Install SSL Letsencrypt not working

[maytinhahihi]

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My domain is:

Sửa máy tính tại nhà Hà Nội chất lượng nhất

I ran this command:
git clone https://github.com/letsencrypt/letsencrypt /opt/le
cd /opt/le
/opt/le/letsencrypt-auto certonly --standalone -d suamaytinhahihi.com
It produced this output:
suamaytinhahihi.com refused to connect.
My web server is (include version):
vesta cp: nginx, apache
The operating system my web server runs on is (include version):
ubuntu 14.04
My hosting provider, if applicable, is:
vps amazon
I can login to a root shell on my machine (yes or no, or I don’t know):
yes
I’m using a control panel to manage my site (no, or provide the name and version of the control panel): vesta cp

i check ssl on digicert : unable connect

[jared.m]

Are you sure your server is accessible from the internet? No firewalls or routing issues blocking access?

[schoen]

It looks to me like the DNS record for suamaytinhahihi.com and www.suamaytinhahihi.com is currently completely missing. There needs to be a record in DNS to let people find the IP address of your server.

I’m seeing that your DNS servers are ns1.matbao.com and ns2.matbao.com, but that they currently aren’t serving A records for your domain name.

[maytinhahihi]

thank you, i had fix.