月度归档：2011年11月

ossim记录

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静下心来想想，感觉刚开始分析的方向就是错的，转而从ossim官方下载了手册通读了一遍，梳理了下日志处理流程。

ossec-agent->ossec-server->写日志到/var/ossec/logs/alert/alerts.log->ossim-agent读取日志->匹配规则发送给ossim-server

应该出在ossim-agent端匹配日志规则上，看了下ossec的插件/etc/ossim/agent/plugins/ossec.cfg，发现1111行

[OSSEC – Windows Security audit – Logged on/off]应该就是匹配这个规则

看了下regexp，和日志匹配是正确的，很奇怪，然后再看看日志web管理端，username和userdata1的值都能获取到，于是把

src_ip改成$user，获取username，重启agent /etc/init.d/ossim-agent restart

从新登陆系统产生一个事件，查看后居然src_ip还是0.0.0.0，费解了，难道不是匹配的这条规则？

一想干脆粗暴点，打开ossec.cfg把所有src_ip都改成$user，重启agent，我靠，终于变了，肉流满面。然后逐个修改，最后定为到匹配的规则是[OSSEC -zzz- Generic Rule]

regexp=”Alert.*\n(?P<date_header>\d+\s+\w+\s+\d+\s+\d+:\d+:\d+)\s($(?P<agent_name>.*)$\s)?(?P<agent_ip>.*)->.*\nRule:\s+(?P<sid>\d+).*\'(?P<msg>.*)\’\nSrc\sIP:\s(?P<sip>.*)\nUser:\s(?P<user>.*)\n(?P<data>.*)\n”src_ip={$sip}

再看看ossec的日志

** Alert 1317615907.709569: – windows,authentication_success,

2011 Oct 03 12:25:07 (10.135.15.201) 10.135.15.201->WinEvtLog

Rule: 18107 (level 3) -> ‘Windows Logon Success.’

Src IP: (none)

User: Administrator

WinEvtLog: Security: AUDIT_SUCCESS(528):

居然是none。。然是none。。是none。。none。。。。。。。。

还好[OSSEC -zzz- Generic Rule]能获取到agent_ip

修改srp_ip={resolv($agent_ip)}，重启agent，终于正常了

src_ip改成$user，获取username，重启agent /etc/init.d/ossim-agent restart

从新登陆系统产生一个事件，查看后居然src_ip还是0.0.0.0，费解了，难道不是匹配的这条规则？

再看看ossec的日志

** Alert 1317615907.709569: – windows,authentication_success,

2011 Oct 03 12:25:07 (10.135.15.201) 10.135.15.201->WinEvtLog

Rule: 18107 (level 3) -> ‘Windows Logon Success.’

Src IP: (none)

User: Administrator

WinEvtLog: Security: AUDIT_SUCCESS(528):

居然是none。。然是none。。是none。。none。。。。。。。。

还好[OSSEC -zzz- Generic Rule]能获取到agent_ip

修改srp_ip={resolv($agent_ip)}，重启agent，终于正常了

Ubuntu中命令行中文乱码解决方法

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首先…我说的命令行是指Ctrl+Alt+F1~F6开启的纯命令行模式不是在X Window里打开的终端…

如果你遇到的是终端里无法显示中文这篇文里的方法基本对你没用….可以跳过了~

言归正传纯命令行中中文无法显示

解决方法1：学好英文..把环境变量设置为英文….(别抽我..)

修改/etc/default/locale

sudo vim /etc/default/locale1

修改默认的
LANG=zh_CN.UTF-8
LANGUAGE=zh_CN:zh

为:
LANG=”en_US.UTF-8″
LANGUAGE=”en_US:en”

存盘退出

然后：

sudo reboot

再然后

env 或者 locale 查看修改后的结果就可以了…

解决方法2：这才是我想说的… 安装个zhcon就可以了…

终端或者命令行里输入

sudo apt-get install zhcon

等安装完即可~

运行的时候记得要加载vgz驱动和utf8支持否则会黑屏…

并且只能在纯命令行里运行在终端运行会出错

所以你的命令应该是zhcon –utf8 –drv=vga

如果嫌每次都要输入这么多太麻烦可以在~/.bashrc里面加一个别名

sudo vim ~/.bashrc

打开后在里面加入一行

alias zhcon=’zhcon –utf8 –drv=vga’
保存退出

这样每次进入命令行后直接运行zhcon即可不用担心黑屏问题

zhcon中支持中文显示也支持中文输入法由于热键冲突问题暂时我只知道Ctrl+ space切换到全拼输入法是

可以用的多多少少解决了点中文目录/文件名的问题了

vps性能测试

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wget https://byte-unixbench.googlecode.com/files/UnixBench5.1.3.tgz

tar zxf U

make

./Run

linux dhcp

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自己记录下，这么几个命令敲了无数遍还错，shit~~~

/etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
ONBOOT=yes
BOOTPROTO=dhcp
或者使用netconfig配置动态地址
然后运行# service network restart

centos6源及相关

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我想我是能看懂

# CentOS-Base.repo
#
# mv /etc/yum.repos.d/CentOS-Base.repo/etc/yum.repos.d/CentOS-Base.repo.bak
#yum makecache
# This file uses a new mirrorlist system developed by Lance Davis for CentOS.
# The mirror system uses the connecting IP address of the client and the
# update status of each mirror to pick mirrors that are updated to and
# geographically close to the client. You should use this for CentOS updates
# unless you are manually picking other mirrors.
#
# If the mirrorlist= does not work for you, as a fall back you can try the
# remarked out baseurl= line instead.
#
#

