mountd requests

Paul A Procacci pprocacci at
Wed Apr 1 00:36:18 PDT 2009

Hey All,

We have a shared nfs machine that is used between multiple client
machines.  While this in itself is ok, any client that issues a
`showmount` command can see the other mounts that are currently
established.  I can't for the life of me figure out how this is a good
thing.  I big security related `no no` comes to mind whenever I see all
mounts from all clients returned back to me from a client.  Now, mountd
doesn't have a `secure` option to turn this off, but I have developed an
untested patch for doing this.  I think the reasonable default behavior
would be to return only mounts that the physical host making the request
currently has established.

I guess my real question is, has anyone ever been concerned by this?


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