How to solve the problem that the linux port is not working?

In this article, we will learn how to solve the problem of linux port failure. There is a certain reference value, friends in need can refer to, hope to help you.

Introduction to Port availability probe tool

Different operating systems use different tools for port availability detection.

Introduction of Port availability Detection tools in Linux Environment

Traceroute is a network testing tool pre-installed with almost all Linux distributions to track the path that Internet Protocol (IP) packets take when they are delivered to the destination address. You can probe port availability through the traceroute tool.

Traceroute detects the connectivity of the corresponding port on the entire link from the packet source to the destination server by sending TCP packets to the destination port.

Common uses of traceroute port availability probe are as follows:

Traceroute [- n]-T-p Host

Example:

Parameter description:

-n directly use the IP address instead of the host name (disable DNS backchecking).

-T is detected by TCP.

-p probes the destination port number.

Host target server domain name or IP.

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