If you prefer using the command line or want a portable version without the UI:
Elias remembered a utility he hadn't used since the Windows 2003 days. It wasn't installed by default on modern Windows servers, but it was a lifesaver when the gods of Networking and Sysadmin were at war.
Here are some common error messages you may encounter while using PortQry: install portqry
If you just need the command-line tool quickly:
Once installed, you can use PortQry from the command line. The basic syntax of PortQry is: If you prefer using the command line or
cd C:\Tools\PortQry
TCP port 1433 (ms-sql-s service):
The network guy, halfway out the door, replied, "Nah, we have a global allow rule for that VLAN. The firewall logs show nothing. It’s not us. Must be your server."
"It’s a firewall block," Elias deduced. "Somewhere between here and there." The basic syntax of PortQry is: cd C:\Tools\PortQry