VPN Doctor
One-click connectivity health check (no install).
This page runs safe, browser-only diagnostics to help IT understand why VPN access breaks or behaves oddly.
- Public IP — detects exit-node/full-tunnel changes.
- HTTPS 204 — catches captive portals & HTTPS-only networks.
- WebRTC STUN — checks UDP/NAT traversal (host / srflx / relay).
- DNS over HTTPS — quick sanity vs public resolvers.
Nothing is installed. No credentials collected. Share the report with IT if needed.
Split-tunnel checker
?
Step 1: Save a baseline before connecting VPN.
Step 2: Connect VPN (or enable exit node) and press compare.
We compare Public IP, ICE, and DoH answers to infer full-tunnel vs split-tunnel.
Step 2: Connect VPN (or enable exit node) and press compare.
We compare Public IP, ICE, and DoH answers to infer full-tunnel vs split-tunnel.
Organization presets (optional)
?
Paste internal hosts or URLs (one per line). We’ll probe them from your browser using a safe favicon trick (no credentials).
Tip: for plain hostnames we try both
Tip: for plain hostnames we try both
http:// and https://.
Up to 10 lines.
Custom reachability
?
Quickly test if a host answers from your browser. We try to load
/favicon.ico. Green = reachable, red = blocked (CORS not involved).
Enter up to 8 URLs (http/https), comma-separated.