How to install Let’s Encrypt on Tomcat port :8080 on Ubuntu 20.04

Installing Let’s Encrypt on Tomcat using port 8080 on Ubuntu 20.04 involves several steps:

First, you will need to install certbot, the Let’s Encrypt client, by running the following command:

sudo apt-get install certbot

Next, you will need to configure certbot to work with Tomcat. This can be done by creating a new file in the /etc/letsencrypt/renewal-hooks/deploy/ directory, named tomcat.sh. In this file, you will need to include a script that will tell certbot to reload the Tomcat server after it has renewed the certificate.

You will need to open your ports 80 and 443 for incoming traffic on firewall by using command :

sudo ufw allow 80/tcp
sudo ufw allow 443/tcp

Now you will need to generate the SSL certificate using certbot. You can do this by running the following command:

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

Now you will need to configure Tomcat to use the SSL certificate. You will need to update the server.xml file located in the /usr/local/tomcat/conf/ directory. You will need to add the following connectors to the file:

scheme="https" secure="true" sslProtocol="TLS" />

After updating the server.xml file, you will need to restart Tomcat for the changes to take effect.

Finally, you will need to set up a cron job to automatically renew the SSL certificate. This can be done by running the following command:

sudo crontab -e
Then by adding the following line:
0 0 1 * * /usr/bin/certbot renew --quiet --no-self-upgrade

Please note that the above steps are a general guide and may require some adjustment depending on your specific environment. Also, make sure you have your domain name pointing to your server IP.

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