yacybot is a bot in the search engine crawlers category, operated by YaCy.
yacybot is the crawler of YaCy, a decentralised, peer to peer search engine that anyone can run.
Search engine crawlers index your pages so they can appear in search results. Keep the genuine ones allowed and verify them, because fake search crawlers are one of the most common disguises for scrapers.
Anyone can copy a user agent string. Transfon Security also checks where each request comes from, so a request that claims to be a known crawler but comes from the wrong network is treated as a fake, not as the real crawler.
We have not confirmed whether yacybot follows robots.txt. Add a rule, then check your logs to see that it stopped. robots.txt is a plain text file at the root of your domain, such as https://example.com/robots.txt.
User-agent: yacybot Disallow: /
User-agent: yacybot Disallow: /private/ Disallow: /search
User-agent: yacybot Allow: /blog/ Disallow: /
User-agent: yacybot Allow: / User-agent: * Disallow: /
User-agent: yacybot group, yacybot ignores your User-agent: * rules, so repeat any that should still apply.yacybot from yacybot's user agent; check YaCy's own documentation if it publishes a different robots.txt name.Treat robots.txt as a statement of your policy, and enforce it where requests arrive.
yacybot brings search traffic, so keep the real one allowed. Fake yacybot requests are a common cover for scrapers, so verify it by network rather than by name.
Transfon Security for publishersSearch crawlers fetch landing pages to check them. Keep yacybot allowed, but out of campaign and conversion data.
Transfon Security for advertisersyacybot indexes products for search results. Allow it, and block impersonators that use its name to scrape prices.
Transfon Security for e-commerceAllow yacybot on marketing and docs pages, and keep it off signed-in app pages it cannot use.
Transfon Security for SaaS and APIsrobots.txt is a request, not an enforcement. Transfon Security shows yacybot by name in the Top Bots report, so you can see how often it visits and which pages it reads. Block or allow it with a User Agent rule, or slow it down with a rate limit decision rule.
Transfon Security
yacybot is a bot in the search engine crawlers category, operated by YaCy. yacybot is the crawler of YaCy, a decentralised, peer to peer search engine that anyone can run.
We have not confirmed whether yacybot follows robots.txt. Add a robots.txt rule, then check your logs to see that it stopped, and block it by user agent if it did not.
Add "User-agent: yacybot" followed by "Disallow: /" to the robots.txt file at the root of your site. To enforce it, block requests whose user agent contains "yacybot" at your WAF. In Transfon Security that is one User Agent block rule.
No. robots.txt is voluntary, so yacybot may not follow it, and anyone can send yacybot's user agent, so a fake yacybot ignores your rule. Enforce the rule where requests arrive, at your WAF, and check the source network.
Search engine crawlers index your pages so they can appear in search results. Keep the genuine ones allowed and verify them, because fake search crawlers are one of the most common disguises for scrapers.
Transfon Security identifies every bot in this directory in your traffic reports, flags fake search crawlers, and lets you allow, block or rate limit each bot.
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