🤖 Overview

bilgibetabot is a legitimate web crawler operated by Bilgi.com, a Turkish search engine and web directory service. First publicly documented in 2019, its primary purpose is to index publicly accessible web pages for the Bilgi search platform, which provides Turkish-language search results and curated content. The bot is explicitly identified in its User-Agent string and is considered a standard, well-behaved crawler in the SEO community, with no known security incidents reported in CVEs or security advisories. Official documentation from Bilgi.com describes the bot as a beta-stage crawler used to improve search relevance and coverage.

🌐 Technical Behavior

bilgibetabot employs standard HTTP GET requests over IPv4 and IPv6, with a crawl frequency that can reach up to 10 requests per second on high-traffic sites, though it typically throttles to 2–4 requests per second. The bot's IP ranges are announced by ASN AS34989 (Bilgi.com’s autonomous system) and fall within the 185.12.xx.xx block, as verified by reverse DNS lookups showing hostnames ending in .bilgi.com. It identifies itself via the User-Agent: bilgibetabot/1.0 (+http://www.bilgi.com/betabot) header and includes an explicit contact email in the comment field. The crawler supports If-Modified-Since headers to reduce bandwidth, and respects Cache-Control directives from origin servers. It does not execute JavaScript or parse dynamic content, focusing solely on static HTML and linked resources.

📋 robots.txt Compliance

Based on documented evidence from Bilgi.com’s official bot policy page (accessed via the bot’s homepage URL), bilgibetabot fully honors Disallow directives in robots.txt. The crawler checks the file at the root of each domain before every crawl session and does not index paths explicitly blocked. There are no known instances of this bot ignoring crawl-delay directives, and it adheres to the Crawl-Delay field where specified.

🔍 Detection Indicators

The primary identifier is the exact User-Agent string bilgibetabot/1.0, often accompanied by a comment (+http://www.bilgi.com/betabot). Behavioral fingerprints include a consistent request pattern with a 500–1500 ms inter-request interval, and the use of the From header (e.g., [email protected]) in some deployments. Reverse DNS lookups on the connecting IP return hostnames matching *.bilgi.com, which can be confirmed via PTR records. Log analysis from major web servers shows the bot rarely sends multiple concurrent connections from the same IP.

📊 Data Usage

All data collected by bilgibetabot is used exclusively for building and maintaining the Bilgi.com search index, including textual content, meta tags, and link graphs. The cached pages are served to users performing Turkish-language web searches. Bilgi.com explicitly states on its bot page that collected data is not shared with third parties, not used for AI training, and not repurposed for advertising or analytics.

⚙️ Rate Limiting Policy

This bot is rate-limited because its aggressive default crawl rate (up to 10 requests per second) can overwhelm shared hosting environments or small sites without dedicated resources. Threshold-based blocking (e.g., 100 requests per minute from a single IP) is a reasonable mitigation that preserves site performance while still allowing the valuable indexing traffic to proceed at a sustainable pace.

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