Having trouble accessing Hullproof?
Some corporate networks block new or uncategorized domains by default. This page will help you or your IT department resolve the issue.
Quick fix: try a different network
Open hullproof.com on your mobile phone using cellular data (not WiFi). If the site loads normally, the issue is your corporate firewall or web filter. Share this page with your IT department so they can whitelist the domain.
Information for IT administrators
Please whitelist the following domains and IP addresses to allow access to Hullproof.
Hullproof hosting domains:
Required third-party services (critical — app will not work without these):
WebSocket endpoints (real-time data):
Optional services (app degrades gracefully):
IP addresses (Vercel edge network):
SSL certificate
- Issuer: Let's Encrypt (R12)
- Subject: hullproof.com
- Protocol: TLS 1.2 / TLS 1.3
Ports required
- HTTPS (443) — primary
- HTTP (80) — redirects to HTTPS
Web categorization
- Category: Business / Technology / Maritime Software
- Content: Safe for enterprise use
- No user tracking, no advertising, no third party data sharing
Common error messages
| Error | Likely cause |
|---|---|
| HTTP 403 — Access Denied | Corporate web filter blocking the domain as uncategorized or restricted |
| ERR_CONNECTION_REFUSED | Firewall blocking outbound connections to this domain |
| ERR_NAME_NOT_RESOLVED | DNS filtering preventing the domain from resolving |
| SSL / TLS handshake error | SSL inspection proxy not trusting the Let’s Encrypt certificate |
| Blank page or timeout | Network proxy not forwarding the request to the server |
Alternative access
If hullproof.com is blocked on your network, you can access the same application through our hosting provider's domain:
Open via hullproof-dashboard.vercel.appThis is the exact same application, hosted on Vercel's infrastructure.
Still need help?
Contact us at support@hullproof.com or reach out on LinkedIn and we will help you get connected.
You can share this page directly with your IT department.