我们将常用的系统安全配置制作为一个shell脚本，只需要在服务器上运行这个shell脚本即可完成安全设置。

linux的系统安全设 置Shell脚本是第二次更新，已经大量应用在某大型媒体网站体系中，加入了之前没有想到的一些安全设置。使用方法将其复制，保存为一个shell文件， 比如security.sh.将其上传到Linux服务器上，执行sh security.sh，就可以使用该脚本了！

复制代码 代码如下:#!/bin/sh

# desc: setup linux system security

#account setup

passwd -l xfs

passwd -l news

passwd -l nscd

passwd -l dbus

passwd -l vcsa

passwd -l games

passwd -l nobody

passwd -l avahi

passwd -l haldaemon

passwd -l gopher

passwd -l ftp

passwd -l mailnull

passwd -l pcap

passwd -l mail

passwd -l shutdown

passwd -l halt

passwd -l uucp

passwd -l operator

passwd -l sync

passwd -l adm

passwd -l lp

# chattr /etc/passwd /etc/shadow

chattr +i /etc/passwd

chattr +i /etc/shadow

chattr +i /etc/group

chattr +i /etc/gshadow

# add continue input failure 3 ,passwd unlock time 5 minite

sed -i 's#auth required pam_env.so#auth required pam_env.sonauth required pam_tally.so onerr=fail deny=3 unlock_time=300nauth required /lib/security/$ISA/pam_tally.so onerr=fail deny=3 unlock_time=300#' /etc/pam.d/system-auth

# system timeout 5 minite auto logout

echo "TMOUT=300" >>/etc/profile

# will system save history command list to 10

sed -i "s/HISTSIZE=1000/HISTSIZE=10/" /etc/profile

# enable /etc/profile go!

source /etc/profile

# add syncookie enable /etc/sysctl.conf

echo "net.ipv4.tcp_syncookies=1" >> /etc/sysctl.conf

sysctl -p # exec sysctl.conf enable

# optimizer sshd_config

sed -i "s/#MaxAuthTries 6/MaxAuthTries 6/" /etc/ssh/sshd_config

sed -i "s/#UseDNS yes/UseDNS no/" /etc/ssh/sshd_config

# limit chmod important commands

chmod 700 /bin/ping

chmod 700 /usr/bin/finger

chmod 700 /usr/bin/who

chmod 700 /usr/bin/w

chmod 700 /usr/bin/locate

chmod 700 /usr/bin/whereis

chmod 700 /sbin/ifconfig

chmod 700 /usr/bin/pico

chmod 700 /bin/vi

chmod 700 /usr/bin/which

chmod 700 /usr/bin/gcc

chmod 700 /usr/bin/make

chmod 700 /bin/rpm

# history security

chattr +a /root/.bash_history

chattr +i /root/.bash_history

# write important command md5

cat > list << "EOF" && /bin/ping /bin/finger /usr/bin/who /usr/bin/w /usr/bin/locate /usr/bin/whereis /sbin/ifconfig /bin/pico /bin/vi /usr/bin/vim /usr/bin/which /usr/bin/gcc /usr/bin/make /bin/rpm EOF for i in `cat list` do if [ ! -x $i ];then echo "$i not found,no md5sum!" else md5sum $i >> /var/log/`hostname`.log

fi

done

rm -f list