How do I connect my Bricasti M21 DAC to my MAC Computer using the Network (Ethernet)

As I reported above, the Firewall setting on my MAC Computer was set to BLOCK ALL incoming connections.   This means Audirvanna was UNABLE to connect to and recognize my Bricasti M21 DAC.   I unchecked the box, started Audirvana and it FOUND my Bricasti M21 DAC in 2 seconds.  

HOWEVER, I now have serious security issues with my MAC Computer.  If I OPEN my MAC Computer Firewall to ENABLE Audirvana to connect to my DAC, it means my MAC security is compromised.   I am 'paranoid' about computer security AND it is better to be safe than sorry.   The protection of my computer data is much MORE important than an audio connection.

This means I will NOT be using Audirvana  and it has already been deleted from my MAC computer.   My MAC Firewall is set for top security.

I am now testing MConnect and it requires no Firewall changes.  It connects perfectly to my Bricasti M21 DAC.  
  
I do not understand why Audirvana requires me to compromise my MAC computer Firewall security and MConnect does not.   I also plan on looking an HQ Player and ROON sometime in the future (maybe).  

A special thanks to Bricasti and Steve from Sounds of Silence for all their help.   Thanks again to everyone who posted above.   I appreciate the many comments, suggestions, etc. from everyone.  Cheers. 

Well done!

This stuff can drive you crazy.

I don’t own a Bricasti but am thinking about the M3. AFAIK you can use the Linn Kazoo and Lumin apps on your iPad with your Bricasti. Both offer an elegant UI with Tidal, Qobuz, Spotify and TuneIn radio, etc. I currently use Linn as my digital front end. I also use Roon and tested the Lumin app. All work...

@photomax, Great suggestion.  Thanks. 

Please confirm I can install the Linn Kazoo App on my iPad and it will connect with my Bricasti DAC?   Do I also need Linn Kazoo software running on my Mac computer?  

There is a piece of software called Konfig that you might need on your Mac? This is a just a settings/preferences/handshake pane. You can then add the Kazoo app to your iPad. 
I have not tried this as I don’t own a Bricasti. A dealer did say you can do this though. 
The Linn App, Linn Kazoo app and the Lumin app are full apps with features. They are free. Roon should work for you as well but that costs money. 

Thanks.   As you suggested, I installed Linn Kazzo on my iPad and unable to connect to my Bricasti DAC or QoBuz.   I emailed Linn Products and ask them for help.