What is NewsBlur?

NewsBlur is a bot in the feed fetchers category, operated by NewsBlur.

Bot name
NewsBlur
Operator
NewsBlur
Type
Bot
Respects robots.txt
Not confirmed
robots.txt user agent
NewsBlur
Signs requests (Web Bot Auth)
No

About NewsBlur

RSS News fetcher

Feed fetchers poll RSS and Atom feeds for readers, aggregators and podcast apps. They usually request feeds only, so they are cheap to allow. Watch for fetchers that pull full pages at high rates.

NewsBlur user agent

NewsBlur identifies itself with this user agent string:

  • NewsBlur Feed Fetcher

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 NewsBlur in robots.txt

We have not confirmed whether NewsBlur 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 NewsBlur from the whole site

User-agent: NewsBlur
Disallow: /

Block NewsBlur from some folders

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

Allow NewsBlur only on some folders

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

Allow NewsBlur and block other crawlers

User-agent: NewsBlur
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: NewsBlur group, NewsBlur ignores your User-agent: * rules, so repeat any that should still apply.
  • The user agent name is not case sensitive. We take NewsBlur from NewsBlur's user agent; check NewsBlur'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. NewsBlur may not follow the rule. robots.txt is a request that nothing enforces, and we have not confirmed that NewsBlur 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 NewsBlur's user agent, and a scraper using it is not bound by NewsBlur's robots.txt policy. Only checking the source network tells a real NewsBlur from a fake one.

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

Who should care about NewsBlur

Publishers

NewsBlur fetches pages when your links are shared or syndicated. Keep it allowed so previews and feeds work, but leave it out of page views and ad requests.

Transfon Security for publishers

Media buyers and advertisers

When ads or posts are shared, NewsBlur fetches the landing page. Those hits are not clicks, so keep them out of campaign reports.

Transfon Security for advertisers

E-commerce

Product links shared in chats and feeds are fetched by NewsBlur. Keep it allowed so previews show the right image and price.

Transfon Security for e-commerce

SaaS and APIs

Allow NewsBlur on public pages so shared links preview well, and keep it off the app.

Transfon Security for SaaS and APIs

Block NewsBlur with Transfon Security

robots.txt is a request, not an enforcement. Transfon Security shows NewsBlur 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 NewsBlur on your site

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

Frequently asked questions

What is NewsBlur?

NewsBlur is a bot in the feed fetchers category, operated by NewsBlur. RSS News fetcher

Does NewsBlur respect robots.txt?

We have not confirmed whether NewsBlur 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 NewsBlur?

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

Is robots.txt enough to block NewsBlur?

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

Should I block NewsBlur?

Feed fetchers poll RSS and Atom feeds for readers, aggregators and podcast apps. They usually request feeds only, so they are cheap to allow. Watch for fetchers that pull full pages at high rates.

Related bots

All feed fetchers · 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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