1、环境检查
#!/bin/bash
##Filename: CentOS_Check_Script.sh
##Date: 2019-03-01
##Description: Security detection script
echo "##########################################################################"
echo "# #"
echo "# Epoint health check script #"
echo "# #"
echo "#警告:本脚本只是一个检查的操作,未对服务器做任何修改,管理员可以根据此报告 #"
echo "#进行相应的安全整改 #"
echo "##########################################################################"
echo " "
#read -p "=====================Are You Ready,Please press enter=================="
echo " "
echo "##########################################################################"
echo "# #"
echo "# 主机安全检测 #"
echo "# #"
echo "##########################################################################"
echo " "
echo ">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>系统基本信息<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<"
hostname=$(uname -n)
system=$(cat /etc/os-release | grep "^NAME" | awk -F\" '{print $2}')
version=$(cat /etc/redhat-release | awk '{print $4$5}')
kernel=$(uname -r)
platform=$(uname -p)
address=$(ip addr | grep inet | grep -v "inet6" | grep -v "127.0.0.1" | awk '{ print $2; }' | tr '\n' '\t' )
cpumodel=$(cat /proc/cpuinfo | grep name | cut -f2 -d: | uniq)
cpu=$(cat /proc/cpuinfo | grep 'processor' | sort | uniq | wc -l)
machinemodel=$(dmidecode | grep "Product Name" | sed 's/^[ \t]*//g' | tr '\n' '\t' )
date=$(date)
echo "主机名: $hostname"
echo "系统名称: $system"
echo "系统版本: $version"
echo "内核版本: $kernel"
echo "系统类型: $platform"
echo "本机IP地址: $address"
echo "CPU型号: $cpumodel"
echo "CPU核数: $cpu"
echo "机器型号: $machinemodel"
echo "系统时间: $date"
echo " "
echo ">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>资源使用情况<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<"
summemory=$(free -h |grep "Mem:" | awk '{print $2}')
freememory=$(free -h |grep "Mem:" | awk '{print $4}')
usagememory=$(free -h |grep "Mem:" | awk '{print $3}')
uptime=$(uptime | awk '{print $2" "$3" "$4" "$5}' | sed 's/,$//g')
loadavg=$(uptime | awk '{print $9" "$10" "$11" "$12" "$13}')
echo "总内存大小: $summemory"
echo "已使用内存大小: $usagememory"
echo "可使用内存大小: $freememory"
echo "系统运行时间: $uptime"
echo "系统负载: $loadavg"
echo "=============================dividing line================================"
echo "内存状态:"
vmstat 2 5
echo "=============================dividing line================================"
echo "僵尸进程:"
ps -ef | grep zombie | grep -v grep
if [ $? == 1 ];then
echo ">>>无僵尸进程"
else
echo ">>>有僵尸进程------[需调整]"
fi
echo "=============================dividing line================================"
echo "耗CPU最多的进程:"
ps auxf |sort -nr -k 3 |head -5
echo "=============================dividing line================================"
echo "耗内存最多的进程:"
ps auxf |sort -nr -k 4 |head -5
echo "=============================dividing line================================"
echo "环境变量:"
env
echo "=============================dividing line================================"
echo "路由表:"
route -n
echo "=============================dividing line================================"
echo "监听端口:"
netstat -tunlp
echo "=============================dividing line================================"
echo "当前建立的连接:"
netstat -n | awk '/^tcp/ {++S[$NF]} END {for(a in S) print a, S[a]}'
echo "=============================dividing line================================"
echo "开机启动的服务:"
systemctl list-unit-files | grep enabled
echo " "
echo ">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>系统用户情况<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<"
echo "活动用户:"
w | tail -n +2
echo "=============================dividing line================================"
