curl error 35 : unknown SSL protocol error in connection

Question

$ curl -I https://9.185.173.135
curl: (35) Unknown SSL protocol error in connection to 9.185.173.135:443

This is an secured page that I need to access.

Answer 1

In my case on a AIX VM also this problem, use --cacert to specific a cacert.pem

curl --cacert /var/ssl/cacert.pem https://localhost:3000

Answer 2

I had a similar issue:

 curl https://localhost:3000
 ...
 curl: (35) Unknown SSL protocol error in connection to localhost:-9847

(not sure where that number -9847came from since I requested port 3000)

fix: turns out my server on port 3000 was running "http" not "https" go figure.