构建小型的入侵检测系统(RedHat9)
Snort Apache PHP4 MySQL Acid
一.系统平台
Redhat9.0发行版, 安装gcc 及相关库文件,建议不要安装
Apache,PHP,MySQL,我们将用源码编译安装。基于安全方面的
考虑,可以设置一下iptables只允许SSH和WWW访问。
二.软件
MySQL4.0.12 http://
mysql.secsup.org
Snort2.0.0
http://www.snort.org Apache2.0.45
http://www.apache.org PHP4.3.1
http://www.php.net ADODBv3.30
http://phplens.com Acid0.9.6b23
http://acidlab.sourceforge.net Zlib1.1.4
http://flow.dl.sourceforge.net JPGraph1.11
http://jpgraph.techuk.com LibPcap0.7.2
http://www.tcpdump.org 建议到这个站点下载
http://ftp.cdut.edu.cn/pub/linux/NEW/ 也可以到
http://www.rpmfind.com下载相关的xx.src.rpm编译安装。如若安装了rpm包,可以强行将其反安装
rpm -e -nodeps xx.xx
三.安装(建议将所有的包文件考到同一目录)
1.安装zlib1.1.4
tar -xzvf zlib-xx.tar.gz
cd zlib-xx
./configure;make test
make install
cd ..
2.安装LibPcap0.7.2
tar -xzvf libpcap.tar.gz
cd libpcap-xx
./configure
make
make install
cd ..
3.安装MySQL4.0.12
3.1创建
mysql组和
mysql用户
groupadd
mysql useradd -g
mysql mysql 修改/root下的.bash_profile的这一行:
PATH=?$PATH:?$HOME/bin 为
PATH=?$PATH:?$HOME/bin:/usr/local/
mysql/bin
3.2安装
mysql tar -xzvf
mysql-xx.tar.gz
cd
mysql-xx
./configure --prefix=/usr/local/
mysql make
make install
cd scripts
./
mysql_install_db
chown -R root /usr/local/
mysql chown -R
mysql /usr/local/
mysql/var
chgrp -R
mysql /usr/local/
mysql cd ../support-files/my-medium.cnf /etc/my.cnf
向/etc/ld.so.conf中加入两行:/usr/local/
mysql/lib/
mysql /usr/local/lib
载入库,执行
ldconfig -v
3.3测试
mysql是否工作:
cd /usr/local/
mysql/bin/
./
mysqld_safe --user=
mysql&;amp;
#ps -ef │grep
mysql 看
mysql_safe是否工作
3.4设置
mysql为自启动:
将
mysql安装目录下的support-files目录中的
mysql.server文件拷到/etc/init.d目录
cp
mysql.server /etc/init.d/
mysql chmod 755 /etc/init.d/
mysql 创建硬链接:
cd /etc/rc3.d(文本方式启动)
ln -s /etc/init.d/
mysql S85
mysql ln -s /etc/init.d/
mysql K85
mysql cd /etc/rc5.d (图形方式启动)
ln -s /etc/init.d/
mysql S85
mysql ln -s /etc/init.d/
mysql K85
mysql 4.安装Apache2.0.45和PHP4.3.1
tar -zxvf httpd-2.0.xx.tar.gz
cd httpd_2.xx.xx
./configure --prefix=/www --enable-so
注:apache根目录为 /www
make
make install
cd ..
tar -zxvf php-4.3.x.tar.gz
cd php-4.3.x
./configure --prefix=/www/php --with-apxs2=/www/bin/apxs --with-config- filepath=/www/php --enable-sockets --with-
mysql=/usr/local/
mysql --with-zlibdir=/
usr/local --with- gd
注意:这些为一行,中间不要有回车。
cp php.ini-dist /www/php/php.ini
编辑httpd.conf(/www/conf):
加入两行
LoadModule php4_module modules/libphp4.so
AddType application/x-httpd-php .php
httpd.conf中相关内容如下:
