01 · Operator
Who operates CoralWebPrx
- Type
- Other bot
- Official docs
- read.seas.harvard.edu
02 · Behavior
What CoralWebPrx does
CoralCDN let users fetch a site through its network by appending .nyud.net to a domain name. When no proxy had a cached copy, a proxy downloaded the object from the origin server. Proxies sent the User-Agent CoralWebPrx and identified themselves in Via headers.
03 · Impact
Why CoralWebPrx matters for your site
If you allow it
- Serves cached copies of your pages to users
- Reduces load during traffic spikes
If you block it
- Serves your content from third-party hosts
- Cached copies may be outdated
04 · Allow
How to allow CoralWebPrx
robots.txt
User-agent: CoralWebPrx
Allow: /Cloudflare
# Security › WAF › Custom rules › Create rule
Expression: (http.user_agent contains "CoralWebPrx")
Action: Skip › All Super Bot Fight Mode rules
# Also check Security › Bots: "Block AI bots" can block it regardless of robots.txt.WordPress
# WordPress serves a virtual robots.txt. Edit it with your SEO plugin:
# Yoast: SEO › Tools › File editor · Rank Math: General Settings › Edit robots.txt
User-agent: CoralWebPrx
Allow: /nginx
# nginx serves every user agent by default.
# Make sure no rule like this blocks it:
# if ($http_user_agent ~* "CoralWebPrx") { return 403; }Apache
# Apache serves every user agent by default.
# Make sure .htaccess has no rule like this:
# RewriteCond %{HTTP_USER_AGENT} CoralWebPrx [NC]
# RewriteRule .* - [F,L]05 · Block
How to block CoralWebPrx
Start with robots.txt. If CoralWebPrx keeps showing up in your logs, block it at your CDN or web server.
robots.txt
User-agent: CoralWebPrx
Disallow: /Cloudflare
# Security › WAF › Custom rules › Create rule
Expression: (http.user_agent contains "CoralWebPrx")
Action: BlockWordPress
# WordPress serves a virtual robots.txt. Edit it with your SEO plugin:
# Yoast: SEO › Tools › File editor · Rank Math: General Settings › Edit robots.txt
User-agent: CoralWebPrx
Disallow: /nginx
# In your server { } block:
if ($http_user_agent ~* "CoralWebPrx") {
return 403;
}Apache
# .htaccess
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} CoralWebPrx [NC]
RewriteRule .* - [F,L]
</IfModule>06 · User agents
User agents we see for CoralWebPrx
The operator does not publish a full user agent string. Requests contain the token “CoralWebPrx”.
07 · Verification
Is it really CoralWebPrx?
CoralWebPrx’s operator publishes no IP ranges or hostnames, so requests cannot be verified. Treat the user agent as a claim, and watch your logs for unusual request rates.
FAQ
Questions about CoralWebPrx
What is CoralWebPrx?
It is the User-Agent string used by CoralCDN proxies when they fetch content from origin servers.
Is CoralWebPrx a crawler?
No. It fetches pages on demand when users request them through the CoralCDN network.
Last reviewed Oct 7, 2026