linux系统安全shell脚本第二版

#!/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