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What is a Syslog Server and How Does it Work?
System Logging Protocol (Syslog) is a way network devices can use a standard message format to communicate with a logging server. It was designed specifically to make it easy to monitor network devices. Devices can use a Syslog agent to send out notification messages under a wide range of specific conditions.
These log messages include a timestamp, a severity rating, a device ID (including IP address), and information specific to the event. Though it does have shortcomings, the Syslog protocol is widely applied because it is simple to implement, and is fairly open-ended, allowing for a lot of different proprietary implementations, and thus the ability to monitor almost any connected device.
Syslog works on all flavors of Unix, Linux, and other *nix, as well as MacOS. Windows-based servers don’t support Syslog natively, but many third-party tools are available to allow Windows devices to communicate with a Syslog server.
The Necessity of Logging:
A big advantage of syslog is that the log server can monitor a vast number of syslog events via log files. Routers, switches, firewalls, and servers can generate log messages, as well as many printers and other devices.
The syslog server receives, categorizes, and stores log messages for analysis, maintaining a comprehensive view of what is going on everywhere on the network. Without this view, devices can malfunction unexpectedly, and outages can be hard to trace. (ref: whatsupgold.com)
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