目录

​编辑

一、在CentOS上安装Python3

1.下载Python3.10源代码文件

2.运行以下命令行完成安装

3.确认是否安装成功

 二、理解各个命令的含义

1.uptime

2.netstat

3.ss

4.firewall-cmd

5.sysctl

三、利用Python实现DDOS入侵检测

1.采集TCP连接数据

---

一、在CentOS上安装Python3

1.下载Python3.10源代码文件

下载地址:https://www.python.org/downloads/source/

2.运行以下命令行完成安装

mkdir /usr/local/python3
tar -zxvf Python-3.10.0.tgz
cd Python-3.10.0
./configure --prefix=/usr/local/python3
make
make install

3.确认是否安装成功

/usr/local/python3/bin/python3
import time
print(time.strftime("%Y-%m-%d %H:%M:%S"))
import random
print(random.randint(100,200))
exit()

 4.设置环境变量

vi ~/.bashrc
 
#添加该语句 
alias python3=/usr/local/python3/bin/python3
alias pip3=/usr/local/python3/bin/pip3

alias python3=/usr/local/python3/bin/python3
alias pip3=/usr/local/pyuthon3/bin/pip3
source ~/.bashrc

5.配置pip国内镜像源

[global]
index-url=https://pypi.douban.com/simple
trusted-host = pypi.douban.com

 二、理解各个命令的含义

1.uptime

2.netstat

3.ss

4.firewall-cmd

打开防火墙80端口：firewall-cmd --add-port=80/tcp

5.sysctl

三、利用Python实现DDOS入侵检测

1.采集TCP连接数据

# 4、采集连接数量最多的IP地址
def get_most_ip():
    result = os.popen('netstat -ant | grep :80').read()
    line_list = result.split('\n')
    ip_list = []
    for line in line_list:
        try:
            temp_list = line.split()
            ip = temp_list[4].split(':')[0]
            ip_list.append(ip)
        except:
            pass

    dict = Counter(ip_list)
    most_ip = dict.most_common(1)
    return most_ip[0][0]

# 5、调用firewall-cmd防火墙命令封锁攻击源IP地址
def firewall_ip(ip):
    result = os.popen(f"firewall-cmd --add-rich-rule='rule family=ipv4 source address={ip} port port=80 protocol=tcp reject'").read()
    if 'success' in result:
        print(f"已经成功将可疑攻击源 {ip} 进行封锁，流量将不再进入.")
    else:
        print(f"对可疑攻击源 {ip} 进行封锁时失败，转为人工处理.")


#解除封锁：firewall-cmd --add-rich-rule='rule family=ipv4 source address=192.168.80.21 port port=80 protocol=tcp reject'