LibraryOfCongressWebArchiving is a bot in the academic research crawlers category, operated by United States Library of Congress.
The Library of Congress Web Archive manages, preserves, and provides access to archived web content selected by subject experts from across the Library, so that it will be available for researchers today and in the future. More information on the programme here: https://www.loc.gov/programs/web-archiving/about-this-program/ And information about crawling policy here: https://www.loc.gov/programs/web-archiving/for-site-owners/
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.
LibraryOfCongressWebArchiving identifies itself with this user agent string:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.97 Safari/537.36 (+https://www.loc.gov/programs/web-archiving/for-site-owners/)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 LibraryOfCongressWebArchiving 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: LibraryOfCongressWebArchiving Disallow: /
User-agent: LibraryOfCongressWebArchiving Disallow: /private/ Disallow: /search
User-agent: LibraryOfCongressWebArchiving Allow: /blog/ Disallow: /
User-agent: LibraryOfCongressWebArchiving Allow: / User-agent: * Disallow: /
User-agent: LibraryOfCongressWebArchiving group, LibraryOfCongressWebArchiving ignores your User-agent: * rules, so repeat any that should still apply.LibraryOfCongressWebArchiving from LibraryOfCongressWebArchiving's user agent; check United States Library of Congress'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.
Allow LibraryOfCongressWebArchiving if it is a service you use, and keep its visits out of page views and ad requests either way.
Transfon Security for publishersLibraryOfCongressWebArchiving is not a person. Exclude it from campaign and conversion data so reports reflect real visitors.
Transfon Security for advertisersAllow LibraryOfCongressWebArchiving only if it works for your store, and keep it away from cart and checkout.
Transfon Security for e-commerceIf LibraryOfCongressWebArchiving is a service you use, allow it on the endpoints it needs and block it elsewhere.
Transfon Security for SaaS and APIsrobots.txt is a request, not an enforcement. Transfon Security shows LibraryOfCongressWebArchiving 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
LibraryOfCongressWebArchiving is a bot in the academic research crawlers category, operated by United States Library of Congress. The Library of Congress Web Archive manages, preserves, and provides access to archived web content selected by subject experts from across the Library, so that it will be available for researchers today and in the future. More information on the programme here: https://www.loc.gov/programs/web-archiving/about-this-program/ And information about crawling policy here: https://www.loc.gov/programs/web-archiving/for-site-owners/
We have not confirmed whether LibraryOfCongressWebArchiving 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: LibraryOfCongressWebArchiving" followed by "Disallow: /" to the robots.txt file at the root of your site. To enforce it, block requests whose user agent contains "https://www.loc.gov/programs/web-archiving/for-site-owners/" at your WAF. In Transfon Security that is one User Agent block rule.
No. robots.txt is voluntary, so LibraryOfCongressWebArchiving may not follow it, and anyone can send LibraryOfCongressWebArchiving's user agent, so a fake LibraryOfCongressWebArchiving ignores your rule. Enforce the rule where requests arrive, at your WAF, and check the source network.
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.
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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