0x00 准备工作


CentOS 6.2我是最小化安装,同时使用163的源进行update,所以还需要安装如下的依赖包:

[[email protected] ~]$ sudo yum install gcc make pcre pcre-devel libpcap libpcap-devel

同时需要关闭iptables、ip6tables:

[[email protected] ~]$ sudo service iptables stop
[[email protected] ~]$ sudo service ip6tables stop
[[email protected] ~]$ sudo chkconfig --level 2345 iptables off
[[email protected] ~]$ sudo chkconfig --level 2345 ip6tables off

需要下载的软件:

Suricata
http://www.openinfosecfoundation.org/index.php/downloads
Barnyard 2
http://www.securixlive.com/barnyard2/
Base
http://base.secureideas.net/
yaml
http://pyyaml.org/
adodb
http://sourceforge.net/projects/adodb/
rules
http://rules.emergingthreats.net/open/suricata/emerging.rules.tar.gz
Image_Canvas
http://download.pear.php.net/package/Image_Canvas-0.3.3.tgz
Image_Graph
http://download.pear.php.net/package/Image_Graph-0.8.0.tgz

0x01 配置APM环境


Base需要APM(Apache、PHP、Mysql)环境,通过yum来进行安装。

[[email protected] ids]$ sudo yum install httpd php mysql mysql-server mysql-devel php-mysql php-gd php-pear

启动httpd、mysql服务

[[email protected] ids]$ sudo /etc/init.d/httpd start
[[email protected] ids]$ sudo /etc/init.d/mysqld start

默认的web根目录是/var/www/html,在此目录新建phpinfo测试文件,来确认配置是否正确。

PS:mysql安装后root账号默认口令为空,通过下面命令可以修改root账号口令

[[email protected] ~]$ mysqladmin -uroot -p password [新密码]

0x02 安装Barnyard 2


安装过程如下:

[[email protected] ids]$ tar zxvf barnyard2-1.9.tar.gz
[[email protected] ids]$ cd barnyard2-1.9
[[email protected] barnyard2-1.9]$ ./configure --with-mysql
[[email protected] barnyard2-1.9]$ make
[[email protected] barnyard2-1.9]$ sudo make install

0x03 安装Suricata


安装过程如下:

Suricata需要依赖yaml,首先安装yaml

[[email protected] ids]$ tar zxvf yaml-0.1.4.tar.gz
[[email protected] ids]$ cd yaml-0.1.4
[[email protected] yaml-0.1.4]$ ./configure
[[email protected] yaml-0.1.4]$ make
[[email protected] yaml-0.1.4]$ sudo make install

[[email protected] ids]$ tar zxvf suricata-1.1.1.tar.gz
[[email protected] ids]$ cd suricata-1.1.1
[[email protected] suricata-1.1.1]$ ./configure
[[email protected] suricata-1.1.1]$ make
[[email protected] suricata-1.1.1]$ sudo make install

0x04 配置Suricata、Barnyard 2


配置Barnyard 2

把Barnyard 2安装源文件中的etc/barnyard2.conf文件拷贝到Suricata的配置目录下

[[email protected] ids]$ cd barnyard2-1.9
[[email protected] barnyard2-1.9]$ sudo cp etc/barnyard2.conf /etc/suricata/

创建barnyard2日志目录/var/log/barnyard2

[[email protected] ~]$ sudo mkdir /var/log/barnyard2

配置数据库

需要创建数据库和相应的账号

[[email protected] ~]$ mysql -uroot –p
mysql> create database ids;
mysql> grant create,select,update,insert,delete on ids.* to [email protected] identified by 'ids123';

Barnyard 2安装源文件中的schemas/create_mysql是创建表的sql文件,通过如下方式建表:

[[email protected] ~]$ mysql -uids -p -Dids < ids/barnyard2-1.9/schemas/create_mysql

配置Suricata

创建Suricata配置目录和日志目录

[[email protected] ~]$ sudo mkdir /var/log/suricata
[[email protected] ~]$ sudo mkdir /etc/suricata

把规则文件拷贝到Suricata配置目录下

[[email protected] ids]$ tar zxvf emerging.rules.tar.gz
[[email protected] ids]$ sudo cp -R rules/ /etc/suricata/

把Suricata安装源文件中的suricata.yaml/classification.config/reference.config文件拷贝到Suricata的配置目录下

[[email protected] ids]$ cd suricata-1.1.1
[[email protected] suricata-1.1.1]$ sudo cp suricata.yaml classification.config reference.config /etc/suricata/

编辑barnyard2.conf文件

[[email protected] ~]$ cd /etc/suricata/
[[email protected] suricata]$ sudo vim barnyard2.conf

