500 Syntax error, command unrecognized

Hikvision IP Camera

<empty title>

HTTP/1.1 200 OK
Date: Thu, 27 Feb 2025 16:04:44 GMT
Server: Webs
X-Frame-Options: SAMEORIGIN
X-Content-Type-Options: nosniff
X-XSS-Protection: 1;mode=block
ETag: "0-a12-1e1"
Content-Length: 481
Content-Type: text/html
Connection: keep-alive
Keep-Alive: timeout=60, max=99
Last-Modified: Thu, 29 Oct 2020 05:51:54 GMT


Hikvision IP Camera:
  Web Version: 4.0.1 build 201029
  Plugin Version: 3.0.7.38
  ActiveX Files:
    AudioIntercom.dll: 1.4.0.9
    localServiceControl: 1.0.0.11
    NetStream.dll: 1.0.5.65
    npWebVideoPlugin.dll: 3.0.7.38
    PlayCtrl.dll: 7.3.9.46
    StreamTransClient.dll: 1.1.3.17
    SystemTransform.dll: 2.5.4.12
    WebVideoActiveX.ocx: 3.0.7.38

RTSP/1.0 401 Unauthorized
CSeq: 1
WWW-Authenticate: Digest realm="2407ec43d80adca46e8eae51", nonce="176d9b2b6", algorithm="MD5"