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Users Behind Proxies Cannot See My Site
If some visitors (particularly those on corporate networks, behind university firewalls, or using proxy servers) cannot access your site while others can, there are a few possible causes.
Firewall Blocking Proxy IPs
Our server firewall may be blocking the IP address of the proxy server these visitors are using. This can happen if the proxy IP triggered a security rule at some point (many proxy and VPN IPs have bad reputations from previous abuse). Contact support with the visitor's IP address and we can check if it is blocked and whitelist it if appropriate.
Hotlink Protection or .htaccess Rules
If you have hotlink protection enabled in cPanel, or if your .htaccess file has referrer-based rules, proxy users may be blocked because the proxy strips or modifies the HTTP referrer header. Review your .htaccess rules and cPanel hotlink protection settings.
Caching Issues
Corporate proxy servers often cache web pages aggressively. If your site recently changed IP addresses or DNS records, proxy caches may still hold the old information. Unfortunately you cannot clear someone else's proxy cache, but the issue resolves itself as the cache expires (usually within 24 hours).
