What is Linespider?

Linespider is a bot in the search engine crawlers category, operated by LINE Corporation.

Bot name
Linespider
Operator
LINE Corporation
Type
Bot
Respects robots.txt
Yes
robots.txt user agent
Linespider
Signs requests (Web Bot Auth)
No

About Linespider

Linespider is a Web crawler that provides a wide range of search results for LINE services while complying with the Robots Exclusion Protocol. https://help2.line.me/linesearchbot/web/?contentId=50006055&lang=en

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.

Linespider user agent

Linespider identifies itself with this user agent string:

  • Linespider

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 Linespider in robots.txt

Linespider follows robots.txt, so these rules stop it crawling the paths you choose. robots.txt is a plain text file at the root of your domain, such as https://example.com/robots.txt.

Block Linespider from the whole site

User-agent: Linespider
Disallow: /

Block Linespider from some folders

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

Allow Linespider only on some folders

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

Allow Linespider and block other crawlers

User-agent: Linespider
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: Linespider group, Linespider ignores your User-agent: * rules, so repeat any that should still apply.
  • The user agent name is not case sensitive. We take Linespider from Linespider's user agent; check LINE Corporation'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. Linespider may not follow the rule. Linespider says it follows robots.txt, but nothing enforces that. Changes can take a day to apply, the operator can change its policy, and other crawlers from LINE Corporation use different names and rules.
  2. The user agent could be fake. robots.txt matches the name a request claims. Anyone can send Linespider's user agent, and a scraper using it is not bound by LINE Corporation's robots.txt policy. Only checking the source network tells a real Linespider from a fake one.

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

Who should care about Linespider

Publishers

Linespider brings search traffic, so keep the real one allowed. Fake Linespider requests are a common cover for scrapers, so verify it by network rather than by name.

Transfon Security for publishers

Media buyers and advertisers

Search crawlers fetch landing pages to check them. Keep Linespider allowed, but out of campaign and conversion data.

Transfon Security for advertisers

E-commerce

Linespider indexes products for search results. Allow it, and block impersonators that use its name to scrape prices.

Transfon Security for e-commerce

SaaS and APIs

Allow Linespider on marketing and docs pages, and keep it off signed-in app pages it cannot use.

Transfon Security for SaaS and APIs

Block Linespider with Transfon Security

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

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

Frequently asked questions

What is Linespider?

Linespider is a bot in the search engine crawlers category, operated by LINE Corporation. Linespider is a Web crawler that provides a wide range of search results for LINE services while complying with the Robots Exclusion Protocol. https://help2.line.me/linesearchbot/web/?contentId=50006055&lang=en

Does Linespider respect robots.txt?

Yes. Linespider follows robots.txt, so a Disallow rule for the Linespider user agent stops it from crawling the paths you list.

How do I block Linespider?

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

Is robots.txt enough to block Linespider?

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

Should I block Linespider?

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.

Related bots

All search engine 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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