We know that in today’s world protecting your system is a must. However, there are number of ways to protect and remove malware but no one ensures your system is secure, there always loophole for hackers in any terms. So we can use different layers of protection to minimize the risk of hacking. (1). listen_addresses: Informs PostgreSQL which IP addresses to listen on. This usually defaults to localhost or local, but many people change it to *, meaning all available IP addresses. It is a good practice to allow connections only from the known ips or your network, and avoid general values like listen_address = “*” or “0.0.0.0:0” or “::” , which will tell PostgreSQL to accept connection from any IP. (2). Port: Change the default port 5432 by modifying the value of the port parameter within postgresql.conf file. (3). pg_hba.conf : This file controls: which hosts are allowed to connect, how clients are authenticated, which PostgreSQL user names they can use, which...