Ports

✳️ Ports :

Ports are a kind of subaddress. The IP address is the primary address and the port is the subaddress. Think of the IP address as the street address of a building and then the port as the apartment number. I need the street address to get to the right building, but I need the apartment address to find who I am looking for. This is the same with ports. The IP address gets us to right machine, but the port takes us to correct service, say HTTP on port 80.

💠 There are 65,536 ports. The first 1,024 are generally referred to as the common ports. People obviously don't remember all 65,536 ports (unless they are savant), or even the 1,024 most common ports. As a hacker, there are a few ports that you should know by heart:

🔹 20 FTP

🔹 21 FTP

🔹 22 SSH

🔹 23 Telnet

🔹 25 SMTP

🔹 53 DNS

🔹 69 TFTP

🔹 80 HTTP

🔹 443 HTTPS or HTTP over SSL

🔹 3389 RDP

I will cover subnetting, IPv6, TCP/IP, and more on our channel soon..

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