eric$ openssl s_client -connect coronavirustechhandbook.com:443 -showcerts -tls1_2 -crlf

CONNECTED(00000006)

4526024300:error:14004410:SSL routines:CONNECT_CR_SRVR_HELLO:sslv3 alert handshake failure:/BuildRoot/Library/Caches/com.apple.xbs/Sources/libressl/libressl-22.260.1/libressl-2.6/ssl/ssl_pkt.c:1205:SSL alert number 40

4526024300:error:140040E5:SSL routines:CONNECT_CR_SRVR_HELLO:ssl handshake failure:/BuildRoot/Library/Caches/com.apple.xbs/Sources/libressl/libressl-22.260.1/libressl-2.6/ssl/ssl_pkt.c:585:

---

no peer certificate available

---

No client certificate CA names sent

---

SSL handshake has read 7 bytes and written 0 bytes

---

New, (NONE), Cipher is (NONE)

Secure Renegotiation IS NOT supported

Compression: NONE

Expansion: NONE

No ALPN negotiated

SSL-Session:

    Protocol  : TLSv1.2

    Cipher    : 0000

    Session-ID: 

    Session-ID-ctx: 

    Master-Key: 

    Start Time: 1584736646

    Timeout   : 7200 (sec)

    Verify return code: 0 (ok)

---

Sincerely,

Eric Tykwinski
TrueNet, Inc.
P: 610-429-8300

On Mar 20, 2020, at 4:34 PM, Alexandre Petrescu <alexandre.petrescu@gmail.com> wrote:
please stop writing me private emails, thank you, with due politeness and smiley :-)
Alex, LF/HF 2
Le 20/03/2020 à 19:40, Rob Pickering a écrit :
On Fri, 20 Mar 2020 at 18:11, Alexandre Petrescu <alexandre.petrescu@gmail.com> wrote:
CA==Certificate Authority
the browser makes me questions before allowing me to see the content, after I click the indicated URL
LF/HF
What root CA list are you using?

I'm not at all involved in their hosting, but it looks like they are sitting behind Cloudflare SSL which is trusted by the default CA list of the browser vendor on my desktop.

--
Rob Pickering, rob@pickering.org