How to use telnet to test connectivity to TCP ports
![](https://netbeez.net/wp-content/uploads/2018/06/Telnet_blog_tcp.jpg)
Although telnet has become obsolete for remote administration purposes, this application is still widely used to verify connectivity to remote services that are based on TCP and can be used to monitor firewalls. Learn more about using telnet to test connectivity in this post!
How to use telnet to test connectivity to TCP ports
![](https://www.cisco.com/c/dam/en/us/support/docs/optical-networking/ons-15454-sdh-multiservice-provisioning-platform-mspp/66069-ene-gne-putty-06.gif)
Use PuTTY to Establish a Telnet Connection to ENE Through GNE - Cisco
Andreas Efthymiou on LinkedIn: How to use telnet to test connectivity to TCP ports
![](https://i.ytimg.com/vi/jA66Jx4bzYU/maxresdefault.jpg)
Testing port connectivity with Telnet
![](https://miro.medium.com/v2/resize:fit:706/1*B2naeVP6xmnJUpgA8eFybg.png)
Net Sec Challenge — TryHackMe. Use this challenge to test your
![](https://linuxiac.b-cdn.net/wp-content/uploads/2021/07/telnet-to-a-port.png)
Telnet to a Port to Test Network Connectivity
![](https://i.pinimg.com/originals/52/52/35/525235600339fe34ee9b0a9f84dd457b.jpg)
internet download manager 6.15 build 7 final multilingual patch
![](https://i.stack.imgur.com/OZtqI.png)
networking - Port forwarding not working, tried with telnet
Bill Watts - Engineering Manager - NetBeez, Inc.
![](https://i.stack.imgur.com/TlTVP.png)
How to check Port 1433 is working for Sql Server or not? - Stack
![](https://www.omnisecu.com/images/tcpip/telnet-output-port-is-open.jpg?ezimgfmt=ngcb3/notWebP)
How to test ports using TELNET
What are the alternatives for checking open ports, besides telnet
![](https://staticfiles.acronis.com/images/content/d03afb3589999bd5d35492e023f28f8e.png)
Using telnet to Test Open Ports - Definition, Importance, Use
![](https://cyberpanel.net/wp-content/uploads/2022/04/Test-SMTP-Connection-Using-A-Manual-Telnet-Session.png)
Test SMTP Connection Using A Manual Telnet Session