Key takeaway
Do not send data through unknown proxies or VPNs; if the block is policy-based, contact the network owner.
Identify why access is blocked
Record the error and domain and check service status. Use another trusted connection only for authorized diagnosis that follows network policy. If one device is affected, inspect browser extensions, cache, site data and DNS cache. Avoid indiscriminate deletion: clearing site data can sign users out.
| Symptom | Check | Action |
|---|---|---|
| Policy block | Record category and domain | Request an owner-approved exception |
| DNS or name failure | Check resolver and service status | Make an authorized correction with rollback |
| TLS or private-connection warning | Check clock, domain, site and network | Stop sensitive entry and contact the owner |
| Dangerous-site warning | Do not proceed or disable protection | Report for review |
Safe checks on a personal device
Update the browser and operating system, check the device clock and retry on a trusted connection. If DNS appears to be the problem, inspect resolver settings on the device or router and record the current values before changing them. A VPN provides an encrypted tunnel to its provider; a proxy reroutes traffic through another server and does not by itself guarantee encryption. Consider service trustworthiness, network policy and the path of sensitive data.
Choose a lawful, trusted remedy
Tor uses multiple hops to support privacy but does not guarantee anonymity. A public proxy may simply relay traffic through another operator; never enter credentials into an unknown service. Connecting by raw IP can break hostname, TLS certificate and virtual-host checks while masking the cause. For travel or regional restrictions, prefer an official alternative and the service’s support channel.
Check device-specific settings
On a computer, check the browser proxy setting and the operating system’s DNS or network profile. On a phone, forgetting and rejoining Wi‑Fi with a trusted password, then comparing it with mobile data, can narrow down the cause. Change a browser extension or family-filter rule only with the setting owner’s approval.