해당 사이트에서 저희 사이트를 차단하고 있는 것으로 보입니다.
그냥 일반 개발 서버에서 테스트 하면 "http /1.1 301"의 리턴이 잘 나오고 있습니다만
실제 서비스 서버들로 요청을 하면 다음과 같이 502 에러가 뜨고 있습니다.
다음 링크의 내용 참고 바랍니다.
https://devtalk.kakao.com/t/topic/47476/5
다음은 저희가 테스트한 결과 입니다.
curl -v kurl http://www.hnhjob.com/
* Rebuilt URL to: kurl/
* Trying 10.60.254.84...
* TCP_NODELAY set
* Connected to proxy01.kakaocdn.net (10.60.254.84) port 8081 (#0)
> GET http://kurl/ HTTP/1.1
> Host: kurl
> User-Agent: curl/7.54.0
> Accept: */*
> Proxy-Connection: Keep-Alive
>
< HTTP/1.1 502 Cannot find server.
< Date: Mon, 26 Mar 2018 08:18:35 GMT
< Cache-Control: no-store
< Content-Type: text/html
< Content-Language: en
< Content-Length: 391
<
<HTML>
<HEAD>
<TITLE>Unknown Host</TITLE>
</HEAD>
<BODY BGCOLOR="white" FGCOLOR="black">
<H1>Unknown Host</H1>
<HR>
<FONT FACE="Helvetica,Arial"><B>
Description: Unable to locate the server requested ---
the server does not have a DNS entry. Perhaps there is a misspelling
in the server name, or the server no longer exists. Double-check the
name and try again.
</B></FONT>
<HR>
</BODY>
* Connection #0 to host proxy01.kakaocdn.net left intact
* Found bundle for host www.hnhjob.com: 0x7fc50bf1f8e0 [can pipeline]
* Re-using existing connection! (#0) with proxy proxy01.kakaocdn.net
* Connected to proxy01.kakaocdn.net (10.60.254.84) port 8081 (#0)
> GET http://www.hnhjob.com/ HTTP/1.1
> Host: www.hnhjob.com
> User-Agent: curl/7.54.0
> Accept: */*
> Proxy-Connection: Keep-Alive
>
< HTTP/1.1 301 Moved Permanently
< Content-Type: text/html; charset=UTF-8
< Location: https://www.hnhjob.com:2012/
< Date: Mon, 26 Mar 2018 08:16:32 GMT
< Content-Length: 209
< Age: 123
<
<head><title>문서가 이동되었습니다.</title></head>
* Connection #0 to host proxy01.kakaocdn.net left intact
<body><h1>개체가 이동되었습니다.</h1><a HREF="https://www.hnhjob.com:2012/">여기</a>에서 이 문서를 찾을 수 있습니다.</body>