查看端口有没有关闭

netstat -an | findstr :端口号

netstat -an | findstr :8080

TCP    0.0.0.0:8080           0.0.0.0:0              LISTENING

netstat -tuln | grep :端口号

netstat -tuln | grep :80

ss -tuln | grep :端口号

ss -tuln | grep :80

sudo apt-get install nmap

sudo yum install nmap

nmap -p 端口号 主机IP

nmap -p 80 192.168.1.1

import socket

def check_port(ip, port):
    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    sock.settimeout(1)
    result = sock.connect_ex((ip, port))
    sock.close()
    return result == 0

ip = '127.0.0.1'
port = 80
if check_port(ip, port):
    print(f"Port {port} is open")
else:
    print(f"Port {port} is closed")

netstat -ano | findstr :端口号
taskkill /PID 进程ID /F

lsof -i :端口号
kill -9 进程ID

# 使用iptables
sudo iptables -A INPUT -p tcp --dport 端口号 -j ACCEPT

# 使用firewalld
sudo firewall-cmd --zone=public --add-port=端口号/tcp --permanent
sudo firewall-cmd --reload