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关于V2EX 提供的 Android Captive Portal Server 地址的更新
https://www.v2ex.com/t/303889
CAPTIVE_PORTAL_SERVER
adb shell "settings put global captive_portal_http_url http://captive.v2ex.co/generate_204";
adb shell "settings put global captive_portal_https_url https://captive.v2ex.co/generate_204";