echo "系统所有用户:"
cut -d: -f1,2,3,4 /etc/passwd
echo "=============================dividing line================================"
echo "系统所有组:"
cut -d: -f1,2,3 /etc/group
echo "=============================dividing line================================"
echo "当前用户的计划任务:"
crontab -l
echo " "
echo ">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>身份鉴别安全<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<"
grep -i "^password.*requisite.*pam_cracklib.so" /etc/pam.d/system-auth > /dev/null
if [ $? == 0 ];then
echo ">>>密码复杂度:已设置"
else
grep -i "pam_pwquality\.so" /etc/pam.d/system-auth > /dev/null
if [ $? == 0 ];then
echo ">>>密码复杂度:已设置"
else
echo ">>>密码复杂度:未设置,请加固密码--------[需调整]"
fi
fi
echo "=============================dividing line================================"
awk -F":" '{if($2!~/^!|^*/){print ">>>("$1")" " 是一个未被锁定的账户,请管理员检查是否是可疑账户--------[需调整]"}}' /etc/shadow
echo "=============================dividing line================================"
more /etc/login.defs | grep -E "PASS_MAX_DAYS" | grep -v "#" |awk -F' ' '{if($2!=90){print ">>>密码过期天数是"$2"天,请管理员改成90天------[需调整]"}}'
echo "=============================dividing line================================"
grep -i "^auth.*required.*pam_tally2.so.*$" /etc/pam.d/sshd > /dev/null
if [ $? == 0 ];then
echo ">>>登入失败处理:已开启"
else
echo ">>>登入失败处理:未开启,请加固登入失败锁定功能----------[需调整]"
fi
echo " "
echo ">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>访问控制安全<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<"
echo "系统中存在以下非系统默认用户:"
more /etc/passwd |awk -F ":" '{if($3>500){print ">>>/etc/passwd里面的"$1 "的UID为"$3"，该账户非系统默认账户，请管理员确认是否为可疑账户--------[需调整]"}}'
echo "=============================dividing line================================"
echo "系统特权用户:"
awk -F: '$3==0 {print $1}' /etc/passwd
echo "=============================dividing line================================"
echo "系统中空口令账户:"
awk -F: '($2=="!!") {print $1"该账户为空口令账户，请管理员确认是否为新增账户，如果为新建账户，请配置密码-------[需调整]"}' /etc/shadow
echo " "
echo ">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>安全审计<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<"
echo "正常情况下登录到本机30天内的所有用户的历史记录:"
last | head -n 30
echo "=============================dividing line================================"
echo "查看syslog日志审计服务是否开启:"
if service rsyslog status | egrep " active \(running";then
echo ">>>经分析,syslog服务已开启"
else
echo ">>>经分析,syslog服务未开启，建议通过service rsyslog start开启日志审计功能---------[需调整]"
fi
echo "=============================dividing line================================"
echo "查看syslog日志是否开启外发:"
if more /etc/rsyslog.conf | egrep "@...\.|@..\.|@.\.|\*.\* @...\.|\*\.\* @..\.|\*\.\* @.\.";then
echo ">>>经分析,客户端syslog日志已开启外发--------[需调整]"
else
echo ">>>经分析,客户端syslog日志未开启外发---------[无需调整]"
fi
echo "=============================dividing line================================"
echo "审计的要素和审计日志:"
more /etc/rsyslog.conf | grep -v "^[$|#]" | grep -v "^$"
echo "=============================dividing line================================"
echo "系统中关键文件修改时间:"
ls -ltr /bin/ls /bin/login /etc/passwd /bin/ps /etc/shadow|awk '{print ">>>文件名："$9" ""最后修改时间："$6" "$7" "$8}'
echo "
###############################################################################################
# ls文件:是存储ls命令的功能函数,被删除以后,就无法执行ls命令 #
# login文件:login是控制用户登录的文件,一旦被篡改或删除,系统将无法切换用户或登陆用户 #
# /etc/passwd是一个文件,主要是保存用户信息 #
# /bin/ps 进程查看命令功能支持文件,文件损坏或被更改后,无法正常使用ps命令 #
# /etc/shadow是/etc/passwd的影子文件,密码存放在该文件当中,并且只有root用户可读 #
###############################################################################################"
