#SysAdmin - Asegurar nuestro server web nginx+let's encrypt+securityheaders

apt-get install git
git clone https://github.com/letsencrypt/letsencrypt /opt/letsencrypt
cd /opt/letsencrypt

cd /opt/letsencrypt
./letsencrypt-auto certonly --standalone -d dominio.co.cu -d www.dominio.co.cu -d correo.dominio.co.cu

crontab -e 
30 2 * * 1 /opt/letsencrypt/letsencrypt-auto renew >> /var/log/le-renew.log

nano /etc/dovecot/dovecot.conf
  ssl_cert = </etc/letsencrypt/live/dominio.co.cu/fullchain.pem
  ssl_key = </etc/letsencrypt/live/dominio.co.cu/privkey.pem
service dovecot restart
#Postfix
<pre>postconf -e smtpd_tls_cert_file='/etc/letsencrypt/live/dominio.co.cu/cert.pem'
postconf -e smtpd_tls_key_file='/etc/letsencrypt/live/dominio.co.cu/privkey.pem'
postconf -e smtpd_tls_CAfile='/etc/letsencrypt/live/dominio.co.cu/chain.pem'
/etc/init.d/postfix restart

server {
 listen 80;
 server_name www.empresa.co.cu;
 return 301 https://$host$request_uri;
}

server {
listen 443 ssl;
 server_name www.empresa.co.cu;
 resolver 200.55.128.3 200.55.128.4 valid=300s;
 resolver_timeout 5s;
 ssl_certificate           /etc/letsencrypt/live/empresa.co.cu/fullchain.pem;
 ssl_certificate_key       /etc/letsencrypt/live/empresa.co.cu/privkey.pem;
 ssl_trusted_certificate   /etc/letsencrypt/live/empresa.co.cu/chain.pem;
        ssl on;
        ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
        ssl_prefer_server_ciphers on;
        ssl_dhparam /etc/ssl/certs/empresa.co.cu.pem;
        ssl_ciphers "EECDH+AESGCM:EDH+AESGCM:ECDHE-RSA-AES128-GCM-SHA256:AES256+EECDH:DHE-RSA-AES128-GCM-SHA256:AES256+EDH:ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA256:ECDHE-RSA-AES256-SHA:ECDHE-RSA-AES128-SHA:DHE-RSA-AES256-SHA256:DHE-RSA-AES128-SHA256:DHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA:ECDHE-RSA-DES-CBC3-SHA:EDH-RSA-DES-CBC3-SHA:AES256-GCM-SHA384:AES128-GCM-SHA256:AES256-SHA256:AES128-SHA256:AES256-SHA:AES128-SHA:DES-CBC3-SHA:HIGH:!aNULL:!eNULL:!EXPORT:!DES:!MD5:!PSK:!RC4";
        ssl_session_timeout 1440m;
        ssl_session_cache builtin:1000 shared:SSL:10m;
        ssl_stapling on;
        ssl_stapling_verify on;
        spdy_headers_comp 0;
        more_clear_headers 'Server:*';
        add_header Strict-Transport-Security "max-age=15768000; includeSubdomains";
        add_header X-Xss-Protection "1; mode=block";
        add_header X-Frame-Options "DENY";
        add_header X-Frame-Options "SAMEORIGIN";
        add_header X-Content-Type-Options "nosniff";
        add_header X-Permitted-Cross-Domain-Policies "master-only";
        add_header Cache-Control "public";
        add_header Public-Key-Pins 'pin-sha256="94h51gJiEKZVEwaG4r2YHLAOQGepNRzE/PYytHrBr/A="; pin-sha256="YLh1dUR9y6Kja30RrAn7JKnbQG/uEtLMkBgFF2Fuihg="; max-age=2592000';
        add_header Content-Security-Policy "default-src 'self'; script-src 'self' 'unsafe-inline' 'unsafe-eval'; img-src 'self'; style-src 'self' data: 'unsafe-inline'; font-src 'self'; child-src 'self'; object-src 'self'; connect-src 'self'";
 index index.html index.htm index.php;
 access_log            /var/log/nginx/access.log;
location / {
  proxy_set_header        Host $host;
  proxy_set_header        X-Real-IP $remote_addr;
  proxy_set_header        X-Forwarded-For $proxy_add_x_forwarded_for;
  proxy_set_header        X-Forwarded-Proto $scheme;
  proxy_pass          http://172.32.1.101;
  proxy_read_timeout  90;
  proxy_redirect      http://172.32.1.101 https://www.empresa.co.cu;
 }

if ($request_method !~ ^(GET|HEAD|POST)$ ) {

                 return 444;

                 }
location ~ /.well-known {
                allow all;
}
}