For details installing syslog-ng on specific operating systems, see Installing syslog-ng. Configure the local sources to collect the log messages of the host. Starting with version 3.
For a complete list of messages that are collected automatically, see system: Collecting the system-specific log messages of a platform. To configure syslog-ng OSE, edit the syslog-ng. The location of the configuration file depends on how you installed syslog-ng OSE. Add sources to collect the messages from your log files. File sources look like this:. Name every source uniquely.
For details on configuring file sources, see file: Collecting messages from text files. Many applications send log messages to logfiles by default for example, the Roundcube webmail client, or the ProFTPD FTP server , but can be configured to send them to syslog instead. If possible, it is recommended to reconfigure the application that way. The default configuration file of syslog-ng OSE collects platform-specific log messages and the internal log messages of syslog-ng OSE.
Create a network destination that points directly to the syslog-ng server, or to a local relay. The network destination greatly depends on the protocol that your log server or relay accepts messages. Create a log statement connecting the local sources to the syslog-ng server or relay. For example:. If the logs will also be stored locally on the host, create local file destinations. Set filters, macros and other features and options for example TLS encryption as necessary.
The following is the default configuration file of syslog-ng OSE 3. The following is a simple configuration file that collects local log messages and forwards them to a logserver using the IETF-syslog protocol. Configure the network sources that collect the log messages sent by the clients and relays. How the network sources should be configured depends also on the capabilities of your client hosts: many older networking devices support only the legacy BSD-syslog protocol RFC using UDP transport:.
Starting with syslog-ng OSE version 3. Create local destinations that will store the log messages, for example file- or program destinations. For details on further macros and how to use them, see template and rewrite: Format, modify, and manipulate log messages. Set filters, options for example TLS encryption and other advanced features as necessary. By default, the syslog-ng server will treat the relayed messages as if they were created by the relay host, not the host that originally sent them to the relay.
In order to use the original hostname on the syslog-ng server, use the keep-hostname yes option both on the syslog-ng relay and the syslog-ng server. This option can be set individually for every source if needed. If you are relaying log messages and want to resolve IP addresses to hostnames, configure the first relay to do the name resolution.
The following is a simple configuration file for syslog-ng Open Source Edition that collects incoming log messages and stores them in a text file. Enable the keep-hostname and disable the chain-hostnames options. For details on how these options work, see chain-hostnames. The following is a simple configuration file that collects local and incoming log messages and forwards them to a logserver using the IETF-syslog protocol.
Feedback Terms of Use Privacy. Upgrade to IE 11 Click here. Below is an example of static IP configuration for the interface ens3. You can also change the owner of the saved log files there. Do not forget to restart syslog-ng service after your changes in the config file.
Check a content of the directory with the command:. As you can see they are two directories Let's inspect a log file of a router These two commands configure a Cisco router for sending logs with a priority 5 notification to a syslog server with IP address R1 config logging trap notifications R1 config logging host Your email address will not be published.
This site uses Akismet to reduce spam. Copy the following text into the new client configuration file:. Save and close that file. Start and enable syslog-ng in the same fashion you did on the collector.
You should see output that includes log entries for both collector and client Figure A. Congratulations, syslog-ng is working. You can now log into your collector to view logs from both the local machine and the remote client. If you have more Linux servers in your data center, walk through the process of installing syslog-ng and setting each of them up as a client to send their logs to the collector, so you no longer have to log into individual machines to view logs.
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