Your computer has a port number, and you should know what it is. Why? Because if you ever need to use it for troubleshooting or security purposes, you’ll need to know where to find it. In this blog post, we’ll show you how to locate your computer’s port number on both Windows and macOS platforms. So whether you’re a new user or just want a refresher on the topic, read on for all the info you need.
Your port number is the number that identifies the communication port that your computer uses to connect to the internet. It is generally a four-digit number, and you can usually find it in your computer’s settings. If you’re not sure what your port number is, you can always contact your internet service provider and they’ll be able to tell you.
The port number is the specific number that identifies a particular network service on a computer. Port numbers are assigned to each end of a connection so that incoming and outgoing data can be properly routed. By default, most computers have their port numbers set to well-known values so that common services can be easily accessed. However, you can change your port numbers if needed.
Port numbers are used by transport protocols like TCP and UDP to route messages to the proper application or service on a host. For example, when you type “http://example.com” into your web browser, your computer is actually sending a request to the server at example.com on port 80 (the default HTTP port). The server then responds by sending the requested web page back to your computer on the same port.
There are two main types of port numbers:
When configuring firewall rules or accessing services on a remote computer, you will need to know the specific port numbers that are being used. For example, if you want to allow incoming SSH connections into your server, you would need to open up port 22 (the default SSH port) on your firewall. Similarly, if you want to set up a web server that is accessible from the Internet, you would need to make sure that port 80 (the default HTTP port) is open.
You can usually find out what ports are being used by looking at the application’s documentation or by searching online.
There are two types of Internet Protocol (IP) traffic. They are:
Both TCP and UDP work at the transport layer of the IP stack, but the two have very different semantics. In this article, we will compare and contrast the two most common types of IP traffic.
Transmission Control Protocol (TCP) is a connection-oriented protocol. This means that before any data can be sent, a connection must first be established between the two hosts. The process of establishing a connection is known as the three-way handshake. Once the connection is established, data can flow freely between the two hosts. If either host wants to end the connection, they must first inform the other host. This is known as a graceful disconnect.
User Datagram Protocol (UDP) is a connectionless protocol. This means that there is no need to establish a connection before data can be sent. Data can simply be sent from one host to another without any prior communication. UDP is often referred to as the “unreliable” protocol because it does not guarantee that data will arrive at its destination. However, UDP is often used for time-sensitive applications where reliability is not as important as speed.
As a network administrator, you need to know your port number in order to troubleshoot networking issues. By knowing which port is which, you can quickly identify and fix problems. Additionally, some applications require you to enter the port number in order to access specific features. Knowing your port numbers can therefore be essential for using certain software programs. Finally, many online games use port numbers in order to connect players. If you want to play one of these games, you’ll need to know which port to use. In short, there are many reasons why you might need to know your port number. Knowing this information can help you solve problems and take advantage of all that your computer has to offer.
Sr.No Proto Local Address Foreign Address State PID
2. TCP 0.0.0.0:135 DESKTOP-3NP5VCV:0 LISTENING 976
3. TCP 0.0.0.0:445 DESKTOP-3NP5VCV:0 LISTENING 4156
4. TCP 0.0.0.0:4998 DESKTOP-3NP5VCV:0 LISTENING 2724
5. TCP 0.0.0.0:5000 DESKTOP-3NP5VCV:0 LISTENING 4308
6. TCP 0.0.0.0:5001 DESKTOP-3NP5VCV:0 LISTENING 4312
Macs come with a built-in firewall that protects your computer from outside connections. By default, the firewall is turned on and will block all incoming connections. However, you can easily configure the firewall to allow specific connections.
You can also add specific ports that you want to allow access to. To do this:
By following these steps, you can easily allow specific connections and applications through the built-in firewall.
Common port numbers are used to identify a specific process or network service. These can be used by both TCP and UDP protocols. Some common ports are as under:
The File Transfer Protocol (FTP) is a standard network protocol used for transferring files from one host to another host over a TCP-based network, such as the Internet. FTP is built on a client-server architecture and uses separate control and data connections between the client and the server.
Secure Shell (SSH) is a cryptographic network protocol for secure data communication, remote shell services or command execution, and other secure network services between two networked computers that connect, via a secure channel over an insecure network, a server and a client (running SSH server and SSH client programs, respectively).
The Telnet protocol is a text-based protocol used for remote control of devices. It uses a virtual terminal connection that allows the user to access a device as if they were physically present in front of it.
Simple Mail Transfer Protocol (SMTP) is a standard protocol for sending emails. Email clients use SMTP to send messages to a mail server for delivery. The mail server then forwards the message to the recipient’s mailbox.
Hypertext Transfer Protocol (HTTP) is an application-level protocol for distributed, collaborative, hypermedia information systems. HTTP is the foundation of data communication for the World Wide Web. Hypertext is structured text that uses logical links (hyperlinks) between nodes containing text.
The Post Office Protocol (POP) is an application-layer Internet standard protocol used by local e-mail clients to retrieve e-mail from a remote server over a TCP/IP connection. POP has been developed through several versions, with version 3 (POP3) being the most recent.
The Internet Message Access Protocol (IMAP) is a mail protocol used for accessing email on a remote web server from a local client. IMAP is an alternative to the older POP protocol. Unlike POP, which downloads messages to a local client machine, IMAP leaves messages on the server and allows the user to access them from any location.
Simple Network Management Protocol (SNMP) is a widely used protocol for monitoring the status of network equipment, such as routers, switches, servers, and printers. SNMP uses a simple set of operations called Get, Get-Next, and Set that are used to retrieve or modify the values of variables on a remote device. Moreover, these variables are organized in a hierarchical structure known as a Management Information Base (MIB).
So, the above are some of the most commonly used port numbers. There are many more in existence. however, these are typically the ones you will see most often.
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