Technical information

Watson-SHDSL-Router-GUI-Manual.doc
Version 2.3-03
Watson SHDSL Router
Web-based Management Manual
Revision: 2012-02-29
8-53
8.3.7 Class Statistics
Watson provides you with accurate, real-time information on the traffic moving
through your defined device classes. For example, the amount of packets sent,
dropped or delayed, are just a few of the parameters that you can monitor per each
shaping class. To view your class statistics, click 'Class Statistics' under the QoS
menu item. The following screen appears.
Figure 8-58: Class Statistics
Note that class statistics will only be available after defining at least one class (oth-
erwise the screen will not present any information).
8.4 Virtual Private Network
8.4.1 Internet Protocol Security
Internet Protocol Security (IPSec) is a series of guidelines for the protection of In-
ternet Protocol (IP) communications. It specifies procedures for securing private in-
formation transmitted over public networks. The IPSec protocols include:
 AH (Authentication Header) provides packet-level authentication.
 ESP (Encapsulating Security Payload) provides encryption and authentication.
 IKE (Internet Key Exchange) negotiates connection parameters, including keys,
for the other two services.
Services supported by the IPSec protocols (AH, ESP) include confidentiality (en-
cryption), authenticity (proof of sender), integrity (detection of data tampering), and
replay protection (defense against unauthorized resending of data). IPSec also
specifies methodologies for key management. Internet Key Exchange (IKE), the
IPSec key management protocol, defines a series of steps to establish keys for en-
crypting and decrypting information; it defines a common language on which com-
munications between two parties is based. Developed by the Internet Engineering
Task Force (IETF), IPSec and IKE together standardize the way data protection is
performed, thus making it possible for security systems developed by different ven-
dors to interoperate.
8.4.1.1 Technical Specifications
 Security architecture for the Internet Protocol
 IP Security Document Roadmap