![]() This guide will study various methods of analysing a port on a Linux Ubuntu 20.04 system. In computer networks, knowledge of port management is a very vital task for administering server security. To harden the security of system/servers, system administrators usually secure these ports by either denying access to them by unknown users/services or changing the default port number to some other value. Many important applications like database servers, web servers, file transfer services, etc., use dedicated ports. If a hacker manages to find such a port, he/she can use it to send illegitimate traffic or use it for gaining unauthorized access on remote servers. ![]() ![]() Hackers usually target compromised servers by analysing critical open ports. Monitoring for an open port is a key security measure for securing a remote server.
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