github-camo
GitHub image proxy fetching external images for secure rendering
About this crawler
github-camo is a web crawler identified by the regular-expression pattern github-camo in the User-Agent request header. It is categorised as social-preview. Use the regex above to detect, log, allow, or block github-camo traffic in your web server, CDN edge rules, or robots.txt.
Block-rate · top 25k sites
No block-rate data for this crawler.
Technical details
- Name
- github-camo
- Pattern
github-camo- Tags
- social-preview
- Reference
- https://github.com/atmos/camo
- Added
- 2026/04/17
- rDNS suffixes
.github.com,.githubapp.com,.githubusercontent.com- Instances
- 1 known sample(s)
rDNS verification (FCrDNS)
Verify a request is genuinely github-camo 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.
.github.com.githubapp.com.githubusercontent.com
Sample User-Agent strings
github-camo (c006e452)
Block this crawler
robots.txt — disallow github-camo:
User-agent: github-camo
Disallow: /
Apache .htaccess — return 403:
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} github-camo [NC]
RewriteRule .* - [F,L]
Nginx — return 403 inside a server block:
if ($http_user_agent ~* "github-camo") {
return 403;
}
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