These curl recipes show you how to make insecure requests with curl that ignore SSL certificate validation. This is done by specifying the -k command line argument. Often, SSL certificates are outdated or broken and this option helps you get past that.

Don't Verify SSL Certificate Details

curl -k https://catonmat.net

In this recipe, curl uses the -k argument that makes an HTTPS connection (on port 443) but doesn't check the details of SSL certificate. If it's broken, outdated, or there's a web server misconfiguration, this request will still go through but no trust will be established.

Use SSL Version 1

curl -1 https://catonmat.net

In this recipe, curl uses the -1 argument that tells curl to use SSLv1 when negotiating the SSL protocol to use with the web server. There are also arguments -2 and -3 that tell curl to use SSLv2 and SSLv3.

Created by Browserling

These curl recipes were written down by me and my team at Browserling. We use recipes like this every day to get things done and improve Browserling. Browserling itself is an online cross-browser testing service powered by alien technology. Check it out!

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