Syslog-NG 日志服务器安装与配置

Syslog-NG日志服务器安装与配置

 

此安装配置可与Cacti服务器结合,用Syslog插件功能实现web浏览

 

一.服务器端安装及配置

1.从syslog-ng的官方网站上下载编译好的rpm包,针对rhel的.

我把需要的rpm打个包放在这里了.

文件:	Syslog-NG.rar
大小:	859KB
下载:	下载

2.安装(服务器跟客户端安装都一样,这里指的是linux客户端,windows客户端需要另外的软件)

[root@Kevin syslog]# ls
libdbi8-0.8.2bb2-3.rhel5.i386.rpm  libdbi8-dev-0.8.2bb2-3.rhel5.i386.rpm  libevtlog0-0.2.8-1.i386.rpm  syslog-ng-2.1.3-1.i386.rpm

安装libevt

[root@Kevin syslog]# rpm -ivh libevtlog0-0.2.8-1.i386.rpm
Preparing...                ########################################### [100%]
   1:libevtlog0             ########################################### [100%]

安装syslog-ng

[root@Kevin syslog]# rpm -vih libdbi8-0.8.2bb2-3.rhel5.i386.rpm libdbi8-dev-0.8.2bb2-3.rhel5.i386.rpm syslog-ng-2.1.3-1.i386.rpm
warning: libdbi8-0.8.2bb2-3.rhel5.i386.rpm: Header V3 DSA signature: NOKEY, key ID 2aa28252
Preparing...                ########################################### [100%]
   1:libdbi8                ########################################### [ 33%]
   2:libdbi8-dev            ########################################### [ 67%]
   3:syslog-ng              ########################################### [100%]

Shutting down kernel logger: [  OK  ]
Shutting down system logger: [  OK  ]
Starting syslog-ng: [  OK  ]

3.服务器端配置

[root@Kevin syslog]# cd /etc/syslog-ng

[root@Kevin syslog-ng]# cp syslog-ng.conf syslog-ng.conf.bak

[root@Kevin syslog-ng]# vim syslog-ng.conf  ---之前的一篇文章里已经有单独说到这个了

# syslog-ng configuration file.
#
# This should behave pretty much like the original syslog on RedHat. But
# it could be configured a lot smarter.
#
# See syslog-ng(8) and syslog-ng.conf(5) for more information.
#
# 20090105

#
#

options {
  sync(0);
  time_reopen(10);
  log_fifo_size(1024);
  long_hostnames(off);
  use_dns(no);
  use_fqdn(no);
  create_dirs(yes);
  keep_hostname(yes);
  };

source s_sys { pipe ("/proc/kmsg" log_prefix("kernel: ")); unix-stream ("/dev/log"); internal(); };

 

destination d_cons { file("/dev/console"); };
destination d_mesg { file("/var/log/messages"); };
destination d_auth { file("/var/log/secure"); };
destination d_mail { file("/var/log/maillog"); };
destination d_spol { file("/var/log/spooler"); };
destination d_boot { file("/var/log/boot.log"); };
destination d_cron { file("/var/log/cron"); };
destination d_mlal { usertty("*"); };
destination d_kernel  { file("/var/log/kern"); };

filter f_filter1     { facility(kern); };
filter f_filter2     { level(info) and
                         not (facility(mail)
                             or facility(authpriv)
                             or facility(cron)
                             or program("kernel")); };

filter f_filter3     { facility(authpriv); };
filter f_filter4     { facility(mail); };
filter f_filter5     { level(emerg); };
filter f_filter6     { facility(uucp) or
                     (facility(news) and level(crit)); };
filter f_filter7     { facility(local7); };
filter f_filter8     { facility(cron); };
filter f_kernel      { level(info) and program("kernel"); };

