=== 400 의 본문과 머리 ===
HTTP/2 400 
server: nginx/1.22.1
date: Thu, 17 Sep 2026 07:47:28 GMT
content-type: text/plain; charset=utf-8

400 Bad Request: malformed Host header
=== TLS 협상 자체는 되나 ===
http_version=2 ssl_verify=0 code=400
--- HTTP/1.1 로 강제하면
code=400

=== 엣지 로그 ===
192.168.122.1 - - [17/Sep/2026:07:47:28 +0000] "GET /realms/master HTTP/2.0" 400 38 "-" "curl/8.5.0"
192.168.122.1 - - [17/Sep/2026:07:47:28 +0000] "GET /realms/master HTTP/2.0" 400 38 "-" "curl/8.5.0"
192.168.122.1 - - [17/Sep/2026:07:47:28 +0000] "GET /realms/master HTTP/1.1" 400 49 "-" "curl/8.5.0"
---
2026/09/17 04:27:39 [notice] 1065#1065: using inherited sockets from "5;6;"
2026/09/17 05:39:03 [error] 1106#1106: *31 connect() failed (113: No route to host) while connecting to upstream, client: 192.168.122.1, server: _, request: "GET /realms/master HTTP/1.1", upstream: "http://192.168.122.12:80/realms/master", host: "auth.hyeonworks.com"
2026/09/17 05:40:37 [error] 1106#1106: *38 connect() failed (113: No route to host) while connecting to upstream, client: 192.168.122.1, server: _, request: "GET /realms/master HTTP/1.1", upstream: "http://192.168.122.12:80/realms/master", host: "auth.hyeonworks.com"
2026/09/17 05:46:21 [error] 1106#1106: *47 connect() failed (111: Connection refused) while connecting to upstream, client: 192.168.122.1, server: _, request: "GET /realms/master HTTP/1.1", upstream: "http://192.168.122.12:80/realms/master", host: "auth.hyeonworks.com"
2026/09/17 05:48:45 [error] 1106#1106: *54 connect() failed (111: Connection refused) while connecting to upstream, client: 192.168.122.1, server: _, request: "GET /realms/master HTTP/1.1", upstream: "http://192.168.122.12:80/realms/master", host: "auth.hyeonworks.com"
