怎么检测域名被墙

import socket

def check_dns(domain):
    try:
        socket.gethostbyname(domain)
        return True
    except socket.gaierror:
        return False

domain = "example.com"
if check_dns(domain):
    print(f"{domain} DNS解析正常")
else:
    print(f"{domain} DNS解析失败")

import requests

def check_http(domain):
    try:
        response = requests.get(f"http://{domain}", timeout=5)
        if response.status_code == 200:
            return True
    except requests.RequestException:
        pass
    return False

domain = "example.com"
if check_http(domain):
    print(f"{domain} HTTP访问正常")
else:
    print(f"{domain} HTTP访问失败")

import requests

def check_proxy(domain, proxy):
    try:
        response = requests.get(f"http://{domain}", proxies={"http": proxy, "https": proxy}, timeout=5)
        if response.status_code == 200:
            return True
    except requests.RequestException:
        pass
    return False

domain = "example.com"
proxy = "http://your_proxy_server:port"
if check_proxy(domain, proxy):
    print(f"{domain} 通过代理访问正常")
else:
    print(f"{domain} 通过代理访问失败")