I checked this: enable ssh curl
But when I try to send the curl command: curl -T telnet_on.xml http://xx:xxxxx@xxxxx:80/ISAPI/System/Network/telnetd
It shows this error: curl: (3) URL using bad/illegal format or missing URL or if I try to put '' in the link curl: (6) Could not resolve host: 'http
Let me know what is returned. You should get something like this:
<SSHversion="1.0"xmlns="http://www.hikvision.com/ver20/XMLSchema">
<enabled>false</enabled>
</SSH>
Good question...
Sometimes the setting will stick but needs a reboot.
Firmware up-to-date?
Check under Integration Protocol, do you have a admin level account?
Strange. The 401 error might be related to the previous session and it expiring on reboot. The only other way I can think of is trying via the Hikvision SDK. You could download the SDK and compile the Remote Configuration project in Visual Studio (a chore if you don't have VS installed) or I could compile the project and post the application. Still no guarantee it will work...