If telnet is not available, download PuTTY. It is a far superior Telnet, SSH, etc. Do you want a tool for doing it? Otherwise, you need some other server to call you back to see if a port is open Another option is tcping. PsPing from Sysinternals is also very good. You can ping a server and a port and it will tell you the state of the port.
There is a command-line utility and a UI for it. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. How do I determine if a port is open on a Windows server? Asked 13 years, 2 months ago. Active 2 years ago. Viewed 2. Improve this question. Peter Mortensen Jason Jason See also serverfault.
Add a comment. Active Oldest Votes. Assuming that it's a TCP rather than UDP port that you're trying to use: On the server itself, use netstat -an to check to see which ports are listening. On that latter test, then in general: connection refused means that nothing is running on that port accepted means that something is running on that port timeout means that a firewall is blocking access On Windows 7 or Windows Vista the default option 'telnet' is not recognized as an internal or external command, operable program or batch file.
Improve this answer. Alnitak Alnitak k 70 70 gold badges silver badges bronze badges. In Win7 or Vista defaul option 'telnet' is not recognized as an internal or external command,operable program or batch file. In the list, scroll down and select Telnet Client and click OK — volody. PankajKohli use PuTTy telnet client instead. It does not need to be installed. Alnitak I just wanted to check as I think this already answers my question.
When I do telnet api-3t. Could not open connection to the host on port Connect failed Is this because the firewall is blocking it? Show 5 more comments. Celmer J. Celmer 2, 1 1 gold badge 10 10 silver badges 2 2 bronze badges. MoatazElmasry, that's true on Linux, but this is on a Windows server, where find is the correct command.
Grep is not available on Windows. I just ran the exact command mentioned here, and it worked perfectly. When I used that command i. Show 3 more comments. If you're checking from the outside, not from the server itself, and you don't want to bother installing telnet as it doesn't come with the last versions of Windows or any other software, then you have native PowerShell: Test-NetConnection -Port -ComputerName Check this table: Even though you can upgrade your version of PowerShell by installing the Windows Management Framework 4.
This is the best answer. Installing telnet isn't always straight-forward on other people's servers! Best External Solid State Drives. Best Portable Chargers. Best Phone Chargers. Best Wi-Fi Range Extenders. Best Oculus Quest 2 Accessories. Awesome PC Accessories. Best Linux Laptops. Best Wireless iPhone Earbuds. Best Bluetooth Trackers. Best eReaders. Best VPN. Browse All News Articles. Baby Shark YouTube. Venmo Gifts. Fortnite iPhone. Quest Headset SteamVR. M1 Mac Dropbox. Windows 11 Uninstall Clock.
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