What is an SMB Port? What is Port 445 and Port 139 used for?

NetBIOS stands for Network Basic Input Output System. It is a software protocol that allows applications, PCs, and Desktops on a local area network (LAN) to communicate with network hardware and to transmit data across the network. Software applications that run on a NetBIOS network locate and identify each other via their NetBIOS names. A NetBIOS name is up to 16 characters long and usually, separate from the computer name. Two applications start a NetBIOS session when one (the client) sends a command to “call” another client (the server) over TCP Port 139.

While Port 139 is known technically as ‘NBT over IP’, Port 445 is ‘SMB over IP’. SMB stands for ‘Server Message Blocks’. Server Message Block in modern language is also known as Common Internet File System. The system operates as an application-layer network protocol primarily used for offering shared access to files, printers, serial ports, and other sorts of communications between nodes on a network.

[orangeblock]

Any particular reason why that damn music is serving as a DISTRACTION in the background??

[dhanarajdavid]

We've opened this port to share the file from one server to another periodically. Do you have any alternate ways without affecting the security vulnerabilities?

[lazyto]

Remove the sound, it’s so distracting

[angeloreyes]

Your videos are great but for the love of dog please turn down the insanely loud sharp piercing music at the beginning and don't use something as nerve wracking as EDM in a video I'm watching during relaxing time watching videos to study at 10AM. Your videos are awesome 9/10 with the music.

[artisty]

The backgroud music gives me feeling like I am sitting in a Cathedral :D :D...

[Oxe...hajapaciencia]

Hello. Thansk for the video! My nmap just showed all these and some other open ports! 445 -135-139 (TCP) / 53 (UDP) and my avast already gave a few warnings that this IP trying to exploit the machine (but that's the IP the machine connects to on the router!), and I tried avast, bitdefender, malwarebytes, spybot and now surfshark, and they all return false negatives! The machine continues to have escalated access and blocking me root/admin access in many ways. Any idea how to fix it, plesae? It's a windows 11 on a lenovo device. Thank you

[realscreen]

How do you open these ports only for private networks

[lightskinlegend]

thank you, I im one step closer to hacking my box now :)

[webdesignsbytom]

why the terrible music when you are talking?

[CésarMarcelino-ky]

you should at least let us know more info about the background music lol

[rwhite]

music makes the video borderline unwatchable

[TuneInTurnOnDropOutt]

THE MUSIC IS A DISTRACTION. You ruined a good lesson - please remove the music.