#log { source(s_sys); filter(f_filter1); destination(d_cons); };
log { source(s_sys); filter(f_filter2); destination(d_mesg); };
log { source(s_sys); filter(f_filter3); destination(d_auth); };
log { source(s_sys); filter(f_filter4); destination(d_mail); };
log { source(s_sys); filter(f_filter5); destination(d_mlal); };
log { source(s_sys); filter(f_filter6); destination(d_spol); };
log { source(s_sys); filter(f_filter7); destination(d_boot); };
log { source(s_sys); filter(f_filter8); destination(d_cron); };
log { source(s_sys); filter(f_kernel); destination(d_kernel); };

source net {
        udp();
#       tcp();
};

destination d_mysql {
        pipe("/tmp/mysql.pipe"
         template("INSERT INTO syslog_incoming (host, facility, priority, date, time, message) VALUES ( '$HOST', '$FACILITY', '$PRIORITY', '$YEAR-$MONTH-$DAY', '$HOUR:$MIN:$SEC', '$MSG' );\n")
         template-escape(yes)
        );
 };

log { source(net); destination(d_mysql); };
log { source(s_sys); destination(d_mysql); };
# vim: syntax=syslog-ng

 

[root@Kevin syslog-ng]# service syslog-net restart

Restarting syslog-ng:
Shutting down syslog-ng:                                   [  OK  ]
Starting syslog-ng:                                        [  OK  ]

 

二.客户端安装及配置

1.linux服务器客户端安装及配置

安装跟服务器端一样的,这里就不多说了.

配置

在/etc/syslog-ng/syslog.conf里只需要加三行就可以了 把其它的全部都注释掉

内容如下:

source s_local { pipe ("/proc/kmsg" log_prefix("kernel: ")); unix-stream ("/dev/log"); internal(); };

destination d_udp { udp("172.16.16.18" port(514)); };
log { source(s_local); destination(d_udp); };

然后再重启syslog-ng服务就可以了.

注意:

上面的配置会导致本地没有任何日志信息了,因为全部都发送到了日志服务器上面了.如果想在本地保留一份日志信息,那么在syslog-ng里面再加入三行

内容如下:

source s_local { pipe ("/proc/kmsg" log_prefix("kernel: ")); unix-stream ("/dev/log"); internal(); };
destination d_syslognglog { file("/var/log/syslog-ng.log"); };
log { source(s_local); destination(d_syslognglog); };

这样本地也就有一份日志信息了,保存在/var/log/syslog-ng.log里面.

 

2.使用默认的syslog做为syslog-ng的客户端,这样可以避免在太多客户端的情况下需要安装syslog-ng软件,而且配置更容易.

[root@Kevin ~]# vim /etc/syslog.conf

# Log all kernel messages to the console.
# Logging much else clutters up the screen.
#kern.*                                                 /dev/console

# Log anything (except mail) of level info or higher.
# Don't log private authentication messages!
#*.info;mail.none;authpriv.none;cron.none               /var/log/messages
*.info;mail.none;authpriv.none;cron.none                @172.16.16.18

 

# The authpriv file has restricted access.
authpriv.*                                              /var/log/secure

# Log all the mail messages in one place.
mail.*                                                  -/var/log/maillog

# Log cron stuff
cron.*                                                  /var/log/cron
cron.*                                                  @172.16.16.18

 

# Everybody gets emergency messages
*.emerg                                                 *

# Save news errors of level crit and higher in a special file.
uucp,news.crit                                          /var/log/spooler

# Save boot messages also to boot.log
local7.*                                                /var/log/boot.log
local7.*                                                @172.16.16.18

 

其中有@标识的就是把日志发送到日志服务器的,例如:

cron.*                                                  @172.16.16.18

这一行表示把cron的日志发送到日志服务器172.16.16.18上面去.

原来的配置我并没有改动,因为这样就可以保持原来的日志一样写入到本地.方便查看.

完成配置后重启syslog服务

[root@Kevin syslog-ng]# service syslog restart
Shutting down kernel logger:                               [  OK  ]
Shutting down system logger:                               [  OK  ]
Starting system logger:                                    [  OK  ]
Starting kernel logger:                                    [  OK  ]

 

3.windows服务器客户端配置

A.安装syslog-ng代理软件:SnareSetup-3.1.3-MultiArch.exe,为什么用这个呢,这个配置简单易用.

