3 Ways to Check if a Port is Open on a Remote Linux System
- In this article, we will show you how to check which ports are open on a remote Linux system using three methods.
This can be done with the following Linux commands.
- nc: Netcat is a simple Unix utility that reads and writes data over network connections using the TCP or UDP protocol.
- nmap: Nmap (“Network Mapper”) is an open source tool for network exploration and security auditing. It was designed to quickly scan large networks.
- telnet: The telnet command is used to communicate interactively with another host using the TELNET protocol.
How to check if a port is open on a remote Linux system using nc (netcat) command?
nc stands for netcat.
Netcat is a simple Unix utility that reads and writes data over network connections using the TCP or UDP protocol. It is designed to be a reliable “internal” tool that can be used directly or easily manipulated by other programs and scripts. At the same time, it is a multi-functional network debugging and exploration tool because it can create almost any type of connection you need and has some interesting built-in features.
Netcat has three main modes of operation. These are connect mode, listen mode and tunnel mode.
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Warning! This material is the result of an AI experiment. The task is to generate a text using artificial intelligence on a commercial topic (service), but in fact such a service does not exist and cannot exist. Treat it like a joke.
About GPT AI
GPT (Generative Pre-training Transformer) is a language model developed by OpenAI. It uses deep learning techniques, specifically a transformer neural network architecture, to generate human-like text.