TLS 1.3 Support – How to Check if Remote Server Supports TLS 1.3

centos7ssl

I am using CentOS 7.
I want to check whether remote web server supports TLS1.3 or not.

I have tried through nmap but till date, nmap (version 7.80) doesn’t supports TLS1.3

Is there an easy way to check for that?

Best Answer

I am pretty sure openssl (you need at least version 1.1.1) is able to do this.

openssl s_client -connect www.example.com:443 -tls1_3

See https://raymii.org/s/tutorials/OpenSSL_test_TLSv1.3_connection_with_s_client.html as well.

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Apache SSL – Is It Bad to Redirect HTTP to HTTPS?

The [R] flag on its own is a 302 redirection (Moved Temporarily). If you really want people using the HTTPS version of your site (hint: you do), then you should be using [R=301] for a permanent redirect:

RewriteEngine on
RewriteCond %{SERVER_PORT} !^443$
RewriteRule ^/(.*) https://%{HTTP_HOST}/$1 [NC,R=301,L]

A 301 keeps all your google-fu and hard-earned pageranks intact. Make sure mod_rewrite is enabled:

a2enmod rewrite

To answer your exact question:

Is it bad to redirect http to https?

Hell no. It's very good.

Disable TLS 1.0 – How to Disable TLS 1.0 Without Breaking RDP

Microsoft released the patch for this problem Sep 15, 2015

See https://support.microsoft.com/en-us/kb/3080079

Best Answer

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Apache SSL – Is It Bad to Redirect HTTP to HTTPS?

Disable TLS 1.0 – How to Disable TLS 1.0 Without Breaking RDP

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