linux服务器安全加固shell脚本

linux服务器安全加固shell脚本
  #!/bin/sh

    # desc: setup linux system security

    # author:skykws

    # powered by www.16safe.com

    # version 0.1.2 written by 2014.10.28

    #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 nerr=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