IIS 5 & IIS 6
SSL Client hello reset
Last post Jul 01, 2019 03:53 PM by Rovastar
Jun 27, 2019 07:52 AM|sarafidis|LINK
i have an IoT device posting data to a web app hosted to IIS 6.2.
Posting with http is working perfectly. When i change it to https i am getting handshake error.
Here is the wireshark communication
and here are the SSL protocols available on server
i am also attaching a report from ssllabs
Thanks in advance.
Jun 27, 2019 06:26 PM|lextm|LINK
You posted significantly more information in your Stack Overflow question, so don't expect someone here can guess that out.
Jul 01, 2019 07:12 AM|sarafidis|LINK
Thank you for your research.
Was this significant more information capable to find a solution that might help me?
Jul 01, 2019 03:53 PM|Rovastar|LINK
I suspect it is your IOT device that doesn't like something with your valid setup.
But I suspect you knew that already.
It is possible that there are clues in the Windows Event log under security.
Log everything with the reg setting there might help. Hopefully something
will be there. The internal error number should tell you more. Alarm bell ring out if it connects - at best! (How old is this device!!) - with RC4 and over TLS 1.2?! Maybe try running over TLS 1.0 to see if it works you might get more clues about what works
and what is not.
And what does SSLtest say for your IOT device client test
compare the server and client results.
It could be the IOT device cannot read the cert correctly or has something incompatible.