Fix Xfinity / Comcast Blocking Our Website (ISP-Level False Positive)

We’re dealing with a false-positive security block by Xfinity / Comcast Advanced Security on our website (renlar.com). Xfinity has confirmed there is no global blacklist, but some users still see the site blocked at the router / ISP security layer. We need this permanently resolved, not manually whitelisted per user. What we need We’re looking for someone who has direct experience fixing ISP-level security false positives, specifically: Xfinity / Comcast Advanced Security ISP DNS / gateway-level blocking Domain & IP reputation cleanup Cloudflare configuration for ISP trust Security headers, HTTPS, and JS audit This is not a malware issue and not an SEO task. Scope of Work You will be responsible for: Diagnosing why Xfinity is flagging the domain Implementing a permanent fix so Xfinity users can access the site without manual allow-listing Cloudflare setup or optimization (if needed) IP reputation / hosting audit Security headers & HTTPS validation JS / tracking / form behavior review Verifying resolution from an Xfinity network Success Criteria renlar.com loads normally on Xfinity connections No Advanced Security blocks for end users No manual router exceptions required Requirements (Read Carefully) Please apply only if you have: Resolved Xfinity / Comcast Advanced Security false positives before Strong understanding of ISP-level filtering (not just Google Safe Browsing) Experience with Cloudflare, WAFs, and domain reputation issues Ability to explain why the issue occurred and how it was fixed If you’ve never dealt with Xfinity specifically, this is probably not a fit. Apply tot his job Apply To this Job