├── .gitattributes ├── LICENSE ├── README.md ├── ban.sh ├── ddos.sh └── run.sh /.gitattributes: -------------------------------------------------------------------------------- 1 | # Auto detect text files and perform LF normalization 2 | * text=auto 3 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | {one line to give the program's name and a brief idea of what it does.} 635 | Copyright (C) 2018 {name of author} 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | CC attack protector Copyright (C) 2018 神代綺凜 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # CC attack protector 2 | 每10秒钟检测一次指定网站日志，如果超过预设限制的（在单位时间请求数以及请求大小层面）会在防火墙层面进行阻止，并运用Server酱进行通知 3 | 4 | **项目已放弃，发现使用这个方法，CC量过大超出nginx处理能力的时候，nginx无法正常记录日志** 5 | 6 | ## 说明 7 | 1. 请记得开启站点的日志记录，而且面板用户要注意检查并取消掉“静态文件的`access_log off`”，也就是所有访问都要记录日志，以确保最佳的防CC效果 8 | 1. 接上一条的情况，如果你的站点中有较大的多媒体文件，例如`mp3`或者`mp4`，那么最好在nginx中判断并`access_log off`，否则极有可能会因为多线程加载而导致误 Ban，这貌似也是本脚本的一个缺陷所在，在后续版本中会想对应办法解决 9 | 1. 日志的开头的格式必须为例如`x.x.x.x - - [22/Nov/2017:13:20:02 -0500] "GET /xxxxxx HTTP/1.1" 200 3386`，也就是IP在首列，时间格式与此示例相同，请求URL在第七列，请求长度在第十列，一般 nginx 日志的默认格式应该是这样，如果是其他的服务器软件或者日志格式不同请根据自己的情况魔改`ddos.sh`里的相关截取日志信息的代码 10 | 1. 建议定期分割日志，例如使用 crontab 一天分割一次，以确保脚本检测效率 11 | 1. 一旦有新 IP 被封禁，会输出封禁信息（当你回到 screen 后就可以看到），同时会输出日志到`cc.log`中 12 | 1. 如果想解封 IP，可以执行`bash ban.sh -ua`，这样会解封所有 IP 13 | 1. 关于`ban.sh`这个脚本还能做到的其他事情，请直接`bash ban.sh`查看 14 | 1. 如果 Centos，那么可能需要在`ban.sh`中操作防火墙之后重启一下防火墙，因为 Centos 防火墙修改规则之后不是即时生效的 15 | 16 | ## 使用 17 | ```bash 18 | git clone https://github.com/YKilin/CC-attack-protector.git 19 | cd CC-attack-protector 20 | ``` 21 | 22 | 然后修改`ddos.sh`前面的配置内容，根据注释说明修改即可 23 | 其实一般情况下关于CC攻击判断的设置并不用动，如果发现封禁效果与理想有差异再修改 24 | 其中`SCKEY`是Server酱微信推送的 KEY，请到 https://sc.ftqq.com 申请 25 | 26 | 建议使用 screen 来运行 27 | ```bash 28 | #没有 screen 就安装 29 | apt-get install screen 30 | screen 31 | #运行 32 | bash run.sh 33 | ``` 34 | 35 | 然后按下 Ctrl+A，再按下 D，即可退出 screen 界面 36 | 37 | 想回去的话就 38 | ```bash 39 | screen -r 40 | ``` 41 | 42 | ## 测试是否正常监控 43 | 当你配置好脚本后，可以使用`bash run.sh --test`命令来测试脚本是否有正常监控 44 | 45 | 当你使用`--test`参数运行`run.sh`脚本后，访问自己的网站，如果脚本有正常监控，那么每间隔10秒会输出一次监控到的访问记录，大概像这个样子 46 | ```bash 47 | Start protecting... 48 | [Test mode] 49 | #时间 访问量 重复访问次数 IP 50 | [18/Jan/2018:13:36:3x] 1 1 x.x.x.x 51 | [18/Jan/2018:13:36:4x] 15 1 x.x.x.x 52 | [18/Jan/2018:13:37:1x] 20 5 x.x.x.x 53 | ``` 54 | -------------------------------------------------------------------------------- /ban.sh: -------------------------------------------------------------------------------- 1 | #!/bin/bash 2 | 3 | showHelp(){ 4 | echo -e "-l\t\t输出封禁IP列表" 5 | echo -e "-b IP\t\t封禁指定IP" 6 | echo -e "-u Num\t\t解封指定序号的IP，你可以在封禁IP列表中得到序号" 7 | echo -e "-ua\t\t解封所有IP" 8 | } 9 | 10 | showList(){ 11 | echo "Baned IP list:" 12 | iptables -L INPUT -n --line-numbers | sed -e '1d' | grep 'DROP' 13 | } 14 | 15 | addBan(){ 16 | if [ $# -eq 1 ]; then 17 | iptables -I INPUT -s $1 -j DROP 18 | echo "Ban $1 successfully" 19 | elif [ $# -ge 2 ]; then 20 | iptables -I INPUT -s $1 -j DROP 21 | echo "Ban $1 because $2" 22 | fi 23 | } 24 | 25 | delBan(){ 26 | if [ $# -eq 1 ]; then 27 | iptables -D INPUT $1 28 | echo "Unban No.