IA
ia_archiver
Internet Archive Wayback Machine web crawler
About this crawler
ia_archiver is a web crawler identified by the regular-expression pattern ia_archiver in the User-Agent request header. It is categorised as archiver. Use the regex above to detect, log, allow, or block ia_archiver traffic in your web server, CDN edge rules, or robots.txt.
Block-rate · top 25k sites
5.2%
Technical details
- Name
- ia_archiver
- Pattern
ia_archiver- Tags
- archiver
- rDNS suffixes
.archive.org,.internetarchive.org- Instances
- 2 known sample(s)
rDNS verification (FCrDNS)
Verify a request is genuinely ia_archiver with forward-confirmed reverse DNS: the client IP's PTR record must end in one of the suffixes below and a forward A/AAAA lookup of that hostname must return the same IP. UA strings alone are spoofable; FCrDNS is not.
.archive.org.internetarchive.org
Sample User-Agent strings
ia_archiver (+http://www.alexa.com/site/help/webmasters; [email protected])
ia_archiver-web.archive.org
Block this crawler
robots.txt — disallow ia_archiver:
User-agent: ia_archiver
Disallow: /
Apache .htaccess — return 403:
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} ia_archiver [NC]
RewriteRule .* - [F,L]
Nginx — return 403 inside a server block:
if ($http_user_agent ~* "ia_archiver") {
return 403;
}
← back to all crawlers