https://certbot.eff.org/#debianstretch-nginx

certbot certonly

certbot certonly --standalone -d example.com -d www.example.com

certbot renew

https://docs.microsoft.com/en-us/ef/core/providers/mysql/
http://insidemysql.com/howto-starting-with-mysql-ef-core-provider-and-co...

https://docs.microsoft.com/en-us/ef/core/providers/pomelo/

https://docs.microsoft.com/en-us/aspnet/core/data/ef-mvc/intro

Updating Diffie-Hellman Parameters

If you test your server using the SSL Labs Server Test now, it will only get a B grade due to weak Diffie-Hellman parameters. This effects the security of the initial key exchange between our server and its users. We can fix this by creating a new dhparam.pem file and adding it to our server block.

Create the file using openssl:

sudo openssl dhparam -out /etc/ssl/certs/dhparam.pem 2048

systemctl start kestrel-hellomvc.service
systemctl stop kestrel-hellomvc.service
systemctl status kestrel-hellomvc.service

journalctl -fu kestrel-hellomvc.service

https://www.namecheap.com/support/knowledgebase/article.aspx/9419/0/nginx

cat certificate.crt ca_bundle.crt >> cert_chain.crt

ssl_certificate_key /etc/ssl/free/private.key;
ssl_certificate     /etc/ssl/free/cert_chain.crt;
 
ssl_protocols TLSv1.1 TLSv1.2;
ssl_prefer_server_ciphers on;
ssl_ciphers ECDH+AESGCM:DH+AESGCM:ECDH+AES256:DH+AES256:ECDH+AES128:DH+AES:ECDH+3DES:DH+3DES:RSA+AESGCM:RSA+AES:RSA+3DES:!aNULL:!MD5:!DSS;
 
ssl_dhparam /etc/nginx/ssl/dhparam.pem;

https://cryptoreport.websecurity.symantec.com/checker/

https://www.ssllabs.com/ssltest/analyze.html?d=dev.typesoft.pl

netstat -nlp

https://www.gigaone.pl/wsparcie-techniczne/instalacja-certyfikatu-ssl/nginx

https://webinsider.pl/linux-firewall-ufw/

https://docs.microsoft.com/en-us/aspnet/core/publishing/linuxproduction?...