Nmap is one of the most intesively used by linux admins tools. It is widely known one can check out TCP port’s state on given hosts. As far as now, I was unable to find correctly working replacement for windows. Of course, there are many of migration’s attempts based on CygWin or SFU/SUA, but they require wider permissions in contrast to those that users usually have on their machines.
That is why I want to introduce you to real Microsoft replacement of this tool: PORTQRY. This tool is as usable as nmap and I can recomend it for use in every Windows Enviroments. It has one more important advantage in comparition to nmap. It can follow dynamic RPC ports used by DCOM. RPC and DCOM are heavily used by most of Windows enviroment services such as Active Directory, Certificates Service or Exchange. These are only examples of usage this technology.
Finally I wish everyone as little as possible time with network time down in yours enviroments.