[wplug] Discuss: Networking in an insecure world

John Harrold jmh17 at pitt.edu
Fri May 6 15:14:24 EDT 2005


Sometime in May Dane Miller assaulted the keyboard and produced:

| One of my gripes with NFS/NIS is that I can't tell who is logged in and
| accessing the server.  This, I think, is because both are stateless
| protocols.  I'm using NFSv3 over TCP and can discover _active_ NFS
| connections with netstat -t.  But I can't tell if, for example, a user
| logged in and then left her machine.  Is there a better way to monitor
| NFS/NIS connections to a server?

I've never really had to do this, so I cannot offer any help.

| Another gripe is the $@%* file locking problems with NFS.  The situation
| has improved in the 2.4.2x kernels, but the NFS mailing list is still
| rife with lock issues (or at least it was when I un-subscribed last
| fall).  Have you had to deal with file locking bugs?

I don't think we've had too many issues with file locking. For the most
part, everyone has their own desktop machine which they sit in front of. We
connect to computers in a different room to run simulations and other
number crunching tasks. So the only think we are likely to run into locking
problems with are text files with source code. Most of us use gvim which I
don't believe locks the file, but rather seems to "look" at the file. So,
if I try to edit a file in another vim session it will tell me it's already
being edited somewhere else. If I edit it anyway, the original vim editor
says "hey this file changed, do you want to load the changes" or something
similar. Occasionally I'll delete a file that is open on another computer.
The file is then renamed to .nfs###### or something similar. 



-- 
---------------------------------------------------------- 
                            | /"\                         
 john harrold               | \ / ASCII ribbon campaign   
 jmh at member.fsf.org      |  X  against HTML mail       
 the most useful idiot      | / \                         
----------------------------------------------------------
 What difference does it make to the dead, the orphans, 
 and the homeless, whether the mad destruction is brought 
 under the name of totalitarianism or the holy name of 
 liberty and democracy?
 --Gandhi
----------------------------------------------------------
  gpg --keyserver pgp.mit.edu --recv-key B23241CB
----------------------------------------------------------
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 189 bytes
Desc: Digital signature
Url : http://www.wplug.org/pipermail/wplug/attachments/20050506/42a3919a/attachment.bin


More information about the wplug mailing list