简单使用epel源来安装NTOP和chkrootkit
首先来说一下epel源是什么：
如果既想获得 RHEL 的高质量、高性能、高可靠性，又需要方便易用(关键是免费)的软件包更新功能，那么 Fedora Project 推出的 EPEL(Extra Packages for Enterprise Linux)正好适合你。EPEL(http://fedoraproject.org/wiki/EPEL) 是由 Fedora 社区打造，为 RHEL 及衍生发行版如 CentOS、Scientific Linux 等提供高质量软件包的项目。
下面来配置一下epel源
所使用的系统是Centos 6.3 x86_64 ip 192.168.112.129
在安装之前要事先安装yum-priorities
# yum install -y yum-priorities
安装完成后，便可以配置epel源了
由于使用的是64位的系统，所以选择安装相对应的rpm包
可以在http://dl.fedoraproject.org/pub/epel/6/x86_64/这里面到找，执行下面的命令安装
[root@www yum.repos.d]# rpm -ivh http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm
Retrieving http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm
warning: /var/tmp/rpm-tmp.KQrxb7: Header V3 RSA/SHA256 Signature, key ID 0608b895: NOKEY
Preparing... ########################################### [100%]
1:epel-release ########################################### [100%]
对于32位的系统则需要执行下面的命令：
rpm -ivh http://dl.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm
安装完成后导入DAG的PGP Key
[root@www yum.repos.d]# rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-6
然后再来设置/etc/yum.repos.d/epel.repo文件中源的级别，添加priority=11 (将其级别设置为较低级别，这样系统安装软件时会首先选择官方yum源，如果实在找不到它会选择epel源）/etc/yum.repos.d/epel.repo文件内容如下：
[root@www yum.repos.d]# cat epel.repo
[epel]
name=Extra Packages for Enterprise Linux 6 - $basearch
#baseurl=http://download.fedoraproject.org/pub/epel/6/$basearch
mirrorlist=https://mirrors.fedoraproject.org/metalink?repo=epel-6&arch=$basearch
failovermethod=priority
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-6
priority=11 \\设置优先级
[epel-debuginfo]
name=Extra Packages for Enterprise Linux 6 - $basearch - Debug
#baseurl=http://download.fedoraproject.org/pub/epel/6/$basearch/debug
mirrorlist=https://mirrors.fedoraproject.org/metalink?repo=epel-debug-6&arch=$basearch
enabled=0
[epel-source]
name=Extra Packages for Enterprise Linux 6 - $basearch - Source
#baseurl=http://download.fedoraproject.org/pub/epel/6/SRPMS
mirrorlist=https://mirrors.fedoraproject.org/metalink?repo=epel-source-6&arch=$basearch
设置安装完成后就可以直接用yum安装NTOP了
[root@www yum.repos.d]# yum install ntop
Loaded plugins: fastestmirror, priorities
Loading mirror speeds from cached hostfile
epel/metalink | 4.0 kB 00:00
* base: centos.ustc.edu.cn
* epel: ftp.cuhk.edu.hk
* extras: centos.ustc.edu.cn
* updates: centos.ustc.edu.cn
epel | 4.2 kB 00:00
http://ftp.cuhk.edu.hk/pub/linux/fedora-epel/6/x86_64/repodata/e7f018b8041d9c4926b9587c3e1f50111f7d76a57335cc72a7106fb703eca514-primary.sqlite.bz2: [Errno 14] PYCURL ERROR 7 - "couldn't connect to host"
Trying other mirror.
epel/primary_db | 5.0 MB 00:05
73 packages excluded due to repository priority protections
Setting up Install Process
Resolving Dependencies
--> Running transaction check
---> Package ntop.x86_64 0:5.0-5.el6 will be installed
--> Processing Dependency: graphviz for package: ntop-5.0-5.el6.x86_64
--> Processing Dependency: libpcap.so.1()(64bit) for package: ntop-5.0-5.el6.x86_64
--> Processing Dependency: libGeoIP.so.1()(64bit) for package: ntop-5.0-5.el6.x86_64
---> Package GeoIP.x86_64 0:1.4.8-1.el6 will be installed
---> Package graphviz.x86_64 0:2.26.0-10.el6 will be installed
--> Processing Dependency: urw-fonts for package: graphviz-2.26.0-10.el6.x86_64
--> Processing Dependency: libXmu.so.6()(64bit) for package: graphviz-2.26.0-10.el6.x86_64
--> Processing Dependency: libXaw.so.7()(64bit) for package: graphviz-2.26.0-10.el6.x86_64
---> Package libpcap.x86_64 14:1.0.0-6.20091201git117cb5.el6 will be installed
---> Package libXaw.x86_64 0:1.0.11-2.el6 will be installed
---> Package libXmu.x86_64 0:1.1.1-2.el6 will be installed
---> Package urw-fonts.noarch 0:2.4-10.el6 will be installed
--> Finished Dependency Resolution
Dependencies Resolved
=======================================================================================================================================================================
Package Arch Version Repository Size
Installing:
ntop x86_64 5.0-5.el6 epel 12 M
Installing for dependencies:
GeoIP x86_64 1.4.8-1.el6 epel 620 k
graphviz x86_64 2.26.0-10.el6 base 1.0 M
libXaw x86_64 1.0.11-2.el6 base 178 k
libXmu x86_64 1.1.1-2.el6 base 66 k
libpcap x86_64 14:1.0.0-6.20091201git117cb5.el6 base 126 k
urw-fonts noarch 2.4-10.el6 base 3.1 M
Transaction Summary
安装完成后就可以启动NTOP了，启动过程会提示调置admin用户的密码。
[root@www yum.repos.d]# ntop
Sun Mar 24 04:09:27 2013 Initializing gdbm databases
Sun Mar 24 04:09:27 2013 ntop will be started as user ntop
Sun Mar 24 04:09:27 2013 ntop v.5.0 Fedora RPM (64 bit)
Sun Mar 24 04:09:27 2013 Configured on Nov 26 2012 2:27:02, built on Nov 26 2012 02:27:07.
