Linux系統安全Shell第二版

本Linux Shell腳本是第二次更新，已經大量應用在某大型媒體網站體系中，加入了之前沒有想到的一些安全設置。使用方法將其復制，保存為一個shell文件，比如security.sh.將其上傳到linux服務器上，執行sh security.sh，就可以使用該腳本了！

#!/bin/sh 
# desc: setup linux system security 
# author:coralzd 
# powered by www.freebsdsystem.org 
# version 0.1.2 written by 2011.05.03 
#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.so\nauth       required       pam_tally.so  onerr=fail deny=3 unlock_time=300\nauth           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