BYTESPIDER
MEDIUM RISK🔍 SEARCH & AI CRAWLERByteDance's aggressive web crawler — one of the most active bots on the internet
📡 BYTESPIDER USER-AGENT STRING
Mozilla/5.0 (Linux; Android 5.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.66 Mobile Safari/537.36 (compatible; Bytespider; spider-feedback@bytedance.com)
This is the User-Agent header sent by Bytespider in HTTP requests. Use this to identify Bytespider in your server access logs.
📋 ABOUT BYTESPIDER
Bytespider is ByteDance's web crawler and one of the most aggressive bots operating on the internet today. ByteDance, the Chinese technology company behind TikTok, operates Bytespider to collect massive amounts of web data for its various products and AI training initiatives. Bytespider has been consistently identified as one of the highest-volume crawlers across the web.
Bytespider's reputation among webmasters is mixed due to its aggressive crawling behavior. The bot is known for high request rates that can strain server resources, incomplete robots.txt compliance, and limited transparency about how collected data is used. Unlike Google, Microsoft, or OpenAI, ByteDance does not publish detailed documentation about Bytespider's behavior or provide clear opt-out mechanisms beyond robots.txt.
NORAD.io classifies Bytespider as medium risk due to its aggressive crawling patterns and limited transparency. The NORAD radar network monitors Bytespider activity globally and provides site operators with tools to detect, rate-limit, or block Bytespider access. For sites experiencing performance issues from Bytespider, NORAD recommends IP-level blocking in addition to robots.txt directives.
🎯 HOW TO DETECT BYTESPIDER
- ▸User-Agent contains 'Bytespider' or references spider-feedback@bytedance.com
- ▸Often crawls from Chinese IP ranges (110.249.x.x, 111.225.x.x, 60.8.x.x)
- ▸Extremely high request rates — can generate hundreds of requests per minute
- ▸May use mobile User-Agent strings that mimic real browser traffic
- ▸Sometimes rotates User-Agent strings to avoid detection
- ▸IP-level blocking is more reliable than robots.txt for Bytespider
🌐 BYTESPIDER KNOWN IP RANGES
110.249.201.0/24110.249.202.0/2460.8.123.0/24111.225.148.0/24111.225.149.0/24Use these CIDR ranges to verify Bytespider identity at the network level. Always combine with User-Agent verification for accurate detection.
🔄 CRAWL BEHAVIOR
Highly aggressive crawling with very high request rates. Known to ignore or partially respect robots.txt. Crawls from large pools of Chinese IP addresses. Can generate significant server load. Often crawls at rates far exceeding polite crawling norms.
Collects web data for ByteDance's products including TikTok, Douyin, Toutiao, and ByteDance's AI/LLM training efforts. The exact data usage is not publicly documented.
🤖 ROBOTS.TXT CONFIGURATION
User-agent: Bytespider Disallow: / # Bytespider may not fully respect this directive. # Consider IP-level blocking for complete protection.
⚠ Bytespider may not fully respect robots.txt. Consider supplementing with IP-level blocking or bot detection middleware.
🗺️ WHERE IS BYTESPIDER ACTIVE?
⚠️ RELATED THREATS
Attempts to override bot instructions via malicious content embedded in web pages
Data ExfiltrationBots attempting to extract sensitive data from websites including PII and credentials
Credential StuffingAutomated login attempts using leaked credentials from data breaches
Aggressive Content ScrapingBots aggressively scraping content beyond robots.txt limits and ToS
📂 MORE 🔍 SEARCH & AI CRAWLERS
📚 RELATED GUIDES
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