#
# LoadModule foo_module modules/mod_foo.so
LoadModule php4_module modules/libphp4.so
# AddType allows you to tweak mime.types without actually editing it, or ?$
# make certain files to be certain types.
#
AddType application/x-tar .tgz
AddType image/x- icon .ico
AddType application/x-httpd-php .php
设置Apache为自启动:
cp /www/bin/apachectl /etc/init.d/httpd
cd /etc/rc3.d
ln -s /etc/init.d/httpd S85httpd
ln -s /etc/init.d/httpd K85httpd
cd /etc/rc5.d
ln -s /etc/init.d/httpd S85httpd
ln -s /etc/init.d/httpd K85httpd
测试一下 PHP:
cd /etc/init.d
./httpd start
在/www/htdocs下建立文件 test.php
cd /www/htdocs
vi test.php
加入
lt;?php
hpinfo();
?>
用浏览器访问
http://IP_address/test.php,成功的话,出现一些
系统,apache,php信息
[color=#FFFFFF'][/color]
5.安装 Snort2.0
5.1建立snort配置文件和日志目录
mkdir /etc/snort
mkdir /var/log/snort
tar -zxvf snort-2.x.x.tar.gz
cd snort-2.x.x
./configure --with-
mysql=/usr/local/
mysql make
make install
5.2安装规则和配置文件
cd rules (在snort安装目录下)
cp * /etc/snort
cd ../etc
cp snort.conf /etc/snort
cp *.config /etc/snort
5.3修改snort.conf(/etc/snort/snort.conf)
var HOME_NET 10.2.2.0/24 (修改为你的内部网网络地址,我的是
192.168.0.0/24)
var RULE_PATH ../rules 修改为 var RULE_PATH /etc/snort/
改变记录日志数据库:
output database: log,
mysql, user=root password=your_password
dbname=snort host=localhost
5.4设置snort为自启动:
在snort安装目录下
cd /contrib
cp S99snort /etc/init.d/snort
vi /etc/init.d/snort
修改snort如下:
[color=#FFFFFF'][/color]
CONFIG=/etc/snort/snort.conf
#SNORT_GID=nogroup (注释掉)
#8194;$SNORT_PATH/snort -c ?$CONFIG -i ?$IFACE ?$OPTIONS
(去掉原文件中的 -g ?$SNORT_GID )
chmod 755 /etc/init.d/snort
cd /etc/rc3.d
ln -s /etc/init.d/snort S99snort
ln -s /etc/init.d/snort K99snort
cd /etc/rc5.d
ln -s /etc/init.d/snort S99snort
ln -s /etc/init.d/snort K99snort
四.在
mysql中建立数据库
/usr/local/
mysql/bin/
mysql mysql> SET PASSWORD FOR root@localhost=PASSWORD('your_password');
mysql> create database snort;
mysql> grant INSERT,SELECT on root.* to snort@localhost;
mysql> quit;
进入snort安装目录:/usr/local/
mysql/bin/
mysql -p <./contrib/create_
mysql snort
gt;Enter password:
安装DB表:(在contrib目录)
zcat snortdb-extra.gz │ /usr/local/
mysql/bin/
mysql -p snort
进入
mysql数据库,看看snort数据库中的表:
/usr/local/
mysql/bin/
mysql -p
gt;Enter password:
mysql> show databases;
------------
│ Database
------------
│
mysql │ snort
│ test
------------
3 rows in set (0.00 sec)
mysql> use snort;
mysql> show tables; 将会有这些:
------------------
│ Tables_in_snort │
------------------
│ data
│ detail
│ encoding
│ event
│ flags
│ icmphdr
│ iphdr
│ opt
│ protocols
│ reference
│ reference_system
schema
│ sensor
│ services
│ sig_class
│ sig_reference
│ signature
│ tcphdr
│ udphdr
------------------
19 rows in set (0.00 sec)
mysql> exit
五.安装配置Web接口
安装JPGraph1.11
cp jpgraph-1.11.tar.gz /www/htdocs
cd /www/htdocs
tar -xzvf jpgraph-1.xx.tar.gz
rm -rf jpgrap-1.xx.tar.gz
cd jpgraph-1.11
rm -rf README
rm -rf QPL.txt
安装ADODB:
cp adodb330.tgz /www/htdocs/
cd /www/htdocs
tar -xzvf adodb330.tgz
rm -rf adodb330.tgz
安装配置Acid:
cp acid-0.0.6b23.tar.gz /www/htdocs
cd /www/htdocs
tar -xvzf acid-0.9.6b23.tar.gz
rm -rf acid-0.9.6b23.tar.gz
cd /www/htodcs/acid/
编辑acid_conf.php,修改相关配置如下:
#8194;$DBlib_path = "/www/htdocs/adodb";
/* The type of underlying alert database
*
* MySQL : "
mysql"
* PostgresSQL : "postgres"
* MS SQL Server : "mssql"
*/
#8194;$DBtype = "
mysql";
/* Alert DB connection parameters
* - ?$alert_dbname : MySQL database name of Snort alert DB
* - ?$alert_host : host on which the DB is stored
* - ?$alert_port : port on which to access the DB
* - ?$alert_user : login to the database with this user
* - ?$alert_password : password of the DB user
*
* This information can be gleaned from the Snort database
* output plugin configuration.
*/
#8194;$alert_dbname = "snort";
#8194;$alert_host = "localhost";
#8194;$alert_port = "";
#8194;$alert_user = "root";
#8194;$alert_password = "Your_Password";
/* Archive DB connection parameters */
#8194;$archive_dbname = "snort";
#8194;$archive_host = "localhost";
#8194;$archive_port = "";
#8194;$archive_user = "root";
#8194;$archive_password = "Your_Password ";
And a little further down
#8194;$ChartLib_path = "/www/htdocs/jpgraph-1.11/src";
/* File format of charts ('png', 'jpeg', 'gif') */
#8194;$chart_file_format = "png";
进入web界面:
http://yourhost/acid/acid_main.php 点"Setup Page"链接 -> Create Acid AG
访问
http://yourhost/acid将会看到ACID界面。
六.测试系统
重启系统或者直接启动相关后台程序:
/etc/init.d/
mysql restart
/etc/init.d/snort start
/etc/init.d/httpd start
利用nmap,nessus,CIS或者X-scan对系统进行扫描,
产生告警纪录。
http://yourhost/acid 察看纪录。
至此,一个功能强大的IDS配置完毕。各位可以利用web界面
远程登陆,监控主机所处局域网,同时安装phpMyAdmin对
mysql 数据库进行操控。