What is TNOThesisCrawler?

TNOThesisCrawler is a bot in the academic research crawlers category, operated by TNO.

Bot name
TNOThesisCrawler
Operator
TNO
Type
Bot
Respects robots.txt
Not confirmed
robots.txt user agent
TNOThesisCrawler
Signs requests (Web Bot Auth)
Yes

About TNOThesisCrawler

Research crawler by TNO collecting publicly available academic theses from university websites for the DIAMONDS platform

Research crawlers collect pages for university and non-profit studies of the web. Most are low volume and respect robots.txt. Block them there if you prefer not to take part.

TNOThesisCrawler user agent

TNOThesisCrawler identifies itself with this user agent string:

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.

How to block TNOThesisCrawler in robots.txt

We have not confirmed whether TNOThesisCrawler 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.

Block TNOThesisCrawler from the whole site

User-agent: TNOThesisCrawler
Disallow: /

Block TNOThesisCrawler from some folders

User-agent: TNOThesisCrawler
Disallow: /private/
Disallow: /search

Allow TNOThesisCrawler only on some folders

User-agent: TNOThesisCrawler
Allow: /blog/
Disallow: /

Allow TNOThesisCrawler and block other crawlers

User-agent: TNOThesisCrawler
Allow: /

User-agent: *
Disallow: /

Things to know

  • Each host needs its own file. Rules on www.example.com do not apply to shop.example.com.
  • A crawler obeys only the most specific group that names it. Once you add a User-agent: TNOThesisCrawler group, TNOThesisCrawler ignores your User-agent: * rules, so repeat any that should still apply.
  • The user agent name is not case sensitive. We take TNOThesisCrawler from TNOThesisCrawler's user agent; check TNO's own documentation if it publishes a different robots.txt name.
  • Crawlers cache robots.txt, so changes can take up to a day to apply. Disallow stops crawling but does not remove pages already collected or indexed.

Limits of robots.txt

  1. TNOThesisCrawler may not follow the rule. robots.txt is a request that nothing enforces, and we have not confirmed that TNOThesisCrawler follows it. Check your logs after adding a rule.
  2. The user agent could be fake. robots.txt matches the name a request claims. Anyone can send TNOThesisCrawler's user agent, and a scraper using it is not bound by TNO's robots.txt policy. Only checking the source network tells a real TNOThesisCrawler from a fake one.

Treat robots.txt as a statement of your policy, and enforce it where requests arrive.

Who should care about TNOThesisCrawler

Publishers

Allow TNOThesisCrawler if it is a service you use, and keep its visits out of page views and ad requests either way.

Transfon Security for publishers

Media buyers and advertisers

TNOThesisCrawler is not a person. Exclude it from campaign and conversion data so reports reflect real visitors.

Transfon Security for advertisers

E-commerce

Allow TNOThesisCrawler only if it works for your store, and keep it away from cart and checkout.

Transfon Security for e-commerce

SaaS and APIs

If TNOThesisCrawler is a service you use, allow it on the endpoints it needs and block it elsewhere.

Transfon Security for SaaS and APIs

Block TNOThesisCrawler with Transfon Security

robots.txt is a request, not an enforcement. Transfon Security shows TNOThesisCrawler 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

Control TNOThesisCrawler on your site

  • See every TNOThesisCrawler visit and the pages it reads
  • Spot bots that fake trusted crawler names
  • Block, allow or rate limit TNOThesisCrawler with one rule
  • Works with or without robots.txt support

Frequently asked questions

What is TNOThesisCrawler?

TNOThesisCrawler is a bot in the academic research crawlers category, operated by TNO. Research crawler by TNO collecting publicly available academic theses from university websites for the DIAMONDS platform

Does TNOThesisCrawler respect robots.txt?

We have not confirmed whether TNOThesisCrawler 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.

How do I block TNOThesisCrawler?

Add "User-agent: TNOThesisCrawler" followed by "Disallow: /" to the robots.txt file at the root of your site. To enforce it, block requests whose user agent contains "TNOThesisCrawler" at your WAF. In Transfon Security that is one User Agent block rule.

Is robots.txt enough to block TNOThesisCrawler?

No. robots.txt is voluntary, so TNOThesisCrawler may not follow it, and anyone can send TNOThesisCrawler's user agent, so a fake TNOThesisCrawler ignores your rule. Enforce the rule where requests arrive, at your WAF, and check the source network.

Should I block TNOThesisCrawler?

Research crawlers collect pages for university and non-profit studies of the web. Most are low volume and respect robots.txt. Block them there if you prefer not to take part.

Related bots

All academic research crawlers · Full bot directory

See Which Bots Visit Your Site

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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