PPTP

PPTP:
  Firmware: 1
  Hostname: yyyip.cn
  Vendor: yyyip.cn

HTTP/1.1 503 Service Unavailable
Content-Type: text/html; charset=us-ascii
Server: Microsoft-HTTPAPI/2.0
Date: Fri, 19 Apr 2024 19:02:11 GMT
Connection: close
Content-Length: 326

HTTP/1.1 400 Bad Request
Server: squid/3.5.12
Mime-Version: 1.0
Date: Tue, 07 May 2024 14:22:31 GMT
Content-Type: text/html;charset=utf-8
Content-Length: 3536
X-Squid-Error: ERR_INVALID_URL 0
Vary: Accept-Language
Content-Language: en
X-Cache: MISS from IPRENT.CN
X-Cache-Lookup: NONE from IPRENT.CN:6666
Via: 1.1 IPRENT.CN (squid/3.5.12)
Connection: close