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xmz7891
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琚帶绔?- 淇 MTU 闂锛氬す MSS + 璺緞 MTU 鎺㈡祴锛堝叕缃戝彲鐢ㄧ巼 48% -> 100%锛?- 澶嶇敤 HTTP 杩炴帴锛堝厤鎺夋瘡娆℃柊寤?TLS 鐨?30% 鎻℃墜澶辫触锛?- 姣忓垎閽熷洖澶存壘灞€鍩熺綉锛岃嚜鍔ㄥ垏鍥炲揩 400 鍊嶇殑璺緞 - 鐢婚潰蹇冭烦甯э細闈欐鏃剁渷娴侀噺锛屽鎴风浠嶇煡閬撴祦鏄椿鐨?- 閿佸睆鏃剁粰鍑哄彲鎿嶄綔鐨勬彁绀? 鎵嬭〃绔?- 鍐呯疆 GTS Root R4 / GlobalSign Root CA锛屼慨 SSLHandshakeException - 杩炴帴閿欒缈昏瘧鎴愪汉璇濓紙璇佷功/鏃堕棿/瑙ｆ瀽/瓒呮椂鍒嗗埆鎻愮ず锛?- 缁忎腑杞繛涓婂悗鐢ㄦ湇鍔″櫒鎶ョ殑鍦板潃鍒锋柊宸查厤瀵硅褰?- 鏂板灞€鍩熺綉杩炴帴椤甸潰銆佹湇鍔″櫒寤惰繜妫€娴? 鏈嶅姟鍣ㄧ - 鏀寔 chunked 璇锋眰浣擄紙淇瘡 16 绉掍竴娆＄殑杩炴帴閿欎贡涓庡ぇ闈㈢Н 502锛?- 缃戠粶璋冧紭鑴氭湰 net-tune.sh锛堝紑鏈鸿嚜鍔ㄥ簲鐢級 - 绠＄悊椤碉細鎵归噺鍒犻櫎銆佺綉缁滀綋妫€銆佷笅杞藉尯 - 闅ч亾鏀?HTTP/2 + 鍙岃繛鎺? 鏂囨。 - 璁稿彲鍗忚 / 瀹夎鍓嶅繀璇?/ 瀹夎鍚庨』鐭ワ紙浣滆€咃細灏忛害瀛愶級
55 lines
2.2 KiB
Bash
55 lines
2.2 KiB
Bash
#!/bin/bash
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# 深挖 api.cloudflare.com 为什么连不上 —— 下载登录证书必须走它。
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set -u
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echo "===== 1. DNS：分别看 A 和 AAAA ====="
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for tool in "dig +short A" "dig +short AAAA" "nslookup -type=A"; do
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echo " --- $tool ---"
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timeout 8 $tool api.cloudflare.com 2>/dev/null | head -6 | sed 's/^/ /'
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done
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echo
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echo " 系统解析器（getent）："
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getent ahostsv4 api.cloudflare.com | head -3 | sed 's/^/ v4: /'
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getent ahostsv6 api.cloudflare.com | head -3 | sed 's/^/ v6: /'
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echo
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echo "===== 2. 强制 IPv4 详细过程 ====="
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timeout 15 curl -4 -v -o /dev/null https://api.cloudflare.com/client/v4/user 2>&1 \
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| grep -E 'Trying|Connected|error|refused|timed|SSL|HTTP/' | head -10 | sed 's/^/ /'
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echo
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echo "===== 3. 换一个 Cloudflare 域名对比 ====="
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for host in api.cloudflare.com www.cloudflare.com cloudflare.com dash.cloudflare.com; do
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OUT=$(timeout 10 curl -4 -s -o /dev/null -w '%{http_code} %{time_total}s' "https://$host" 2>/dev/null)
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printf " %-26s %s\n" "$host" "${OUT:-超时}"
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done
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echo
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echo "===== 4. 用指定 IP 直连（绕过 DNS）====="
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# api.cloudflare.com 的 IPv4 通常是 104.16.x.x / 104.17.x.x
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for ip in 104.16.132.229 104.16.133.229 104.17.0.1; do
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OUT=$(timeout 10 curl -4 -s -o /dev/null -w '%{http_code} %{time_total}s' \
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--resolve "api.cloudflare.com:443:$ip" \
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https://api.cloudflare.com/client/v4/user 2>/dev/null)
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printf " 经 %-16s -> %s\n" "$ip" "${OUT:-超时}"
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done
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echo
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echo "===== 5. 走 Tunnel 那条路（它一直通）====="
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OUT=$(timeout 10 curl -4 -s -o /dev/null -w '%{http_code} %{time_total}s' \
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https://region1.v2.argotunnel.com 2>/dev/null)
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echo " region1.v2.argotunnel.com -> ${OUT:-超时}"
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echo
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echo "===== 6. 结论 ====="
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CODE=$(timeout 10 curl -4 -s -o /dev/null -w '%{http_code}' https://api.cloudflare.com/client/v4/user 2>/dev/null)
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if [ "$CODE" = "200" ]; then
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echo " api.cloudflare.com 通 —— 证书应该能下下来"
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else
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echo " api.cloudflare.com 不通（HTTP ${CODE:-000}）"
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echo " 这就是 cloudflared 报 Failed to fetch resource 的原因。"
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echo
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echo " 绕过办法：授权后让浏览器下载 cert.pem，"
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echo " 再手动放到 /root/.cloudflared/cert.pem"
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fi
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