DDoS deflate is actually very simple, and here are the detailed installation and configuration steps:
1. Install DDoS deflate
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chmod 0700 install.sh
./install.sh
After the copyright information pops up, type q under SSH to exit the copyright information.
2. Configure DDoS deflate .
After successful installation, you will be prompted that the Config file is at /usr/local/ddos/ddos.conf, so you can make a brief configuration in ddos.conf.
# vim /usr/local/ddos/ddos.conf
##### Paths of the script and other files
PROGDIR=”/usr/local/ddos”
PROG=”/usr/local/ddos/ddos.sh”
IGNORE_IP_LIST="/usr/local/ddos/ignore.ip.list" //whitelist
CRON=”/etc/cron.d/ddos.cron”
APF=”/etc/apf/apf”
IPT=”/sbin/iptables”
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##### frequency in minutes for running the script
##### Caution: Every time this setting is changed, run the script with –cron
##### option so that the new frequency takes effect
FREQ=1
ddos.sh the frequency of execution, in minutes, with crontab to execute.
If you change this setting, do /usr/local/ddos/ddos.sh –cron
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##### How many connections define a bad IP? Indicate that below.
NO_OF_CONNECTIONS=150
//当哪个IP的连接数达到150就加入黑名单；查看连接数你可以执行
#netstat -ntu | awk ‘{print $5}’ | cut -d: -f1 | sort | uniq -c | sort -n
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##### APF_BAN=1 (Make sure your APF version is atleast 0.96)
##### APF_BAN=0 (Uses iptables for banning ips instead of APF)
APF_BAN=0
Normally, you use iptables for firewalls, so here you need to change the value of APF_BAN to 0.
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##### KILL=0 (Bad IPs are’nt banned, good for interactive execution of script)
##### KILL=1 (Recommended setting)
KILL=1
Add illegal IP to the INPUT chain of iptables and DROP.
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##### An email is sent to the following address when an IP is banned.
##### Blank would suppress sending of mails
EMAIL_TO=”root”
//给root发一封邮件
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##### Number of seconds the banned ip should remain in blacklist.
BAN_PERIOD=600
//关押黑名单中的IP的时长
3. Uninstall DDoS deflate if you don't want to use .
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chmod 0700 uninstall.ddos
./uninstall.ddos
Also, if you always receive email prompts like the following:
Banned the following ip addresses on Tue Aug 5 01:32:01 BST 2008
1120 with 1120 connections
Look at line 117 of the /usr/local/ddos/ddos.sh file
netstat -ntu | awk ‘{print $5}’ | cut -d: -f1 | sort | uniq -c | sort -nr > $BAD_IP_LIST
Just modify it to the following code!
netstat -ntu | awk ‘{print $5}’ | cut -d: -f1 | sed -n ‘/[0-9]/p’ | sort | uniq -c | sort -nr > $BAD_IP_LIST
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Posted on 12/22/2014 11:09:48 PM
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Posted on 12/26/2014 3:03:05 AM
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