Rsyslog : Output Logs to Remote Host2015/06/18

Configure Rsyslog to output logs to remote host.
This example based on environment below.

+----------------------+          |          +----------------------+
| [  Syslog Server   ] |10.0.0.30 | 10.0.0.51| [  Syslog Client   ] |
|     dlp.srv.world    +----------+----------+    node01.srv.world  |
|                      |                     |                      |
+----------------------+                     +----------------------+

[1]	Configure Log Managed Server to receive logs from client servers.

[root@dlp ~]#

vi /etc/rsyslog.conf

# line 19-20: uncomment

$ModLoad imtcp
$InputTCPServerRun 514

# specify senders you permit to access

$AllowedSender TCP, 127.0.0.1, 10.0.0.0/24, *.srv.world

[root@dlp ~]#

systemctl restart rsyslog

[2]	Configure Client Servers.

[root@node01 ~]#

vi /etc/rsyslog.conf

# for example, output logs for "authpriv.*" to remote host

authpriv.*

@@dlp.srv.world:514

# line 73: uncomment all

$ActionQueueFileName fwdRule1 # unique name prefix for spool files
$ActionQueueMaxDiskSpace 1g   # 1gb space limit (use as much as possible)
$ActionQueueSaveOnShutdown on # save messages to disk on shutdown
$ActionQueueType LinkedList   # run asynchronously
$ActionResumeRetryCount -1    # infinite retries if host is down

[root@node01 ~]#

systemctl restart rsyslog

[3]	After configuration of above, logs for kinds of authentication are recorded on Log Managed Server like follows.

[root@dlp ~]#

tail -10 /var/log/secure

Jun 17 11:24:47 dlp sshd[9582]: Connection closed by 127.0.0.1 [preauth]
Jun 17 11:27:46 node01 login: pam_unix(login:session): session closed for user root
Jun 17 11:27:52 node01 login: pam_unix(login:auth): check pass; user unknown
Jun 17 11:27:52 node01 login: pam_unix(login:auth): authentication failure; logname=LOGIN uid=0 euid=0
Jun 17 11:27:54 node01 login: FAILED LOGIN 1 FROM ttyS0 FOR (unknown), User not known to the underlyin
Jun 17 11:27:59 node01 login: pam_unix(login:session): session opened for user root by LOGIN(uid=0)
Jun 17 11:27:59 node01 login: DIALUP AT ttyS0 BY root
Jun 17 11:27:59 node01 login: ROOT LOGIN ON ttyS0
Jun 17 11:28:44 node01 su: pam_unix(su-l:session): session opened for user cent by root(uid=0)
Jun 17 11:28:54 node01 sudo: cent : TTY=ttyS0 ; PWD=/home/cent ; USER=root ; COMMAND=/bin/cat /etc/sha

[4]	If you'd like to separate logs for each Host, for each date, Configure like follows.

[root@dlp ~]#

vi /etc/rsyslog.conf

# add: define logfiles

$template Secure_log,"/var/log/secure.d/%fromhost%_%$year%%$month%%$day%.secure"

# add: specify logfiles defined above

authpriv.*

-?Secure_log

[root@dlp ~]#

systemctl restart rsyslog

[root@dlp ~]#

ll /var/log/secure.d

total 8
-rw-r--r-- 1 root root 350 Jun 17 11:34 dlp_20150617.secure
-rw-r--r-- 1 root root 380 Jun 17 11:34 node01.srv.world_20150617.secure

Matched Content