ykxmz 1.5.0锛氫慨澶嶆墜琛ㄧ TLS 璇佷功鏍￠獙 + MTU 淇缃戠粶绋冲畾鎬?

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
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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
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- 闅ч亾鏀?HTTP/2 + 鍙岃繛鎺?
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- 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

_build/dig_cf_api.sh

@@ -0,0 +1,54 @@
+#!/bin/bash
+# 深挖 api.cloudflare.com 为什么连不上 —— 下载登录证书必须走它。
+set -u
+
+echo "===== 1. DNS：分别看 A 和 AAAA ====="
+for tool in "dig +short A" "dig +short AAAA" "nslookup -type=A"; do
+    echo "  --- $tool ---"
+    timeout 8 $tool api.cloudflare.com 2>/dev/null | head -6 | sed 's/^/    /'
+done
+echo
+echo "  系统解析器（getent）："
+getent ahostsv4 api.cloudflare.com | head -3 | sed 's/^/    v4: /'
+getent ahostsv6 api.cloudflare.com | head -3 | sed 's/^/    v6: /'
+
+echo
+echo "===== 2. 强制 IPv4 详细过程 ====="
+timeout 15 curl -4 -v -o /dev/null https://api.cloudflare.com/client/v4/user 2>&1 \
+    | grep -E 'Trying|Connected|error|refused|timed|SSL|HTTP/' | head -10 | sed 's/^/  /'
+
+echo
+echo "===== 3. 换一个 Cloudflare 域名对比 ====="
+for host in api.cloudflare.com www.cloudflare.com cloudflare.com dash.cloudflare.com; do
+    OUT=$(timeout 10 curl -4 -s -o /dev/null -w '%{http_code} %{time_total}s' "https://$host" 2>/dev/null)
+    printf "  %-26s %s\n" "$host" "${OUT:-超时}"
+done
+
+echo
+echo "===== 4. 用指定 IP 直连（绕过 DNS）====="
+# api.cloudflare.com 的 IPv4 通常是 104.16.x.x / 104.17.x.x
+for ip in 104.16.132.229 104.16.133.229 104.17.0.1; do
+    OUT=$(timeout 10 curl -4 -s -o /dev/null -w '%{http_code} %{time_total}s' \
+          --resolve "api.cloudflare.com:443:$ip" \
+          https://api.cloudflare.com/client/v4/user 2>/dev/null)
+    printf "  经 %-16s -> %s\n" "$ip" "${OUT:-超时}"
+done
+
+echo
+echo "===== 5. 走 Tunnel 那条路（它一直通）====="
+OUT=$(timeout 10 curl -4 -s -o /dev/null -w '%{http_code} %{time_total}s' \
+      https://region1.v2.argotunnel.com 2>/dev/null)
+echo "  region1.v2.argotunnel.com -> ${OUT:-超时}"
+
+echo
+echo "===== 6. 结论 ====="
+CODE=$(timeout 10 curl -4 -s -o /dev/null -w '%{http_code}' https://api.cloudflare.com/client/v4/user 2>/dev/null)
+if [ "$CODE" = "200" ]; then
+    echo "  api.cloudflare.com 通 —— 证书应该能下下来"
+else
+    echo "  api.cloudflare.com 不通（HTTP ${CODE:-000}）"
+    echo "  这就是 cloudflared 报 Failed to fetch resource 的原因。"
+    echo
+    echo "  绕过办法：授权后让浏览器下载 cert.pem，"
+    echo "  再手动放到 /root/.cloudflared/cert.pem"
+fi