[base]
name=CentOS-$releasever – Base
baseurl=http://mirrors.163.com/centos/6.0/os/$basearch/
gpgcheck=1
gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-6

#released updates
[updates]
name=CentOS-$releasever – Updates
baseurl=http://mirrors.163.com/centos/6.0/updates/$basearch/
gpgcheck=1
gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-6

#packages used/produced in the build but not released
#[addons]
#name=CentOS-$releasever – Addons
#baseurl=http://mirrors.163.com/centos/$releasever/addons/$basearch/
#gpgcheck=1
#gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-6
#additional packages that may be useful
[extras]
name=CentOS-$releasever – Extras
baseurl=http://mirrors.163.com/centos/6.0/extras/$basearch/
gpgcheck=1
gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-6
#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever – Plus
baseurl=http://mirrors.163.com/centos/6.0/centosplus/$basearch/
gpgcheck=1
enabled=0
gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-6

nslookup的一些使用

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nslookup -d www.sohu.com dns.sohu.com

nslookup -qt=ns www.sohu.com dns.sohu.com

我能看懂就成了

centos换源

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以root用户进入CentOS系统。
[[email protected] ~]# cd /etc/yum.repos.d
2.备份repo
[[email protected] yum.repos.d]# mv CentOS-Base.repo  CentOS-Base.repo.bak
3.建立新的CentOS-Base.repo文件：（以CentOS 5.2为例）
[[email protected] yum.repos.d]#vi CentOS-Base.repo
内容如下（以中国科技大学的yum源为例）：
# CentOS-Base.repo
#
# This file uses a new mirrorlist system developed by Lance Davis for CentOS.
# The mirror system uses the connecting IP address of the client and the
# update status of each mirror to pick mirrors that are updated to and
# geographically close to the client.  You should use this for CentOS updates
# unless you are manually picking other mirrors.
#
# If the mirrorlist= does not work for you, as a fall back you can try the
# remarked out baseurl= line instead.
#
#

[base]
name=CentOS-$releasever - Base
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os
baseurl=http://centos.ustc.edu.cn/centos/$releasever/os/$basearch/
gpgcheck=1
gpgkey=http://centos.ustc.edu.cn/centos/RPM-GPG-KEY-CentOS-5

#released updates
[updates]
name=CentOS-$releasever - Updates
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=updates
baseurl=http://centos.ustc.edu.cn/centos/$releasever/updates/$basearch/
gpgcheck=1
gpgkey=http://centos.ustc.edu.cn/centos/RPM-GPG-KEY-CentOS-5

#packages used/produced in the build but not released
[addons]
name=CentOS-$releasever - Addons
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=addons
baseurl=http://centos.ustc.edu.cn/centos/$releasever/addons/$basearch/
gpgcheck=1
gpgkey=http://centos.ustc.edu.cn/centos/RPM-GPG-KEY-CentOS-5

#additional packages that may be useful
[extras]
name=CentOS-$releasever - Extras
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras
baseurl=http://centos.ustc.edu.cn/centos/$releasever/extras/$basearch/
gpgcheck=1
gpgkey=http://centos.ustc.edu.cn/centos/RPM-GPG-KEY-CentOS-5

#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever - Plus
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=centosplus
baseurl=http://centos.ustc.edu.cn/centos/$releasever/centosplus/$basearch/
gpgcheck=1
enabled=0
gpgkey=http://centos.ustc.edu.cn/centos/RPM-GPG-KEY-CentOS-5

zabbix分布式监控1

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闲来无聊研究下分布式监控

zabbix

这个东东~·，听说效果不错，看看说明

http://www.oschina.net/p/zabbix支持snmp管理，也支持自己的agent，

长相是这样，大家先有个笼统的印象吧

有个linux必须的我使用的是centos5.6手头有这个，折腾网弄了半天，最后dhclient好了，然后最好先yum upgrade好。悲催的，忘了改源了。

yum install yum-fastestmirror -y

希望看到这篇文章的人不要忘了这个。

1.4和1.6的都有pdf手册，为啥1.8的就要在线看呢，悲剧的。

http://www.zabbix.com/documentation.php

Name	Platform	CPU/Memory	Database	Monitored hosts
Small	Ubuntu Linux	PII 350MHz 256MB	MySQL MyISAM	20
Medium	Ubuntu Linux 64 bit	AMD Athlon 3200+ 2GB	MySQL InnoDB	500
Large	Ubuntu Linux 64 bit	Intel Dual Core 6400 4GB	RAID10 MySQL InnoDB or PostgreSQL	>1000
Very large	RedHat Enterprise	Intel Xeon 2xCPU 8GB	Fast RAID10 MySQL InnoDB or PostgreSQL	>10000