……
ntop startup - waiting for user response!
Please enter the password for the admin user:
最后就可以在浏览器中访问了 http://192.168.112.129:3000
如图所示工作界面：
<a href="http://blog.51cto.com/attachment/201304/231549987.jpg" target="_blank"></a>
到此 使用epel源安装NTOP就完成了，具体关于NTOP的使用，还在熟悉过程中。
下面来说一下chkrootkit的安装
先来认识一下chkrootkit。Rootkit检测工具Chkrootkit
Rootkit是单个或一组软件，它针对一个或者多个弱点进行获取正式权限的攻击，或者对目标主机进行其他任何类型的攻击。很多Rootkit不仅仅是发起一个攻击以获得root权限，其同时还试图掩藏和清除攻击的行为。为了达到掩盖的目的，它们删除日志文件、安装特洛伊木马或采取其他的掩盖方法。就像网络中别的攻击一样，Rootkit通常也具有特征并且会留下一些蛛丝马迹，这些都是可以用来识别出它们。我们这里有专门的软件可对Rootkit的踪迹和特征进行查找，其中之一就是chkrootkit
Chkrootkit的安装
Chkrootkit目前的最新版本是0.49，而epel源中的Chkrootkit正好的就是最新版本。由于前面已经配置好了epel源就可以直接安装了：
# yum install -y chkrootkit
成功安装后，再用rpm命令来检查一下，如下所示：
[root@www ~]# rpm -ql chkrootkit
/etc/pam.d/chkrootkit
/etc/security/console.apps/chkrootkit
/usr/bin/chkrootkit
/usr/bin/chkrootkitX
/usr/lib64/chkrootkit-0.49
/usr/lib64/chkrootkit-0.49/check_wtmpx
/usr/lib64/chkrootkit-0.49/chkdirs
/usr/lib64/chkrootkit-0.49/chklastlog
/usr/lib64/chkrootkit-0.49/chkproc
/usr/lib64/chkrootkit-0.49/chkrootkit
/usr/lib64/chkrootkit-0.49/chkutmp
/usr/lib64/chkrootkit-0.49/chkwtmp
/usr/lib64/chkrootkit-0.49/ifpromisc
/usr/lib64/chkrootkit-0.49/strings
/usr/lib64/chkrootkit-0.49/strings-static
/usr/sbin/chkrootkit
/usr/share/applications/fedora-chkrootkit.desktop
/usr/share/doc/chkrootkit-0.49
/usr/share/doc/chkrootkit-0.49/ACKNOWLEDGMENTS
/usr/share/doc/chkrootkit-0.49/COPYRIGHT
/usr/share/doc/chkrootkit-0.49/README
/usr/share/doc/chkrootkit-0.49/README.chklastlog
/usr/share/doc/chkrootkit-0.49/README.chkwtmp
/usr/share/doc/chkrootkit-0.49/README.false_positives
/usr/share/doc/chkrootkit-0.49/chkrootkit.lsm
/usr/share/pixmaps/chkrootkit.png
这里显示的是成功安装后Chkrootkit后的相关文件。运行相关命令可以查看版本号：
[root@www ~]# chkrootkit -V
chkrootkit version 0.49
安装后就可以运行了
[root@www ~]# chkrootkit
ROOTDIR is `/'
Checking `amd'... not found
Checking `basename'... not infected
Checking `biff'... not found
Checking `chfn'... not infected
Checking `chsh'... not infected
Checking `cron'... not infected
Checking `crontab'... not infected
Checking `date'... not infected
Checking `du'... not infected
Checking `dirname'... not infected
Checking `echo'... not infected
Checking `egrep'... not infected
Checking `env'... not infected
Checking `find'... not infected
Checking `fingerd'... not found
Checking `gpm'... not found
Checking `grep'... not infected
Checking `hdparm'... not found
Checking `su'... not infected
Checking `ifconfig'... not infected
Checking `inetd'... not found
Checking `inetdconf'... not found
Checking `identd'... not found
Checking `init'... not infected
Checking `killall'... not infected
Checking `ldsopreload'... not infected
Checking `login'... not infected
Checking `ls'... not infected
Checking `lsof'... not found
Checking `mail'... not found
Checking `mingetty'... not infected
Checking `netstat'... not infected
Checking `named'... not found
Checking `passwd'... not infected
Checking `pidof'... not infected
Checking `pop2'... not found
Checking `pop3'... not found
Checking `ps'... not infected
Checking `pstree'... not infected
Checking `rpcinfo'... not found
Checking `rlogind'... not found
Checking `rshd'... not found
Checking `slogin'... not found
Checking `sendmail'... not infected
Checking `sshd'... not infected
Checking `syslogd'... not tested
Checking `tar'... not infected
Checking `tcpd'... not infected