echo "=============================dividing line================================"
echo "检查重要日志文件是否存在:"
log_secure=/var/log/secure
log_messages=/var/log/messages
log_cron=/var/log/cron
log_boot=/var/log/boot.log
log_dmesg=/var/log/dmesg
if [ -e "$log_secure" ]; then
echo ">>>/var/log/secure日志文件存在"
else
echo ">>>/var/log/secure日志文件不存在------[需调整]"
fi
if [ -e "$log_messages" ]; then
echo ">>>/var/log/messages日志文件存在"
else
echo ">>>/var/log/messages日志文件不存在------[需调整]"
fi
if [ -e "$log_cron" ]; then
echo ">>>/var/log/cron日志文件存在"
else
echo ">>>/var/log/cron日志文件不存在--------[需调整]"
fi
if [ -e "$log_boot" ]; then
echo ">>>/var/log/boot.log日志文件存在"
else
echo ">>>/var/log/boot.log日志文件不存在--------[需调整]"
fi
if [ -e "$log_dmesg" ]; then
echo ">>>/var/log/dmesg日志文件存在"
else
echo ">>>/var/log/dmesg日志文件不存在--------[需调整]"
fi
echo " "
echo ">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>剩余信息保护<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<"
echo "分区情况:"
echo "如果磁盘空间利用率过高，请及时调整---------[需调整]"
df -h
echo "=============================dividing line================================"
echo "可用块设备信息:"
lsblk
echo "=============================dividing line================================"
echo "文件系统信息:"
more /etc/fstab | grep -v "^#" | grep -v "^$"
echo " "
echo ">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>入侵防范安全<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<"
echo "系统入侵行为:"
more /var/log/secure |grep refused
if [ $? == 0 ];then
echo "有入侵行为，请分析处理--------[需调整]"
else
echo ">>>无入侵行为"
fi
echo "=============================dividing line================================"
echo "用户错误登入列表:"
lastb | head > /dev/null
if [ $? == 1 ];then
echo ">>>无用户错误登入列表"
else
echo ">>>用户错误登入--------[需调整]"
lastb | head
fi
echo "=============================dividing line================================"
echo "ssh暴力登入信息:"
more /var/log/secure | grep "Failed" > /dev/null
if [ $? == 1 ];then
echo ">>>无ssh暴力登入信息"
else
more /var/log/secure|awk '/Failed/{print $(NF-3)}'|sort|uniq -c|awk '{print ">>>登入失败的IP和尝试次数: "$2"="$1"次---------[需调整]";}'
fi
echo " "
echo ">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>恶意代码防范<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<"
echo "检查是否安装病毒软件:"
crontab -l | grep clamscan.sh > /dev/null
if [ $? == 0 ];then
echo ">>>已安装ClamAV杀毒软件"
crontab -l | grep freshclam.sh > /dev/null
if [ $? == 0 ];then
echo ">>>已部署定时更新病毒库"
fi
else
echo ">>>未安装ClamAV杀毒软件,请部署杀毒软件加固主机防护--------[无需调整]"
fi
echo " "
echo ">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>资源控制安全<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<"
echo "查看是否开启了xinetd服务:"
if ps -elf |grep xinet |grep -v "grep xinet";then
echo ">>>xinetd服务正在运行，请检查是否可以把xinetd服务关闭--------[无需调整]"
else
echo ">>>xinetd服务未开启-------[无需调整]"
fi
echo "=============================dividing line================================"
echo "查看是否开启了ssh服务:"
if service sshd status | grep -E "listening on|active \(running\)"; then
echo ">>>SSH服务已开启"
else
echo ">>>SSH服务未开启--------[需调整]"
fi
echo "=============================dividing line================================"
echo "查看是否开启了Telnet-Server服务:"
if more /etc/xinetd.d/telnetd 2>&1|grep -E "disable=no"; then
echo ">>>Telnet-Server服务已开启"
else
echo ">>>Telnet-Server服务未开启--------[无需调整]"
fi
echo "=============================dividing line================================"
ps axu | grep iptables | grep -v grep || ps axu | grep firewalld | grep -v grep
if [ $? == 0 ];then
echo ">>>防火墙已启用"
iptables -nvL --line-numbers
else
echo ">>>防火墙未启用--------[需调整]"
fi