$1 successfully" 29 | fi 30 | } 31 | 32 | delAllBan(){ 33 | BAN_NUM_LIST=`iptables -L INPUT -n --line-numbers | sed -e '1d' | grep 'DROP' | awk '{print $1}'`; 34 | COUNT=0 35 | for BAN_NUM in $BAN_NUM_LIST 36 | do 37 | iptables -D INPUT $((BAN_NUM-COUNT)) 38 | let COUNT++ 39 | done 40 | echo "Unban all IP successfully" 41 | } 42 | 43 | case $1 in 44 | -l) 45 | showList 46 | ;; 47 | -b) 48 | addBan $2 $3 49 | ;; 50 | -u) 51 | delBan $2 52 | ;; 53 | -ua) 54 | delAllBan 55 | ;; 56 | *) 57 | showHelp 58 | ;; 59 | esac 60 | -------------------------------------------------------------------------------- /ddos.sh: -------------------------------------------------------------------------------- 1 | #!/bin/bash 2 | #配置 3 | LOG_FILES="/www/wwwlogs/*.log" #指定日志文件 4 | SCKEY="" #Server酱服务的SCKEY，用于通知CC攻击情况，https://sc.ftqq.com 5 | LIMIT_REPEAT=20 #重复的请求次数，超过直接封 6 | LIMIT_TIMES=50 #否则，在10秒内超过这么多连接日志数的会进入检测，并且满足下面这个条件的会被封禁 7 | LIMIT_FLOW=62914560 #请求大小之和 62914560 = 60MiB 8 | 9 | 10 | #开始 11 | #取得当前时间的10秒前（舍去秒个位） 12 | NOW_DATE=`date +"%d/%h/20%y:%T" -d "10 second ago" | head -c -2` 13 | 14 | #临时文件 15 | TMP_LOG=`mktemp` 16 | TMP_IP_LIST=`mktemp` 17 | TMP_LIST=`mktemp` 18 | 19 | #得到部分日志 20 | grep -h "$NOW_DATE" $LOG_FILES > $TMP_LOG 21 | #得到IP访问量排序 22 | grep -h "$NOW_DATE" $TMP_LOG | awk '{print $1}' | sort | uniq -c | sort -nr > $TMP_IP_LIST 23 | #得到IP访问数据总大小' 24 | IFS_old=$IFS 25 | IFS=$'\n' 26 | for LIST_LINE in `cat $TMP_IP_LIST` 27 | do 28 | CUR_TIMES=`echo $LIST_LINE | awk '{print $1}'` 29 | CUR_IP=`echo $LIST_LINE | awk '{print $2}'` 30 | #判断重复请求次数 31 | CUR_REPEAT=`grep -h $CUR_IP $TMP_LOG | awk '{print $7}' | sort | uniq -c | sort -nr | head -1 | awk '{print $1}'` 32 | if [ "${1}x" = "--testx" ]; then 33 | echo -e "\033[033m[${NOW_DATE}x]\033[0m\t$CUR_TIMES\t$CUR_REPEAT\t$CUR_IP" 34 | fi 35 | if [ $CUR_REPEAT -ge $LIMIT_REPEAT ]; then 36 | echo "$CUR_IP REPEAT:$CUR_REPEAT>=$LIMIT_REPEAT" >> $TMP_LIST 37 | #判断访问量 38 | elif [ $CUR_TIMES -ge $LIMIT_TIMES ]; then 39 | TOTAL_FLOW=0 40 | #某IP的单条流量记录 41 | for LINE_LOG_FLOW in `grep -h $CUR_IP $TMP_LOG | awk '{print $10}'` 42 | do 43 | TOTAL_FLOW=$((TOTAL_FLOW+LINE_LOG_FLOW)) 44 | done 45 | #如果流量大于设定的最大流量值则Ban 46 | if [ $TOTAL_FLOW -ge $LIMIT_FLOW ]; then 47 | echo "$CUR_IP FLOW:$TOTAL_FLOW>=$LIMIT_FLOW" >> $TMP_LIST 48 | fi 49 | fi 50 | done 51 | 52 | #Ban他妈的 53 | TIME_FLAG=1 54 | if [ -n "`cat $TMP_LIST`" ]; then 55 | PWDIR="$( cd "$( dirname "$0" )" && pwd )" 56 | IP_LIST=""; 57 | for TMP_LINE in `cat $TMP_LIST` 58 | do 59 | TMP_IP=`echo $TMP_LINE | awk '{print $1}'` 60 | TMP_REASON=`echo $TMP_LINE | awk '{print $2}'` 61 | TEST_R=`iptables -L INPUT -n --line-numbers | grep 'DROP' | grep "$TMP_IP"` 62 | if [ -z "$TEST_R" ]; then 63 | if [ $TIME_FLAG -eq 1 ]; then 64 | echo -e "\033[033m`date`\033[0m" 65 | date >> "$PWDIR"/cc.log 66 | TIME_FLAG=0 67 | fi 68 | bash "$PWDIR"/ban.sh -b $TMP_IP $TMP_REASON & 69 | echo "Ban $TMP_IP because $TMP_REASON" >> "$PWDIR"/cc.log 70 | IP_LIST=${IP_LIST}"$TMP_IP " 71 | fi 72 | done 73 | if [ -n "$SCKEY" ]; then 74 | curl -d "text=CC攻击警报&desp=$IP_LIST" "https://sc.ftqq.com/$SCKEY.send" >& /dev/null & 75 | fi 76 | fi 77 | IFS=$IFS_old 78 | 79 | #删除临时文件 80 | rm $TMP_IP_LIST 81 | rm $TMP_LOG 82 | rm $TMP_LIST -------------------------------------------------------------------------------- /run.sh: -------------------------------------------------------------------------------- 1 | #!/bin/bash 2 | clear 3 | echo "Start protecting..." 4 | if [ "${1}x" = "--testx" ]; then 5 | echo "[Test mode]" 6 | fi 7 | PWDIR="$( cd "$( dirname "$0" )" && pwd )" 8 | while true 9 | do 10 | bash "$PWDIR"/ddos.sh $1 & 11 | sleep 10 12 | done --------------------------------------------------------------------------------