How to Check if a Port is Open (with the telnet command)

Learn how to test if a port is open or not with the telnet command. This works on Windows, Mac, and Linux. Demonstration will include the http, https, ssh, and ftp ports as well as using canyouseeme.org to check port forwarding.
Find more at tonyteaches.tech
Check out my vlog channel ‪@TonyFlorida‬
#telnet #openport

[@joeweyquetzal5582]

Wow this was the easiest and the best training video I’ve seen on using telnet… thank you!

[@TonyTeachesTech]

Glad it was helpful!

[@idancohen9690]

Thank you.

[@tahersadeghi6773]

Good Lad Tony.

[@xenomorph3161]

im 34, doing a career change from nursing to IT, this is good stuff to know, good work lol

[@TonyTeachesTech]

Great to hear, good luck!

[@viwelolwane]

don't. IT is dead end after 40

[@angeloreyes707]

Music at the end was awesome

[@TonyTeachesTech]

Thanks!

[@khutsomosomane9365]

Very helpful

[@TonyTeachesTech]

Thanks

[@apoorvabhandari4245]

Amazing 👏

[@TonyTeachesTech]

Thank you! Cheers!

[@hijmtlc3191]

Hi i make a small website for my business when i check the port 8080 have i found it open, is it dangerous? how can i close it? Please help me

[@johnbosire5675]

hello Tony how can i change serial number of a router gpon

[@carlososa773]

Firewall off port 502 not talking. No AV. Any ideas?

[@TonyTeachesTech]

Not sure

[@pete3816]

Nmap???

[@TrevorHawes]

Please add what to do if it says zsh: command not found: telnet

[@intense0excellent]

Install telnet

[@intense0excellent]

sudo apt-get install telnetd

[@j.d.3269]

TCP or UDP, does it matter?

[@TonyTeachesTech]

Most likely TCP

[@j.d.3269]

@@TonyTeachesTech Yeah, most likely TCP, which reminded me that UDP is connectionless, thank you for your answer.

[@nidarshabandara8035]

my isp wanna only give private ip for money, or otherwise i will be behind stupid cgnat. is there free way to get rid of this cgnat. its nightmare.

[@TonyTeachesTech]

Not that I know of

[@gangster9947]

3:58
Why do you show IP. Are you not afraid that you can be DDoSd

[@TonyTeachesTech]

It's okay for me, I am moving out soon

[@angeloreyes707]

this isn't working on mine );

[@TonyTeachesTech]

Boo

[@joesalgadSF415]

Imagine you finding an open port for google by just putting random numbers

[@TonyTeachesTech]

Probably haha

[@heeya937]

?

[@TonyTeachesTech]

¯\_(ツ)_/¯