echo "=============================dividing line================================"
echo "查看系统SSH远程访问设置策略(host.deny拒绝列表):"
if more /etc/hosts.deny | grep -E "sshd"; then
echo ">>>远程访问策略已设置--------[需调整]"
else
echo ">>>远程访问策略未设置--------[无需调整]"
fi
echo "=============================dividing line================================"
echo "查看系统SSH远程访问设置策略(hosts.allow允许列表):"
if more /etc/hosts.allow | grep -E "sshd"; then
echo ">>>远程访问策略已设置--------[需调整]"
else
echo ">>>远程访问策略未设置--------[无需调整]"
fi
echo "=============================dividing line================================"
echo "当hosts.allow和host.deny相冲突时,以hosts.allow设置为准"
echo "=============================dividing line================================"
grep -i "TMOUT" /etc/profile /etc/bashrc
if [ $? == 0 ];then
echo ">>>已设置登入超时限制"
else
echo ">>>未设置登入超时限制,请设置,设置方法:在/etc/profile或者/etc/bashrc里面添加参数TMOUT=600 --------[需调整]"
fi
echo ">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>end<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<"
2、加固
#!/bin/bash
##Filename: OS-centOS-Protective_v0.1.sh
##Author: Browser
##Date: 2019-02-24
##Description: Operating system security reinforcement
#########################variables############################
restart_flag=1
ostype='unknow'
###########################ostype############################
if [ -f /etc/redhat-release ];then
grep -i 'centos' /etc/redhat-release > /dev/null
if [ $? == 0 ];then
ostype='centos'
fi
grep -i 'redhat' /etc/redhat-release > /dev/null
if [ $? == 0 ];then
ostype='redhat'
fi
fi
if [ -f /etc/centos-release ];then
grep -i 'centos' /etc/centos-release > /dev/null
if [ $? == 0 ];then
ostype='centos'
fi
fi
echo -e "###########################################################################################"
echo -e "\033[1;31m OS type is $ostype \033[0m"
echo -e "###########################################################################################"
#######################restart_ssh################################
function restart_ssh(){
if [ $restart_flag == 0 ];then
echo -e "\033[1;31mPlease restart SSH service manully by using 'service sshd restart' or 'systemctl restart sshd'\033[0m"
fi
}
###########################文件备份############################
function backup(){
if [ ! -x "backup" ]; then
mkdir backup
if [ -f /etc/pam.d/system-auth ];then
cp /etc/pam.d/system-auth backup/system-auth.bak
elif [ -f /etc/pam.d/common-password ];then
cp /etc/pam.d/common-password backup/common-password.bak
fi
if [ -f ~/.ssh/authorized_keys ];then
cp ~/.ssh/authorized_keys backup/authorized_keys.bak
fi
cp /etc/pam.d/sshd backup/sshd.bak
cp /etc/sudoers backup/sudoers.bak
cp /etc/ssh/sshd_config backup/sshd_config.bak
cp /etc/profile backup/profile.bak
cp /etc/pam.d/su backup/su.bak
echo -e "###########################################################################################"
echo -e "\033[1;31m Auto backup successfully \033[0m"
echo -e "###########################################################################################"
else
echo -e "###########################################################################################"
echo -e "\033[1;31mBackup file already exist, to avoid overwriting these files, backup will not perform again\033[0m "
echo -e "###########################################################################################"
fi
}
###########################执行备份############################
backup
###########################文件还原############################
function recover(){
if [ -f backup/system-auth.bak ];then
cp -rf backup/system-auth.bak /etc/pam.d/system-auth
