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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
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鎵嬭〃绔?- 鍐呯疆 GTS Root R4 / GlobalSign Root CA锛屼慨 SSLHandshakeException
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2026-10-06 19:01:05 +08:00
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#!/bin/bash
# 修 DNS 劫持:把 api.cloudflare.com 钉到真实的 Cloudflare IP。
#
# 根因(实测出来的):
# 这条 4G 线路把 api.cloudflare.com 解析到 141.193.154.210,
# 那是个运营商拦截设备,挂自签名证书:
# * SSL certificate problem: self-signed certificate
#
# 而 cloudflared 下载登录证书必须走 api.cloudflare.com,
# 所以一直报 Failed to fetch resource。
#
# 用真实 Cloudflare IP 直连就正常(返回 403 = 正常应答,没登录而已)。
#
# 这条 hosts 记录是让具名隧道能建起来的**关键**。
set -u
HOSTS=/etc/hosts
MARK="# LanRemote: 钉住 Cloudflare API(这条线路会 DNS 劫持)"
IPS="104.16.132.229 104.16.133.229"
echo "===== 1. 修之前 ====="
getent ahostsv4 api.cloudflare.com | head -1 | sed 's/^/ /'
echo
echo "===== 2. 备份 hosts ====="
cp -n "$HOSTS" "${HOSTS}.lanremote.bak" 2>/dev/null || true
ls -la "${HOSTS}.lanremote.bak" 2>/dev/null | sed 's/^/ /'
echo
echo "===== 3. 清掉旧的同类记录 ====="
if grep -q "$MARK" "$HOSTS" 2>/dev/null; then
# 删掉标记行和它后面的 api.cloudflare.com 行
sed -i "/$MARK/d" "$HOSTS"
sed -i '/api\.cloudflare\.com/d' "$HOSTS"
echo " 已清掉旧记录"
else
echo " 没有旧记录"
fi
echo
echo "===== 4. 写入钉住的 IP ====="
{
echo ""
echo "$MARK"
for ip in $IPS; do
echo "$ip api.cloudflare.com"
done
} >> "$HOSTS"
echo " 已写入:"
tail -4 "$HOSTS" | sed 's/^/ /'
echo
echo "===== 5. 验证 ====="
getent ahostsv4 api.cloudflare.com | head -2 | sed 's/^/ /'
echo
for i in 1 2 3; do
OUT=$(timeout 12 curl -4 -s -o /dev/null -w '%{http_code} %{time_total}s' \
https://api.cloudflare.com/client/v4/user 2>/dev/null)
printf " 第 %d 次: HTTP %s\n" "$i" "${OUT:-超时}"
sleep 1
done
CODE=$(timeout 12 curl -4 -s -o /dev/null -w '%{http_code}' \
https://api.cloudflare.com/client/v4/user 2>/dev/null)
echo
if [ "$CODE" = "403" ] || [ "$CODE" = "200" ]; then
echo " ✓ api.cloudflare.com 现在通了($CODE 是正常应答,没带 Token 而已)"
echo " → cloudflared 应该能下证书了,重新走一遍 login"
else
echo " ✗ 还是不通(HTTP ${CODE:-000})"
fi