Checking If Ports Are Open Using Powershell

Anthony Nocentino has a quick Powershell script to see if ports are open on a machine:

Ever want to confirm that a port is accessible from one computer to another? There’s a PowerShell cmdlet for that, Test-NetConnection. With the -Port option, this cmdlet will do a quick TCP three-way handshake on the remote system to confirm that the service is available and reports back if it succeeded or not. Check out that last line of output TcpTestSucceeded: False. That indicates that this port is not accessible. You can see, however, that the system is reachable via ICMP (Ping), PingSuceeded: True so we know that the remote system is alive, just not listening on the port we want to access.

For when your security team won’t let you install nmap.

Related Posts

Exporting SQL Server Tables to Excel with Powershell

Aaron Nelson shows how you can export the tables in a SQL Server database to Excel, using a warehouse as an example: Obviously, you have to have the module installed, and a copy of AdventureWorksDW2017 db restored to a SQL Server.  After that,  all you have to do is loop through the tables, ‘query’ them with […]

Read More

Desired State Configuration: Managed Object Format Files

Jess Pomfret explains what Managed Object Format (MOF) files are and why they’re useful for Desired State Configuration: When I run this script I see the output in the screenshot below, a MOF file has been created in my output folder. Managed Object Format (MOF) files are used to describe Common Information Model (CIM) classes, […]

Read More

Categories

November 2018
MTWTFSS
« Oct Dec »
 1234
567891011
12131415161718
19202122232425
2627282930