The syslog-ng application is not log analysis software. It can filter log messages and select only the ones matching certain criteria. It can even convert the messages and restructure them to a predefined format, or parse the messages and segment them into different fields. But syslog-ng cannot interpret and analyze the meaning behind the messages, or recognize patterns in the occurrence of different messages.
Log messages contain information about the events happening on the hosts. Monitoring system events is essential for security and system health monitoring reasons.
The original syslog protocol separates messages based on the priority of the message and the facility sending the message. These two parameters alone are often inadequate to consistently classify messages, as many applications might use the same facility, and the facility itself is not even included in the log message. To make things worse, many log messages contain unimportant information. The syslog-ng application helps you to select only the really interesting messages, and forward them to a central server.
Company policies or other regulations often require log messages to be archived. Storing the important messages in a central location greatly simplifies this process.
Version 3.25 of syslog-ng Open Source Edition includes the following main features.
You can use the syslog-ng-cfg-db.py utility to list the available options of configuration objects. For example, you can list all the options that can be set in the file source, and so on. For details, see "Listing configuration options" in the Administration Guide.
Starting with syslog-ng OSE
The default-network-drivers() source now supports the max-connections() option.
Starting with
log {
source { python(class(PyNetworkSource) options("port" "8080") persist-name("<unique-string>); };
source { python(class(PyNetworkSource) options("port" "8081")); };
};
Alternatively, you can include the following line in the Python package: @staticmethod generate_persist_name. For example:
from syslogng import LogSource
class PyNetworSource(LogSource):
@staticmethod
def generate_persist_name(options):
return options["port"]
def run(self):
pass
def request_exit(self):
passThe syslog-ng application is used worldwide by companies and institutions who collect and manage the logs of several hosts, and want to store them in a centralized, organized way. Using syslog-ng is particularly advantageous for:
Internet Service Providers
Financial institutions and companies requiring policy compliance
Server, web, and application hosting companies
Datacenters
Wide area network (WAN) operators
Server farm administrators.
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