Checking `tcpdump'... not infected
Checking `top'... not infected
Checking `telnetd'... not found
Checking `timed'... not found
Checking `traceroute'... not found
Checking `vdir'... not infected
Checking `w'... not infected
Checking `write'... not infected
Checking `aliens'... no suspect files
Searching for sniffer's logs, it may take a while... nothing found
Searching for HiDrootkit's default dir... nothing found
Searching for t0rn's default files and dirs... nothing found
Searching for t0rn's v8 defaults... nothing found
Searching for Lion Worm default files and dirs... nothing found
Searching for RSHA's default files and dir... nothing found
Searching for RH-Sharpe's default files... nothing found
Searching for Ambient's rootkit (ark) default files and dirs... nothing found
Searching for suspicious files and dirs, it may take a while... nothing found
Searching for LPD Worm files and dirs... nothing found
Searching for Ramen Worm files and dirs... nothing found
Searching for Maniac files and dirs... nothing found
Searching for RK17 files and dirs... nothing found
Searching for Ducoci rootkit... nothing found
Searching for Adore Worm... nothing found
Searching for ShitC Worm... nothing found
Searching for Omega Worm... nothing found
Searching for Sadmind/IIS Worm... nothing found
Searching for MonKit... nothing found
Searching for Showtee... nothing found
Searching for OpticKit... nothing found
Searching for T.R.K... nothing found
Searching for Mithra... nothing found
Searching for LOC rootkit... nothing found
Searching for Romanian rootkit... nothing found
Searching for HKRK rootkit... nothing found
Searching for Suckit rootkit... nothing found
Searching for Volc rootkit... nothing found
Searching for Gold2 rootkit... nothing found
Searching for TC2 Worm default files and dirs... nothing found
Searching for Anonoying rootkit default files and dirs... nothing found
Searching for ZK rootkit default files and dirs... nothing found
Searching for ShKit rootkit default files and dirs... nothing found
Searching for AjaKit rootkit default files and dirs... nothing found
Searching for zaRwT rootkit default files and dirs... nothing found
Searching for Madalin rootkit default files... nothing found
Searching for Fu rootkit default files... nothing found
Searching for ESRK rootkit default files... nothing found
Searching for rootedoor... nothing found
Searching for ENYELKM rootkit default files... nothing found
Searching for common ssh-scanners default files... nothing found
Searching for anomalies in shell history files... nothing found
Checking `asp'... not infected
Checking `bindshell'... not infected
Checking `lkm'... chkproc: nothing detected
chkdirs: nothing detected
Checking `rexedcs'... not found
Checking `sniffer'... eth0: PF_PACKET(/sbin/dhclient, /usr/sbin/ntop)
Checking `w55808'... not infected
Checking `wted'... chkwtmp: nothing deleted
Checking `scalper'... not infected
Checking `slapper'... not infected
Checking `z2'... chklastlog: nothing deleted
Checking `chkutmp'... chkutmp: nothing deleted
Checking `OSX_RSPLUG'... not infected
Chkrootkit会对系统上的重要文件进行扫描，以上结果显示是正常的，一般是没有文件感染，如果Chkrootkit显示有文件感染，请认真查看是否是误报，如果有文件感染了Rootkit，请立即从网络上断开你的服务，同时采取措施进行Rootkit的清理。
好了，到此关于epel源的配置和使用epel源安装软件介绍完毕。
不对之处请大家指出，谢谢关注。
本文转自 ZhouLS 51CTO博客，原文链接:http://blog.51cto.com/zhou123/1181062
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