On Wed, Dec 05, 2007 at 06:05:04PM -0800, Ernest Prabhakar wrote:
> Hi Dale,
>
> On Dec 5, 2007, at 5:47 PM, Dale Schack wrote:
>> It turns out that the user "nobody" no longer has the ability to read the
>> NFS mounted directories. My question to the group is this: has anyone
>> tried using Xgrid on Tiger Server, with Leopard clients, reading data via
>> NFS? Have there been any changes with respect to NFS and security that
>> may be the cause of this change?
>
> I can't be sure this is _your_ issue, but NFS in Leopard now users Kerberos
> for authentication instead of userid. I'm not sure which is the default,
Kerberized NFS is not on by default on NFS exports.
It needs to be explicitly configured on the export.
So this wouldn't be causing any problem unless the
Leopard NFS client was explicitly requiring Kerberos
with the mount option: -o sec=krb5
Dale,
We'll need some more details to try to figure out what the
problem is in your case.
Is the NFS file system mounting successfully on the client
or is the mount failing? How is it being mounted? Is it
automounted? What mount options are used? Are there any
NFS messages in /var/log/system.log on the client or server?
Does the "nobody" user have the same UID/GID on the client and
the server?
Would it be possible to get a tcpdump capture file showing the
full network packets when it isn't working? Start the following
command on the server (where the last argument is the actual name
or IP address of the client):
sudo tcpdump -ns0 -w /tmp/packets.pcap host CLIENT_NAME_OR_IP
Reproduce the problem, then Ctrl-C the tcpdump command and forward me
the packets.pcap file (don't send it everyone on the mailing list)....
or attach it to a bug report: http://bugreporter.apple.com
Thanks!
--macko
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