is there something unreliable about "showmount -e"?
Robert P. J. Day
rpjday at mindspring.com
Sat Jul 28 15:57:14 UTC 2007
On Sat, 28 Jul 2007, Tom Weniger wrote:
> On 7/28/07, Robert P. J. Day <rpjday at mindspring.com> wrote:
> > just yesterday, i was demonstrating NFS to a class of people
> > running F7 on their laptops, and i set up a simple NFS export on
> > one system, and asked everyone else to run "showmount -e" against
> > that server.
> > only one system in the class got output from showmount, although
> > everyone could ping the server properly. i found this just a bit
> > odd, and spent a few minutes trying to figure out what was
> > happening, to no avail.
> > these were 64-bit F7 installs, and i didn't get a chance to see
> > if a 32-bit install would work any differently. so, is there some
> > reason i would have seen this behaviour? the showmounts didn't
> > fail with error messages, they just returned nothing (in most
> > cases). thoughts?
> Greetings Robert,
> I have seen this result when the firewall is blocking the NFS ports.
i thought of that, and had everyone disable their firewall (it was an
internal classroom LAN so no security implications.). still, nothing.
it may be that, since it was the students who did the installation on
their own systems, they may have done something screwy, but it was
just weird that, out of 7 people, only 1 had a showmount that did the
i'm sure it was a misconfiguration of some kind, i can't believe that
showmount itself would have a bug of that severity. thanks. the next
time the class rolls around, i'll test that more thoroughly.
Robert P. J. Day
Linux Consulting, Training and Annoying Kernel Pedantry
Waterloo, Ontario, CANADA
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