From: Trond Myklebust <trond.myklebust@fys.uio.no>
Subject: Re: Tracking rpc errors 'svc: unknown version (0)'
Date: 17 Jul 2002 17:09:24 +0200
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To: "Jarod Beekman" <JBeekman@apu.edu>
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>>>>> " " == Jarod Beekman <JBeekman@apu.edu> writes:

     > I upgraded our nfs server from 2.4.9-34 Redhat 7.2 to 2.4.18-5
     > Redhat
     > 7.3 and I am now seeing 'svc: unknown version (0)' errors.
     > Poking around on the list and the net tells me that this is a
     > reflection of an unrecognized rpc request.  Is this correct,
     > and if so is there a way to track down the source and nature of
     > the request?  Thanks for your help.

'ethereal' should be able to help you out here.
Just look for a null 'version' field in the RPC header: that should
tell you who and what the offender is.

If I were to hazard a guess, though, I'd expect that you will find
this is a NULL RPC request (i.e. the procedure number is '0') which is
often used in order to probe for whether or not an RPC server is up.

Cheers,
  Trond


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