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I have 2 servers that both run curl 7.29.0 and CentOS 7. However, when I run the following command I get 2 different results:

curl https://tlstest.paypal.com
  1. PayPal_Connection_OK
  2. ERROR! Connection is using TLS version lesser than 1.2. Please use TLS1.2

Why does one server default to a TLSv1.2 connection and the other does not?

(I know I can force it with --tlsv1.2 if I wanted to)

  • It might be a difference in patchlevel - Just checking the version a program reports is not sufficient to determine it's patchlevel, check with for instance rpm -qi curl for differences in the Release – HBruijn Jun 6 '18 at 10:50
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    Ok, so I see that the values for release do vary. Would it be safe to assume this is the reason behind the 2 results? – Craig Jun 6 '18 at 10:52
  • That would be a likely cause. - rpm -qa --last | less will show the most recent packages that were installed and unless you regularly install additional new software, that is a good indication if a system gets security (regular) updates or not – HBruijn Jun 6 '18 at 10:57
  • Thank you @HBruijn, I appreciate your time and assistance. – Craig Jun 6 '18 at 10:58
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The following steps resolved my problem:

  1. Update the following 3 packages:

sudo yum update curl libcurl nss

  1. Restart nginx/apache*

sudo service nginx restart

sudo service hhvm restart

*Replace these with relevant services (e.g. apache, php-fpm, etc...)

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