🤖 Overview

ksbot is a legitimate web crawler operated by Kuaishou Technology (Beijing Kuaishou Technology Co., Ltd.), the Chinese company behind the Kuaishou short-video and live-streaming platform (similar to TikTok’s Douyin). According to Kuaishou’s official developer documentation and publicly available information, ksbot is used to index web content for Kuaishou’s search engine, as well as to collect training data for its proprietary AI models, including recommendation systems and natural language processing (NLP) modules. The crawler was first observed in late 2018 and has been continuously active on global web servers, particularly those serving Chinese-language content.

🌐 Technical Behavior

ksbot performs HTTP/HTTPS GET requests with a default crawl frequency reported at approximately 1–3 requests per second per IP, though it may temporarily burst to higher rates during initial discovery phases. Its requests originate from a range of IPv4 addresses allocated to Kuaishou via ASN 138195 (Kuaishou Technology) and also from IP blocks belonging to major Chinese cloud providers such as Alibaba Cloud (ASN 37963) and Tencent Cloud (ASN 132203), based on third-party crawler monitoring platforms like CrawlerList and User-Agent.io. The bot supports both HTTP/1.1 and HTTP/2 protocols, sends standard Accept and Accept-Language headers (typically zh-CN), and does not include any special cookies or session tokens. Ksbot follows Link headers and sitemap.xml files but does not appear to execute JavaScript; it parses only static HTML. No known CVE entries or security advisories are associated with ksbot—it is a well-behaved commercial crawler.

📋 robots.txt Compliance

Official documentation from Kuaishou (available at https://www.kuaishou.com/robots.txt and referenced in their developer portal) states that ksbot respects Disallow directives in robots.txt files. Web administration communities (e.g., on Stack Overflow and server logs) confirm that blocking User-agent: ksbot reliably stops its activity within 24–48 hours. However, some operators report that ksbot may ignore Crawl-delay directives if set below 5 seconds, falling back to its internal rate limit.

🔍 Detection Indicators

The primary User-Agent string is Mozilla/5.0 (compatible; KSbot/1.0; +https://www.kuaishou.com/help/content/help_1046.html), though variants with version numbers like KSbot/2.0 have been observed in 2024. Behavioral fingerprints include sequential IP access from the same ASN, consistent Accept-Language: zh-CN,zh;q=0.9 header, and a lack of Referer or User-Agent randomization. Reverse DNS lookups on requesting IPs often resolve to *.kuaishou.com or generic cloud hostnames.

📊 Data Usage

Collected data serves two primary purposes: (1) indexing web pages for Kuaishou’s in-app search feature (which allows users to find external links and content), and (2) training Kuaishou’s AI models, including its recommendation engine and language models used for content moderation and summarization. Kuaishou’s privacy policy (updated June 2023) states that public data is aggregated and anonymized before use.

⚙️ Rate Limiting Policy

Although ksbot is legitimate, its burst behavior during initial crawls can temporarily degrade server performance on shared hosting environments, justifying a rate limit of 5 requests per second per IP. Web administrators should apply threshold-based blocking (e.g., via Fail2Ban or .htaccess) only after verifying that ksbot is exceeding typical polite crawl rates, as its default behavior is generally considerate.

ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the bots listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.