Netowkr Security

Question 1

Best practices to secure a network connection

Answer 1

Reduce number of services provided by a single host
Implement a local firewall (firewalld)
Only open necessary ports in the firewall
Use encryption for data transfer
Implement a centralized authentication service(kerberos)
Implement an intrustion prevention system IPS
Implement a virtual private network VPN
Transport Layer Security TLS when possible or Secure Socket layer

Question 2

Network security tools

Answer 2

Interact with the firewall - firewal-cmd (red Hat) and ufw (Debian/Ubuntu)
Interact with services- systemctl
View sockets processes and open files - ss, ps, and lsof
Data transfer and commujnication - scp, ssh, rsync. sftp
investigate and analysis -wireshark, nmap, traceroute etc