User-agent: *

Disallow: /search/*
Disallow: /feedback/*
Disallow: /*?q=*
Disallow: /*?ref
Disallow: *utm_
Disallow: *?src_src=
Disallow: *?mdrv=
Disallow: *?fbclid=
Disallow: *?auth_reset_password=
Disallow: *?auth_verify_email=
Disallow: *?google_redirect=
Disallow: *?pipa_verify_email=
Disallow: /*?origin=
Disallow: /*?_pmch=
Disallow: /*?user_email=
Disallow: /*?ct=
Disallow: /*?_hsenc=
Disallow: /*?gtm_latency=
Disallow: /*?sa=
Disallow: /*?src_cmp=
Disallow: /*?gad_source=
Disallow: /*?lgs=
Disallow: /*?sfnsn=
Disallow: /*?est=
Disallow: /*?brid=
Disallow: /*?next=
Disallow: /*?ad=

User-agent: Twitterbot
Allow: /*?*utm_

User-agent: facebookexternalhit
Allow: /*?*utm_

# AI retrieval crawlers — ALLOW
User-agent: OAI-SearchBot
Allow: /

User-agent: PerplexityBot
Allow: /

User-agent: ClaudeBot
Allow: /

User-agent: Google-Extended
Allow: /

# AI training crawlers — BLOCK if desired
User-agent: GPTBot
Disallow: /

User-agent: anthropic-ai
Disallow: /

User-agent: AwarioRssBot
User-agent: AwarioSmartBot
Disallow: /

User-agent: Bytespider
Disallow: /

User-agent: CCBot
Disallow: /

User-agent: cohere-ai
Disallow: /

User-agent: DataForSeoBot
Disallow: /

User-agent: Diffbot
Disallow: /

User-agent: FriendlyCrawler
Disallow: /

User-agent: ImagesiftBot
Disallow: /

User-agent: magpie-crawler
Disallow: /

User-agent: Meta-ExternalAgent
User-agent: meta-externalagent
Disallow: /

User-agent: NewsNow
Disallow: /

User-agent: news-please
Disallow: /

User-agent: omgili
Disallow: /

User-agent: omgilibot
Disallow: /

User-agent: peer39_crawler
User-agent: peer39_crawler/1.0
Disallow: /

User-agent: Quora-Bot
Disallow: /

User-agent: Scrapy
Disallow: /

User-agent: TurnitinBot
Disallow: /

Sitemap: https://www.ntd.com/sitemap/sitemap.xml.gz
Sitemap: https://www.ntd.com/sitemap/sitemap_news.xml.gz
Sitemap: https://www.ntd.com/sitemap/sitemap_allvideos.xml.gz