443/tcp
TLS
first 2026-09-23 · last 2026-09-23
- TLS
- TLSv1.2
- Certificate for
- api.firmware.9451.com.cn, www.api.firmware.9451.com.cn
- Issued by
- Encryption Everywhere DV TLS CA - G2
- Valid
- 2026-07-07 → 2026-10-04
Raw response
HTTP/1.1 400 Bad Request Server: nginx/1.8.0 Date: Wed, 23 Sep 2026 14:25:47 GMT Content-Type: text/html; charset=utf-8 Content-Length: 672 Connection: close <html> <head><title>400 The plain HTTP request was sent to HTTPS port</title></head> <body bgcolor="white"> <center><h1>400 Bad Request</h1></center> <center>The plain HTTP request was sent to HTTPS port</center> <hr><center>nginx/1.8.0</center> </body> </html> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page --> <!-- a padding to disable MSIE and Chrome friendly error page -->