From Network Security Wiki

Syslog Server

Rsyslog will be installed by default in Latest Ubuntu server. Install it if it is not already installed:

sudo apt-get install rsyslog

Edit the Rsyslog config file

sudo nano /etc/rsyslog.conf
# provides UDP syslog reception
$ModLoad imudp
$UDPServerRun 514
# provides TCP syslog reception
$ModLoad imtcp
$InputTCPServerRun 514

Restart rsyslog service

sudo service rsyslog restart

Verify if the Server listens to this port

netstat -an | grep 514

Validate your rsyslog configuration file:

sudo rsyslogd -N1

Syslog Client

  • On the Client Machine:
sudo nano /etc/rsyslog.d/50-default.conf
  • Add the following line at the top of the file before the log by facility section, :
*.*                         @

  • In case you want only certain syslog alerts to be logged to remote server:
auth,authpriv.*              @
  • Settings for when Rsyslog Server would be down:
$ActionQueueFileName queue
$ActionQueueMaxDiskSpace 1g
$ActionQueueSaveOnShutdown on
$ActionQueueType LinkedList
$ActionResumeRetryCount -1
  • Restart rsyslog service
sudo service rsyslog restart

For verification, below command will generate a new Syslog file:

logger “Hello World”
logger –t ScriptName “Hello World”
logger -p "This is a info message from local 4"


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