Question about serving directory information

[Tom Hek]

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Hello fellow Tor-users :),

I'm trying to run a Tor node that will only serve Directory information.
My hoster doesn't allow me to run a Tor relay, but I want to let him
donate his bandwidth to the Tor project by serving Directory
information. But when I turn off the ORPort, Tor doesn't publish his
DirPort.

Is there a way to let Tor listen on his DirPort and let Tor serve
Directory data on this port but not do any relaying of other traffic
through it?

Thanks in advance,

Tom
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