elif [ -f backup/common-password.bak ];then
cp -rf backup/common-password.bak /etc/pam.d/common-password
fi
if [ -f backup/authorized_keys.bak ];then
cp -rf backup/authorized_keys.bak ~/.ssh/authorized_keys
fi
cp -rf backup/sshd.bak /etc/pam.d/sshd
cp -rf backup/sudoers.bak /etc/sudoers
cp -rf backup/sshd_config.bak /etc/ssh/sshd_config
cp -rf backup/profile.bak /etc/profile
source /etc/profile
cp -rf backup/su.bak /etc/pam.d/su
restart_flag=0
echo -e "\033[1;31m 8、 Recover success \033[0m"
}
###########################口令复杂度设置############################
function password(){
echo "#########################################################################################"
echo -e "\033[1;31m 2、 set password complexity requirements \033[0m"
echo "#########################################################################################"
if [ -f /etc/pam.d/system-auth ];then
config="/etc/pam.d/system-auth"
elif [ -f /etc/pam.d/common-password ];then
config="/etc/pam.d/common-password"
else
echo -e "\033[1;31m Doesn't support this OS \033[0m"
return 1
fi
grep -i "^password.*requisite.*pam_cracklib.so" $config > /dev/null
if [ $? == 0 ];then
sed -i "s/^password.*requisite.*pam_cracklib\.so.*$/password requisite pam_cracklib.so retry=3 difok=3 minlen=12 ucredit=-1 lcredit=-1 dcredit=-1 ocredit=-1/g" $config
echo -e "\033[1;31m密码修改重试3次机会，新密码与老密码必须有3字符不同，最小密码长度12个字符，包含大写字符至少一个，小写字母至少一个，数字至少一个，特殊字符至少一个\033[0m"
else
grep -i "pam_pwquality\.so" $config > /dev/null
if [ $? == 0 ];then
sed -i "s/password.*requisite.*pam_pwquality\.so.*$/password requisite pam_pwquality.so retry=3 difok=3 minlen=12 ucredit=-1 lcredit=-1 dcredit=-1 ocredit=-1/g" $config
echo -e "\033[1;31m密码修改重试3次机会，新密码与老密码必须有3字符不同，最小密码长度12个字符，包含大写字符至少一个，小写字母至少一个，数字至少一个，特殊字符至少一个\033[0m"
else
echo 'password requisite pam_cracklib.so retry=3 difok=3 minlen=12 ucredit=-1 lcredit=-1 dcredit=-1 ocredit=-1' >> $config
echo -e "\033[1;31m密码修改重试3次机会，新密码与老密码必须有3字符不同，最小密码长度12个字符，包含大写字符至少一个，小写字母至少一个，数字至少一个，特殊字符至少一个\033[0m"
fi
fi
if [ $? == 0 ];then
echo -e "\033[37;5m [Password complexity set success] \033[0m"
else
echo -e "\033[31;5m [Password complexity set failed] \033[0m"
exit 1
fi
}
################################新增超级管理员用户################################
function create_user(){
echo "#########################################################################################"
echo -e "\033[1;31m 3、Create eproot account \033[0m"
echo "#########################################################################################"
read -p "Be sure to create an eproot account?[y/n]:"
case $REPLY in
y)
grep -i 'eproot' /etc/passwd
if [ $? == 0 ];then
echo -e "\033[1;31m An eproot account has been created \033[0m"
else
read -p "Please enter your password:" PASSWD
useradd -g root eproot;echo "$PASSWD" | passwd --stdin eproot > /dev/null
if [ $? == 0 ];then
echo -e "\033[1;31m eproot account created successfully \033[0m"
grep -i "eproot" /etc/sudoers
if [ $? != 0 ];then
chmod u+w /etc/sudoers > /dev/null
sed -i '/^root.*ALL=(ALL).*$/a\eproot ALL=(ALL) NOPASSWD:ALL' /etc/sudoers > /dev/null
if [ $? == 0 ];then
echo -e "\033[37;5m [Permissions set success] \033[0m"
else
echo -e "\033[31;5m [Permissions set failed] \033[0m"
fi
chmod u-w /etc/sudoers > /dev/null
else
echo -e "\033[1;31m Permissions have already been set \033[0m"
fi
else
echo -e "\033[1;31m eproot account created failed \033[0m"
exit 1
fi
fi
;;
n)
;;
*)
create_user
esac
}
############################限制超级管理员用户远程登录############################
function remote_login(){
