[CentOS] Microsoft-ds and H.323/Q.931? Which services are these?

> PORT     STATE    SERVICE
> 445/tcp  filtered microsoft-ds
> 1720/tcp filtered H.323/Q.931
> 
> which programs are these, and why should they be part of a server install? How can I find them so I can uninstall them?

To find out what program has any port (or file) open, use lsof.

sudo /sbin/lsof -i TCP:445

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