Linux的系统安全设置Shell脚本

#!/bin/sh
# desc: setup linux system security
# powered by www.lvtao.net
#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  ,passwd unlock time  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  minite auto logout
echo "TMOUT=300" >>/etc/profile
 
# will system save history command list to
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  /bin/ping
chmod  /usr/bin/finger
chmod  /usr/bin/who
chmod  /usr/bin/w
chmod  /usr/bin/locate
chmod  /usr/bin/whereis
chmod  /sbin/ifconfig
chmod  /usr/bin/pico
chmod  /bin/vi
chmod  /usr/bin/which
chmod  /usr/bin/gcc
chmod  /usr/bin/make
chmod  /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

执行sh security.sh