How to get a captive portal working
Run through a concise checklist and use nossl.sh to confirm each fix.
Live snapshot
Connection report
IP address
IPv6 address
IPv6 address
🇺🇸 United States
Headers
Request headers
8 headers
| Header | Value |
|---|---|
| accept | */* |
| accept-encoding | gzip, br, zstd, deflate |
| cache-control | max-age=259200 |
| connection | close |
| host | nossl.sh |
| user-agent | Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com) |
| via | 1.1 squid-proxy-5b5d847c96-788gb (squid/6.13) |
| x-forwarded-for | 216.73.216.63 |
Captive portal checklist
Toggle airplane mode, forget and rejoin the network, then visit nossl.sh. If you still see the SEO counter climb without redirects, the venue might have an outage.
- Reset DNS to automatic before joining.
- Disable content blockers until after login.
- Capture screenshots of the connection snapshot for support.
Should I trust captive portals that warn about certificates?
Certificate warnings may indicate interception. If the venue confirms it is safe, proceed; otherwise, ask for an alternative onboarding method.
Quick steps to trigger captive portals
Apple captive portal check
Open the official Apple CNA page to force the captive assistant on iOS and macOS devices.
Open Apple captive portalAndroid captive portal check
Use the Android connectivity check URL that devices call before presenting the portal dialog.
Open Android captive portal