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Table Of Contents
The NTP Sanity Limit ...........................................................................................................232
NTP And The Precision Time Protocol Card........................................................................232
Included With NTP ...............................................................................................................232
NTP Configuration.........................................................................................................................233
NTP Server Main Menu.............................................................................................................233
Generic Options.........................................................................................................................233
Servers Configuration................................................................................................................234
Peers Configuration....................................................................................................................234
Viewing NTP Status...................................................................................................................234
Viewing The NTP Log ..............................................................................................................235
Viewing GPS Status...................................................................................................................236
Viewing The GPS Log ..............................................................................................................236
Chapter 26 - Configuring SSH ..........................................................................................................237
Introduction....................................................................................................................................237
SSH Fundamentals ....................................................................................................................237
Included With SSH................................................................................................................237
SSH Configuration.........................................................................................................................237
SSH Main Menu.........................................................................................................................237
Authentication ...........................................................................................................................238
Networking ................................................................................................................................238
Access Control .......................................................................................................................239
Chapter 27 - Configuring IRIGB And IEEE1588..............................................................................241
Introduction....................................................................................................................................241
IEEE1588 Fundamentals............................................................................................................241
PTP Network Roles................................................................................................................241
PTP Master Election..............................................................................................................242
Synchronizing NTP from IEEE1588......................................................................................242
IRIGB Fundamentals..................................................................................................................242
IRIGB Output Formats...........................................................................................................243
Reference Clocks...................................................................................................................243
How The Router Selects A Reference Clock.........................................................................243
GPS Cable compensation...........................................................................................................243
IRIGB/IEEE1588 Configuration....................................................................................................244
IRIGB/IEEE1588 Main Menu....................................................................................................244
General Configuration ...............................................................................................................244
IRIGB Configuration .................................................................................................................245
IEEE1588 Configuration............................................................................................................245
IRIGB Status..............................................................................................................................246
IEEE1588 Status........................................................................................................................246
IRIGB Log..................................................................................................................................246
Chapter 28 - Configuring the Intrusion Detection System.................................................................247
Introduction....................................................................................................................................247
Snort Fundamentals....................................................................................................................247
Which Interfaces To Monitor.................................................................................................247
Snort Rules.............................................................................................................................247
Alerting Methods...................................................................................................................247
Performance And Resources..................................................................................................248
IDS Configuration..........................................................................................................................249
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