From: Greg Banks <gnb@melbourne.sgi.com>
Subject: Re: auto-discovery of exports?
Date: Thu, 08 Apr 2004 17:07:25 +1000
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To: Olaf Kirch <okir@suse.de>
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Olaf Kirch wrote:
> 
> Some portmaps may actually allow calls to the NFS NULL procedure, but
> many don't.

The ones based on modern ONC code, like Solaris and IRIX, explicitly
allow NULL calls before doing their fancy checks based on program numbers.
I'd be interested to hear of actual counterexamples.

> I wrote a tool for enumerating NFS servers a long time back, and found
> the only way to go about it is to enumerate all hosts first, then do a
> pmap_getport(100005), and then call each mountd i turn.

Sure, a two stage approach will work: broadcast RPC to find hosts
running portmappers, then try showmount -e on each.

Greg.
-- 
Greg Banks, R&D Software Engineer, SGI Australian Software Group.
I don't speak for SGI.


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