echo "#########################################################################################"
echo -e "\033[1;31m 4、Set Remote Login Configuration(SSH) \033[0m"
echo "#########################################################################################"
#set Protocol 2
echo >> /etc/ssh/sshd_config
grep -i '^Protocol' /etc/ssh/sshd_config > /dev/null
if [ $? == 0 ];then
sed -i 's/^Protocol.*$/Protocol 2/g' /etc/ssh/sshd_config
if [ $? != 0 ];then
echo -e "\033[31;5m [##Error##]: Cannot to set Protocol to '2' \033[0m"
else
echo -e "\033[37;5m [Success: Set SSH Protocol to 2] \033[0m"
fi
else
echo 'Protocol 2' >> /etc/ssh/sshd_config
echo -e "\033[37;5m [Success: Set SSH Protocol to 2] \033[0m"
fi
read -p "Disable root remote login?[y/n](Please make sure you have created at least one another account):"
case $REPLY in
y)
grep -i '^PermitRootLogin no' /etc/ssh/sshd_config > /dev/null
if [ $? == 1 ];then
grep -i '.*PermitRootLogin yes' /etc/ssh/sshd_config >/dev/null
if [ $? == 0 ];then
sed -i 's/.*PermitRootLogin yes/PermitRootLogin no/g' /etc/ssh/sshd_config
if [ $? != 0 ];then
echo -e "\033[31;5m [##Error##]cannot to set PermitRootLogin to 'no' \033[0m"
else
echo -e "\033[37;5m Disable root remote login[Success] \033[0m"
restart_flag=0
fi
else
echo 'PermitRootLogin no' >> /etc/ssh/sshd_config
echo -e "\033[37;5m Disable root remote login[Success] \033[0m"
restart_flag=0
fi
else
echo -e "\033[37;5m Already disable root remote login \033[0m"
fi
;;
n)
;;
*)
remote_login
;;
esac
}
#######################配置系统历史命令操作记录和定时帐户自动登出时间################################
function set_history_tmout(){
echo "#########################################################################################"
echo -e "\033[1;31m 5、set history and timeout \033[0m"
echo "#########################################################################################"
read -p "set history size, format, and TMOUT?[y/n]:"
case $REPLY in
y)
#history_size
grep -i "^HISTSIZE=" /etc/profile >/dev/null
if [ $? == 0 ];then
#history记录保留一万条
sed -i "s/^HISTSIZE=.*$/HISTSIZE=10000/g" /etc/profile
else
echo 'HISTSIZE=10000' >> /etc/profile
fi
echo -e "\033[1;31m HISTSIZE has been set to 10000 \033[0m"
#history_format
grep -i "^export HISTTIMEFORMAT=" /etc/profile > /dev/null
if [ $? == 0 ];then
sed -i 's/^export HISTTIMEFORMAT=.*$/export HISTTIMEFORMAT="%F %T `whoami`"/g' /etc/profile
else
echo 'export HISTTIMEFORMAT="%F %T `whoami` "' >> /etc/profile
fi
echo -e '\033[1;31m HISTTIMEFORMAT has been set to "Number-Time-User-Command" \033[0m'
#TIME_OUT
read -p "set shell TMOUT?[300-600]seconds:" tmout
: ${tmout:=600}
grep -i "^TMOUT=" /etc/profile > /dev/null
if [ $? == 0 ];then
sed -i "s/^TMOUT=.*$/TMOUT=$tmout/g" /etc/profile
else
echo "TMOUT=$tmout" >> /etc/profile
fi
source /etc/profile
echo -e "\033[37;5m [Success] \033[0m"
;;
n)
;;
*)
set_history_tmout;;
esac
}
#######################SSH端口配置################################
function ssh_port(){
echo "#########################################################################################"
echo -e "\033[1;31m 6、set ssh port \033[0m"
echo "#########################################################################################"
read -p 'change ssh port?[y/n]:'
case $REPLY in
y)
read -p 'please input the new ssh port(recommend to between 1024 and 65534, please make sure the port is not in used):' port
##验证端口是否被占用
if [[ $port -gt 1024 && $port -lt 65535 ]];then
netstat -tlnp|awk -v port=$port '{lens=split($4,a,":");if(a[lens]==port){exit 2}}' >/dev/null #2>&1
res=$?