找到下面的内容

config reference_file:      /etc/snort/reference.config
config classification_file: /etc/snort/classification.config
config gen_file:            /etc/snort/gen-msg.map
config sid_file:                /etc/snort/sid-msg.map

更改为的内容如下:

config reference_file:      /etc/suricata/reference.config
config classification_file: /etc/suricata/classification.config
config gen_file:            /etc/suricata/rules/gen-msg.map
config sid_file:            /etc/suricata/rules/sid-msg.map

同时在文件的末尾添加如下行,红色的mysql数据库、账号信息根据实际情况填写

output database: log, mysql, user=ids password=ids123 dbname=ids host=localhost

编辑suricata.yaml文件

[[email protected] suricata]$ sudo vim suricata.yaml

找到

HOME_NET: "[192.168.0.0/16,10.0.0.0/8,172.16.0.0/12]"

这一行,根据实际的网络情况来修改,在这里我修改为

HOME_NET: "[192.168.0.0/16]"

找到下面的内容:

host-os-policy:
  # Make the default policy windows.
  windows: [0.0.0.0/0]
  bsd: []
  bsd_right: []
  old_linux: []
  linux: [10.0.0.0/8, 192.168.1.100, "8762:2352:6241:7245:E000:0000:0000:0000"]
  old_solaris: []
  solaris: ["::1"]
  hpux10: []
  hpux11: []
  irix: []
  macos: []
  vista: []
  windows2k3: []

根据实际网络情况修改。

启动Suricata、Barnyard 2

[[email protected] ~]$ sudo /usr/local/bin/barnyard2 -c /etc/suricata/barnyard2.conf -d /var/log/suricata -f unified2.alert -w /var/log/suricata/suricata.waldo -D
[[email protected] ~]$ sudo /usr/local/bin/suricata -c /etc/suricata/suricata.yaml -i eth1 -D

启动suricata的-i参数是镜像流量的网卡。

测试suricata工作是否正常,可以通过如下命令:

[[email protected] suricata]$ curl www.testmyids.com

执行后,/var/log/suricata目录下的fast.log/suricata.waldo/unified2.alert*文件大小发生变化,同时查看fast.log文件有如下类似的内容则表示suricata工作正常:

01/12/2012-02:16:27.964981  [**] [1:2013028:3] ET POLICY curl User-Agent Outbound [**] [Classification: Attempted Informa
tion Leak] [Priority: 2] {TCP} 192.168.230.100:56260 -> 217.160.51.31:80
01/12/2012-02:16:28.309707  [**] [1:2100498:7] GPL ATTACK_RESPONSE id check returned root [**] [Classification: Potential
ly Bad Traffic] [Priority: 2] {TCP} 217.160.51.31:80 -> 192.168.230.100:56260

0x05 配置Base


Base需要用到adodb以及Image_Canvas、Image_Graph绘图组件,配置过程如下:

解压adodb514.zip

[[email protected] ids]$ unzip adodb514.zip

把adodb5拷贝到/usr/local/lib/目录下,这个目录随意指定,记下来后面要用到

[[email protected] ids]$ sudo cp -R adodb5 /usr/local/lib/

安装Image_Canvas、Image_Graph

[[email protected] ids]$ sudo pear install Image_Canvas-0.3.3.tgz
[[email protected] ids]$ sudo pear install Image_Graph-0.8.0.tgz 

解压base-1.4.5.tar.gz

[[email protected] ids]$ tar zxvf base-1.4.5.tar.gz

拷贝base-1.4.5到/var/www/html目录下

[[email protected] ids]$ sudo cp -R base-1.4.5 /var/www/html/base

更改/var/www/html/base的属主为apache

[[email protected] ids]$ cd /var/www/html/
[[email protected] html]$ sudo chown -R apache:apache base

然后通过浏览器访问http://192.168.230.100/base

enter image description here

根据页面中红色的部分提示来进行操作。

修改php.ini

[[email protected] html]$ sudo vim /etc/php.ini

找到

error_reporting = E_ALL & ~E_DEPRECATED

内容,修改为如下:

error_reporting = E_ALL & ~E_DEPRECATED & ~E_NOTICE

重新载入apache配置

[[email protected] html]$ sudo /etc/init.d/httpd reload

然后点击“Continue”到下一步  enter image description here

选择语言,和前面我们的adodb5的路径,然后点击“Continue”  enter image description here

填写mysql相关信息,点击“Continue”继续  enter image description here

填写认证的相关信息,如果需要验证身份,请勾上“Use Authentication System”,点击“Continue”  enter link description here

点击“Create BASE AG”  enter image description here

点击“step 5”,跳到首页。

enter image description here

0x06 最后


以上是整个安装过程,IDS的价值在于规则设置的是否合适,根据实际情况设置合适的规则才能够体现IDS的强大。规则的设置见以后的文章。

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