NFSv3+Krb5 and mountd

[Per Olofsson <pelle@dsv.su.se>]

Hi,

I'm trying to use NFSv3 with Kerberos 5. I'm using Debian sarge with
Linux 2.6.7, nfs-utils 1.0.6 with the CITI_NFS4_ALL-13 patch, and
util-linux mount 2.12 with the CITI_NFS4_ALL patch.

I added the following definition to /etc/exports:

/tmpexp gss/krb5(rw)

Then, on the client, I run:

# mount -osec=krb5 oberon:/tmpexp /mnt
mount: oberon:/tmpexp failed, reason given by server: Permission denied

and it fails. According to the log:

Aug 23 19:17:48 oberon rpc.mountd: refused mount request from
mallinux.dsv.su.se for /tmpexp (/): not exported

Now, I add the client machine's name to /etc/exports:

/tmpexp gss/krb5(rw) mallinux(ro)

And it works! I can tell that it uses Kerberos because I can write to
the mounted fs if I have a ticket, but not without. The drawback is
that I am now allowing AUTH_SYS mounting as well, which I want to
avoid. Is this a bug in mountd? Is it difficult to fix?

-- 
Pelle


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