这个软件在之前的一篇文章里就已经有了,请到那里下载.谢谢~~~

安装很简单,双击exe文件,下一步,下一步.其中有一步是问需要不需要密码,是用默认的snare做为用户跟密码还是用本地系统的用户,还是创建一个帐号做为认证,这个就取决于个人了.点击安装完成.

B.配置snare

点击开始--程序--选择InterSect Alliance--snare for windows 后是一个web形式的,地址为:

默认是不需要密码的,可以配置为需要用户名跟密码来认证.

首先我们配置日志服务器这一部分,也是最主要的部分,如果这一部分配置不正确的话,那日志服务器上也就不会有这台机器的日志信息了.

点击左边的: 如下所示

SNARE Network Configuration

The following network configuration parameters of the SNARE unit is set to the following values:

Override detected DNS Name with:
Destination Snare Server address
Destination Port
Perform a scan of ALL objectives, and display the maximum criticality?
Allow SNARE to automatically set audit configuration?
Allow SNARE to automatically set file audit configuration?
Export Snare Log data to a file?
Enable active USB auditing? (This option requires the service to be fully restarted)
Enable SYSLOG Header?
SYSLOG Facility	KernelUserMailDaemonAuthSyslogLprNewsUUCPCronAuthprivFtpLocal0Local1Local2Local3Local4Local5Local6Local7
SYSLOG Priority	EmergencyAlertCriticalErrorWarningNoticeInformationDebugDYNAMIC

 

Destination Snare Server address ---这个就是日志服务器的IP地址了.一般不用域名,怕解释不到.

Destination Port --- 这个就是日志服务器的端口了 一般默认是514

Destination Snare Server address
Destination Port

Allow SNARE to automatically set audit configuration?
Allow SNARE to automatically set file audit configuration?

这两个默认是打上勾的了.

Enable SYSLOG Header?
SYSLOG Facility	KernelUserMailDaemonAuthSyslogLprNewsUUCPCronAuthprivFtpLocal0Local1Local2Local3Local4Local5Local6Local7
SYSLOG Priority	EmergencyAlertCriticalErrorWarningNoticeInformationDebugDYNAMIC

Enable Syslog Header一般把勾打上.下面两个就根据你的需要来设置了.

设置完成后再点下面的 Change Configureation 应用配置

 

还有一个重要的配置,那就是决定把什么样的日志发送到日志服务器呢?

再点左边的:,如下所示:

SNARE Filtering Objectives Configuration

The following filtering objectives of the SNARE unit are active:

Action Required	Criticality	Event ID Include/Exclude	Event ID Match	User Include/Exclude	User Match	General Match	Return	Event Src
	Information	Include	Logon_Logoff	Include	*	*	Success Failure Error Information Warning	Security
	Clear	Include	Process_Events	Include	*	cmd.exe	Success Failure Error Information Warning	Security
	Warning	Include	User_Group_Management_Events	Include	*	*	Success Failure Error Information Warning	Security
	Information	Include	Reboot_Events	Include	*		Success Failure	Security
	Priority	Include	Security_Policy_Events	Include	*		Success Failure Error Information Warning	Security
	Information	Include	*	Include	*		Success Failure Error Information Warning	System Application

                           Select this button to add a new objective.

 

这个修改就要看个人的需求是什么样的了,我这里就不多说了.

全部完成后记得点左边的: 来应用所有的配置!

 

当然Snare还有其它的功能,比如远程操控这个代理软件,自己多摸索吧 呵呵 .

 

三、防火墙配置

在日志服务器上要让iptables允许514端口通过，不然服务器无法接收到客户端的日志信息。

加两条规则，如下：

-A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 514 -j ACCEPT
-A RH-Firewall-1-INPUT -p udp -m state -m udp --dport 514 --state NEW -j ACCEPT

 

一般一条就够了，那就是第二条，一般的日志传输都会用到udp。效率高一些。