Rsyslog : Output logs to Remote Host2015/03/31

	Configure Rsyslog to output logs to remote host. This example based on environment below. (1) dlp.srv.world [10.0.0.30] Log Managed Server (2) node01.srv.world [10.0.0.51] Client Server (Output logs to Managed Server)
[1]	Configure Log Managed Server to receive logs from client servers.

[root@dlp ~]#

vi /etc/rsyslog.conf

# line 17, 18: 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 ~]#

/etc/rc.d/init.d/rsyslog restart

Shutting down system logger: [ OK ]
Starting system logger: [ OK ]

[2]	Configure Client Servers.

[root@node01 ~]#

vi /etc/rsyslog.conf

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

authpriv.*

@@dlp.srv.world:514

# line 73: uncomment all

$WorkDirectory /var/lib/rsyslog # where to place spool files
$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 ~]#

/etc/rc.d/init.d/rsyslog restart

Shutting down system logger: [ OK ]
Starting system logger: [ OK ]

[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

Apr  1 02:50:24 dlp login: DIALUP AT ttyS0 BY root
Apr  1 02:50:24 dlp login: ROOT LOGIN ON ttyS0
Apr  1 21:56:35 node01 login: pam_unix(login:session): session closed for user root
Apr  1 21:56:41 node01 login: pam_unix(login:session): session opened for user root by (uid=0)
Apr  1 21:56:41 node01 login: DIALUP AT ttyS0 BY root
Apr  1 21:56:41 node01 login: ROOT LOGIN ON ttyS0
Apr  1 21:57:46 node01 sshd[1022]: Accepted password for cent from 10.0.0.30 port 51970 ssh2
Apr  1 21:57:46 node01 sshd[1022]: pam_unix(sshd:session): session opened for user cent by (uid=0)
Apr  1 21:57:46 node01 sshd[1024]: Received disconnect from 10.0.0.30: 11: disconnected by user
Apr  1 21:57:46 node01 sshd[1022]: pam_unix(sshd:session): session closed for user cent

[4]	If you'd like to separate logs for a Host, for a 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 ~]#

/etc/rc.d/init.d/rsyslog restart

Shutting down system logger: [ OK ]
Starting system logger: [ OK ]

[root@dlp ~]#

ll /var/log/secure.d

total 8
-rw------- 1 root root 376 Apr  2 12:58 10.0.0.51_20150402.secure
-rw------- 1 root root 368 Apr  2 12:59 dlp_20150402.secure

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