Linux基线合规检查中各文件的作用及配置脚本

1./etc/motd

操作：echo " Authorized users only. All activity may be monitored and reported " > /etc/motd

效果：telnet和ssh登录后的输出信息

2. /etc/issue和/etc/issue.net

操作：echo " Authorized users only. All activity may be monitored and reported " > /etc/issue.net

效果：telnet主机未登录时输出的信息

3./etc/syslog.conf--远程日志服务配置文件

4./etc/sysctl.conf--操作系统配置文件

5./etc/vsftpd/vsftpd.conf--vsftpd配置文件

6./etc/ssh/sshd_config--ssh配置文件

7./etc/hosts.allow和/etc/hosts.deny--服务连接白名单/黑名单文件

8./etc/pam.d/system-auth--系统登录验证配置文件

9./etc/init/control-alt-delete.conf--ctrl+alt+del快捷键启用/禁用

10./etc/profile--环境变量配置文件，通常用于配置UMASK和TMOUT

11./etc/login.defs--口令（长度及有效时长等）配置文件

12.基线合规配置脚本（IP注意修改）

MDFDATE=`date +"%Y%m%d"`

#add telnet and ssh banner
cp -p /etc/motd /etc/motd.bak${MDFDATE}
cp -p /etc/issue /etc/issue.bak${MDFDATE}
cp -p /etc/issue.net /etc/issue.net.bak${MDFDATE}
echo " Authorized users only. All activity may be monitored and reported " > /etc/motd
echo " Authorized users only. All activity may be monitored and reported " > /etc/issue
echo " Authorized users only. All activity may be monitored and reported " > /etc/issue.net
#/etc/init.d/xinetd restart

#set ftp default right
cp -p /etc/vsftpd/vsftpd.conf /etc/vsftpd/vsftpd.conf.bak${MDFDATE}
sed -i 's/#ls_recurse_enable=/ls_recurse_enable=/g' /etc/vsftpd/vsftpd.conf
echo "anon_umask=022" >> /etc/vsftpd/vsftpd.conf
#vsftpd
sed -i '/^anonymous_enable=YES/d' /etc/vsftpd/vsftpd.conf
echo 'anonymous_enable=NO' >> /etc/vsftpd/vsftpd.conf
sed -i '/^chroot_local_user=/d' /etc/vsftpd/vsftpd.conf
echo 'chroot_local_user=YES' >> /etc/vsftpd/vsftpd.conf
sed -i '/^userlist_enable=/d' /etc/vsftpd/vsftpd.conf
echo 'userlist_enable=YES' >> /etc/vsftpd/vsftpd.conf
echo 'userlist_deny=NO' >> /etc/vsftpd/vsftpd.conf
echo 'userlist_file=/etc/vsftpd/ftpuser_deny' >> /etc/vsftpd/vsftpd.conf
cat> /etc/vsftpd/ftpuser_deny << EOF
root
daemon
bin
sys
adm
lp
uucp
nuucp
listen
nobody
noaccess
nobody4
EOF

#close not need service
chkconfig cups off

#forbidden icmp redirect
cp -p /etc/sysctl.conf /etc/sysctl.conf.bak${MDFDATE}
echo "net.ipv4.conf.all.accept_redirects=0" >> /etc/sysctl.conf
#sysctl -p

#add remote log server
cp /etc/syslog.conf /etc/syslog.conf.bak${MDFDATE}
sed -i '/remote-host:514/a\*.info    @192.168.220.128' /etc/syslog.conf
echo 'auht.info       /var/log/authlog' >> /etc/syslog.conf
echo 'authpriv.*   /var/log/authlog' >> /etc/syslog.conf
echo '*.err;auth.info        /var/adm/messages' >> /etc/syslog.conf
touch /var/log/authlog
for f in `cat /etc/rsyslog.conf|grep -v "@"|grep -v "^#" |grep -v "^\$"|grep "/var" |grep -v "\-\/"|awk "{print$2}"`
do
chmod  $f
done

#forbid root romote login
cp -p /etc/ssh/sshd_config /etc/ssh/sshd_config.bak${MDFDATE}
sed -i 's/^PermitRootLogin yes/#PermitRootLogin yes/g' /etc/ssh/sshd_config
sed -i '/PermitRootLogin yes/a\PermitRootLogin no' /etc/ssh/sshd_config
#/etc/init.d/sshd restart
sed -i 's/^pts/#pts/g' /etc/securetty
#ssh banner
touch /etc/sshbanner
chown bin:bin /etc/sshbanner
chmod  /etc/sshbanner
echo " Authorized users only. All activity may be monitored and reported "   > /etc/sshbanner
echo "Banner /etc/sshbanner" >> /etc/ssh/sshd_config
service sshd restart

#limit ip to login
echo 'sshd:all:deny' >> /etc/hosts.deny
echo 'sshd:192.168.220.129:allow' >> /etc/hosts.allow
echo 'sshd:192.168.220.:allow' >> /etc/hosts.allow

#add password limit
#password remember
#add auth clock
cp -p /etc/pam.d/system-auth /etc/pam.d/system-auth.bak${MDFDATE}
echo "" >> /etc/pam.d/system-auth
echo "password    requisite     pam_cracklib.so dcredit=-1 lcredit=-1 ocredit=-1 minclass=2 minlen=8" >> /etc/pam.d/system-auth
echo "password    sufficient    pam_unix.so remember=5 md5 shadow nullok try_first_pass use_authtok" >> /etc/pam.d/system-auth
echo "auth required pam_tally2.so deny=6 onerr=fail no_magic_root unlock_time=120" >> /etc/pam.d/system-auth

#forbid ctrl+alt+del
cp -p /etc/inittab /etc/inittab.bak${MDFDATE}
sed -i '/ctrlaltdel/d' /etc/inittab
cp /etc/init/control-alt-delete.conf /etc/init/control-alt-delete.conf.bak${MDFDATE}
sed -i 's/^start/#start/g' /etc/init/control-alt-delete.conf
sed -i 's/^exec/#exec/g' /etc/init/control-alt-delete.conf

#umask
cp -p /etc/profile /etc/profile.bak${MDFDATE}
sed -i 's/umask 022/umask 027/g' /etc/profile
echo 'umask 027' >> /etc/profile
sed -i '/^TMOUT.*/d' /etc/profile
echo "export TMOUT=540" >>/etc/profile
cp -p /etc/csh.cshrc /etc/csh.cshrc.bak${MDFDATE}
echo 'set autologout = 540' >> /etc/csh.cshrc

#password file
chmod u+rw /etc/shadow
cp /etc/shadow /etc/shadow.bak${MDFDATE}
sed -i 's/^lp:/lp:!!/g' /etc/shadow
sed -i 's/^nobody:/nobody:!!/g' /etc/shadow
sed -i 's/^uucp:/uucp:!!/g' /etc/shadow
sed -i 's/^games:/games:!!/g' /etc/shadow
sed -i 's/^rpm:/rpm:!!/g' /etc/shadow
sed -i 's/^smmsp:/smmsp:!!/g' /etc/shadow
sed -i 's/^nfsnobody:/nfsnobody:!!/g' /etc/shadow
chmod  /etc/passwd
chmod  /etc/shadow
chmod  /etc/group

cp /etc/login.defs /etc/login.defs.bak${MDFDATE}
sed -i 's/PASS_MIN_LEN.*5*/PASS_MIN_LEN    8/g'  /etc/login.defs
sed -i 's/PASS_MAX_DAYS.*99999/PASS_MAX_DAYS   90/g' /etc/login.defs

#application user
#useradd -U forchk