Re: [opensuse] nfs server /require/ reverse DNS lookup working?!

Hi Zhang,
Sorry it took a few days to reply.

On Tue, 2007-04-10 at 21:08 +0800, Zhang Weiwu wrote:
On Mon, 2007-04-09 at 22:14 -0500, Ken Gramm wrote:
Hello Zhang,
Have you considered that it might actually be a security issue? When
you installed the MS SFU NFS client how did you answer the Username
Mapping Server question?

I totally do not understand username mapping server and I am not sure if
I need it.

As the name implies, the username mapping server is used to match
Windows user ID's to your *nix user ID (i.e. SID to UID matching).
Without it, your Windows client will not be able to provide the NFS
server with the proper UID.

If your Windows box gets it's username from a Domain, you'll need to
install the mapping server on one of your DCs and then point your
workstation to the correct server. If it is a stand-alone machine (or
if your using a local account), you'll need to install the username
mapping locally.

As I am setting up read-only NFS exports applying restriction
only on IP addresses, I just think perhaps I can forget all these
authentication and authorization things. However so far I could not
successfully connect SFU to ANY nfs server in my office, I tried
opensuse, gentoo Linux and FreeBSD. SFU always ends up with a message
from SFU: "Network Path Not Found." I tried these to get around the
error message, all failed:

How are you trying to connect to the NFS server? For me, I just right
click on "My Network Places" and select "Map Network Drive". Then I
enter the path (i.e. \\servername\share_name). When you click OK, you
should get a "NFS Login Successful" dialog box that summarizes your
current login credentials and asks if you'd like to accept the current
login or change your login settings. Once finished, you should have a
drive mapped to your NFS share.


1. use IP address in /etc/exports rather then hostname or wildcard
2. supply no_auth_nlm to Linux's /etc/exports (FreeBSD I cannot
find this parameter);
3. switch between TCP and UDP on SFU;

The last thing I didn't try is to set up reverse DNS lookup, which is
impossible because the whole campus have been running without reverse
DNS for a lot of years and it will not be changed because I want it to
change.

I'll admit that I've always use reverse DNS, but if you enter the
machines into the hosts file you should get the same effect.


Good luck!

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