration of a large number of features and provides detailed status information for the reference signal (synchronization, lock, etc.) or NTP related information (current stratum, offset, and source of synchronization).Because of its modular system architecture it is possible to equip a LANTIME M300 Time Server with a number of different reference time sources.
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The M300 includes a Reference Clock that will synchronize to either GPS, DCF77(PZF), MSF, WWVB, available IRIG/AFNOR Time Codes, or an MRS version which can synchronize to a combination of these with user-selectable priority and switchover time.There are also several precision quartz oscillator options available for applications with higher accuracy and stability requirements. The oscillator determines the holdover characteristics (drift) when the Reference Clock signal is disturbed or temporarily unavailable. Output options include DC power input, additional network or serial ports, different serial string configurations, and frequency and pulse outputs.
.By.Synchronized timing is vitally important when many systems work together in a network. Services such as Logfiles, Correlation of Events, User Authentication Mechanisms, Job Scheduling e.g.
Have a Question about Cisco UCS? Posted on August 9, 2012 by ucsguru. Leave your question in the comments section. Before this section was added many questions were left in the About section above, so why not also check there to see if your question has already been asked. Share this: Twitter. The MRS version of the LANTIME M300 includes a high quality oscillator and is able to function as a reliable time source in applications where no antenna can be installed. Where no source of time is available, the LANTIME M300/MRS can operate in a fully independent mode by simply setting the time manually during initial configuration.
For backups or Active Directories running on distributed platforms use accurate timestamps to record events in chronological order and to avoid conflicts with data replication. Without accurate time synchronization these services cannot operate.As is true for other network services, time synchronization is exposed to numerous cyber vulnerabilities such as hacker attempts and security hazards.
Meinberg M300 Cisco 5548 Series
Spoofing or falsifying of time information may severely influence the operation of time-critical applications and degrade stability of networks.Meinberg therefore dedicates special care and attention to safety and security procedures which are implemented and regularly upgraded on to protect the time service from undesired attacks and keep synchronization operating properly.In this post I will introduce you to some efficient safeguards available in LANTIME Generation 6 Servers which can protect against the vulnerability threats and reduce risks to an acceptable level. Access Control and User ManagementIt is possible to create multiple user accounts on a LANTIME system; each account can be assigned to one of three user privilege levels:.
Super-User full read / write control over Web GUI and Command Line functions. Admin-User restricted read / write control over Web GUI and CLI functions. Info-User read permission onlyFigure 1: A list of multiple users on a LANTIME with different privileges.Password OptionsAll users can be password protected.
One can activate special options to enhance security features of the user passwords as follows:. Minimum password length. Allowance of secure password only. List of valid special characters.
User must change the password periodically in provided intervalsFigure 2: Security levels for password generation.Activation / Deactivation of unsecured network servicesAll available Network Services can be activated /deactivated separately for every interface. Therefore any unsecured network protocols such as FTP, HTTP or Telnet can be deactivated respectively. See the following example:Figure 3: Activation / deactivation of network services for each interface separately. External authentication via TACACS+ and RADIUSThere are several user account authentication methods available on LANTIME systems. One option is an external authentication with TACACS+ or Radius.
Meinberg M300 Cisco 5548 Download
TACACS+ by contrast to Radius refers to a family of protocols for remote authentication and network access control where entire packets are encrypted.TACACS+: Terminal Access Controller Access-Control System (TACACS) is a remote authentication protocol that is used to communicate with an authentication server commonly used in UNIX networks.RADIUS: Remote Authentication Dial In User Service (RADIUS) is a networking protocol that provides centralized Authentication for MEINBERG Time Servers to connect and use the network services. RADIUS is a client/server protocol that runs in the application layer, using UDP as transport.Figure 4: Activation of Remote Authentication in the User Administration dialog.Client / Server Authentication via Autokeys and Symmetric KeysNTP Version 4 supports symmetric keys and additionally provides also the Autokey feature. Both supported by Meinberg LANTIME systems.The authenticity of received time at NTP clients is ensured by the symmetric key technique. By this method every packet is equipped with a 32 bit key ID and a cryptographic 64/128 bit checksum of the packet. This checksum is built with MD5 or DES, both algorithms offer a sufficient protection against data manipulation.Figure 5: Web GUI dialog for NTP MD5 Keys generation.Hardware Protection enabled by Redundant Configuration SetupsThere are a number of methods to assure highly available and reliable operation of Meinberg LANTIME systems. Different redundant configuration setups enable a time server to operate seamlessly if some of its components experience operational difficulties.Meinberg LANTIME and IMS (Intelligent Modular Synchronization) systems allow redundant configuration to protect from the following potential failures:1.
Power supply failure2. Reference clock failure (signal loss or malicious disturbing)3. Network unavailability4.
Inadequate server performance5. Physical damage.More about various redundant configuration setups using LANTIME systems refer to one of the older posts:If you wish to learn more on NTP safety and protection measures of the network timing, visit a NTP Complete Training atMore information about NTP Time servers for networks of different sizes and industries you can find at Meinberg website:Enjoy Your Summer and Stay In Sync with Us! Very good and informative post -as relates to NTP. But what about PTP. It is often seen or implied the two are similar and one can be substituted for the other with the difference being mainly in time accuracy. Does this hold true in the context of Security and Protection?–Fred Huffman, Huffman Technical ServicesPS: So glad to see the use of “Security and Protection”, which I take to mean Security of Timing Signals, and Protection of the network carrying or distributing them.Thanks in advance for any comments back!
Security is a problem for network timing protocols. PTP currently has only an experimental security mechanism defined in the standard. This mechanism is generally viewed as flawed by PTP community. As a result commercial products which include PTP, don’t implement it.NTP is better off. It has a built in security mechanism, which is available in the most of the devices, or free software clients. Unfortunately it relies on a MD5, a hashing algorithm which has been broken.The good news is security is currently being worked on in the standards organizations. The upcoming revision of IEEE 1588 will include an optional authentication TLV, and an infomative annex on securing PTP.
The authentication header is not a complete solution for a native security mechanism, since key exchange still needs to be specified. But it’s a start. The NTP security mechanism is being scrapped for a new mechanism, which will include key disribution.
Both new standards may get published this year.— Doug. Andreja JarcDr. Andreja Jarc is a Director of the - a department within the Meinberg Company offering Trainings and Workshops on Synchronization Technology for end users and interested technical public. Her duties additionally include Technical Marketing and Technical Content Development.Andreja holds a degree as Dipl.-Ing. (univ.) and Ph.D.
In Electrical Engineering from University of Ljubljana in Slovenia. Prior to this she worked as a Research Fellow at the Technical University of Munich in Germany and the Technical University of Graz in Austria.
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