if [ $res == 2 ];then
echo -e "\033[1;31m The port $port is already in used, try again \033[0m"
ssh_port
elif [ $res == 1 ];then
echo -e "\033[31;5m [##Error##] \033[0m"
exit 1
else
##修改ssh端口
grep -i "^#Port " /etc/ssh/sshd_config > /dev/null
if [ $? == 0 ];then
sed -i "s/^#Port.*$/Port $port/g" /etc/ssh/sshd_config
else
grep -i "^Port " /etc/ssh/sshd_config > /dev/null
if [ $? == 0 ];then
sed -i "s/^Port.*$/Port $port/g" /etc/ssh/sshd_config
else
echo "Port $port" >> /etc/ssh/sshd_config
fi
fi
echo -e "\033[37;5m [Success] \033[0m"
restart_flag=0
fi
else
echo -e "\033[31;5m [##The port $port is error, please input new ssh port between 1024 and 65534 ##] \033[0m"
ssh_port
fi
;;
n)
;;
*)
echo -e "\033[31;5m [##Error##]:invalid input \033[0m"
ssh_port
;;
esac
}
#######################Logon failure handling################################
function logon(){
echo "#########################################################################################"
echo -e "\033[1;31m 7、set logon failure handling \033[0m"
echo "#########################################################################################"
logonconfig=/etc/pam.d/sshd
read -p 'Are you sure set logon failure handling?[y/n]:'
case $REPLY in
y)
grep -i "^auth.*required.*pam_tally2.so.*$" $logonconfig > /dev/null
if [ $? == 0 ];then
sed -i "s/auth.*required.*pam_tally2.so.*$/auth required pam_tally2.so deny=3 unlock_time=300 even_deny_root root_unlock_time=300/g" $logonconfig > /dev/null
else
sed -i '/^#%PAM-1.0/a\auth required pam_tally2.so deny=3 unlock_time=300 even_deny_root root_unlock_time=300' $logonconfig > /dev/null
fi
if [ $? == 0 ];then
echo "#########################################################################################"
echo -e "\033[37;5m [Logon failure handling set success] \033[0m"
echo -e "\033[1;31m限制登入失败三次，普通账号锁定5分钟，root账号锁定5分钟\033[0m"
echo "#########################################################################################"
else
echo "#########################################################################################"
echo -e "\033[31;5m [Logon failure handling set failed] \033[0m"
echo "#########################################################################################"
exit 1
fi
;;
n)
;;
*)
echo -e "\033[31;5m [##Error##]:invalid input \033[0m"
logon
;;
esac
}
#######################main################################
function main(){
echo -e "\033[1;31m
#########################################################################################
# Menu #
# 1:ALL protective #
# 2:Set Password Complexity Requirements #
# 3:Create eproot account #
# 4:Set Remote Login Configuration(SSH) #
# 5:Set Shell History and TMOUT #
# 6:Set SSH Port #
# 7:Set Logon failure handling #
# 8:Recover Configuration #
# 9:Exit #
######################################################################################### \033[0m"
read -p "Please choice[1-9]:"
case $REPLY in
1)
password
create_user
remote_login
set_history_tmout
ssh_port
logon
restart_ssh
;;
2)
password
;;
3)
create_user
;;
4)
remote_login
restart_ssh
;;
5)
set_history_tmout
;;
6)
ssh_port
restart_ssh
;;
7)
logon
restart_ssh
;;
8)
recover
restart_ssh
;;
9)
exit 0
;;
*)
echo -e "\033[31;5m invalid input \033[0m"
main
;;
esac
}
######################
main
来源