01-30-2009
identd is a process that typically runs out of your inetd server. It keeps track of what user is running what TCP service, and then reports this to whoever requests it. I don't recall if it is required for NFS, so this might be off track..... if it is, I apologize.
Quote:
Many people misunderstand the usefulness of identd, and so disable it or block all off site requests for it. identd is not there to help out remote sites. There is no way of knowing if the data you get from the remote identd is correct or not. There is no authentication in identd requests.
Why would you want to run it then? Because it helps you out, and is another data-point in tracking. If your identd is not compromised, then you know it's telling remote sites the user-name or UID of people using TCP services. If the admin at a remote site comes back to you and tells you user so-and-so was trying to hack into their site, you can easily take action against that user. If you are not running identd, you will have to look at lots and lots of logs, figure out who was on at the time, and in general take a lot more time to track down the user.
The identd that ships with most distributions is more configurable than many people think. You can disable it for specific users (they can make a .noident file), you can log all identd requests (We recommend it), you can even have identd return a UID instead of a user name or even NO-USER.
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LEARN ABOUT CENTOS
tapset::nfs_proc
tapset::nfs_proc(3stap) tapset::nfs_proc(3stap)
NAME
tapset::nfs_proc - systemtap nfs_proc tapset
DESCRIPTION
nfs.proc.lookup
NFS client opens/searches a file on server
See probe::nfs.proc.lookup(3stap)
for details.
nfs.proc.read
NFS client synchronously reads file from server
See probe::nfs.proc.read(3stap)
for details.
nfs.proc.write
NFS client synchronously writes file to server
See probe::nfs.proc.write(3stap)
for details.
nfs.proc.commit
NFS client committing data on server
See probe::nfs.proc.commit(3stap)
for details.
nfs.proc.read_setup
NFS client setting up a read RPC task
See probe::nfs.proc.read_setup(3stap)
for details.
nfs.proc.read_done
NFS client response to a read RPC task
See probe::nfs.proc.read_done(3stap)
for details.
nfs.proc.write_setup
NFS client setting up a write RPC task
See probe::nfs.proc.write_setup(3stap)
for details.
nfs.proc.write_done
NFS client response to a write RPC task
See probe::nfs.proc.write_done(3stap)
for details.
nfs.proc.commit_setup
NFS client setting up a commit RPC task
See probe::nfs.proc.commit_setup(3stap)
for details.
nfs.proc.commit_done
NFS client response to a commit RPC task
See probe::nfs.proc.commit_done(3stap)
for details.
nfs.proc.open
NFS client allocates file read/write context information
See probe::nfs.proc.open(3stap)
for details.
nfs.proc.release
NFS client releases file read/write context information
See probe::nfs.proc.release(3stap)
for details.
nfs.proc.handle_exception
NFS client handling an NFSv4 exception
See probe::nfs.proc.handle_exception(3stap)
for details.
nfs.proc.create
NFS client creating file on server
See probe::nfs.proc.create(3stap)
for details.
nfs.proc.remove
NFS client removes a file on server
See probe::nfs.proc.remove(3stap)
for details.
nfs.proc.rename
NFS client renames a file on server
See probe::nfs.proc.rename(3stap)
for details.
SEE ALSO
probe::nfs.proc.lookup(3stap), probe::nfs.proc.read(3stap), probe::nfs.proc.write(3stap), probe::nfs.proc.commit(3stap),
probe::nfs.proc.read_setup(3stap), probe::nfs.proc.read_done(3stap), probe::nfs.proc.write_setup(3stap),
probe::nfs.proc.write_done(3stap), probe::nfs.proc.commit_setup(3stap), probe::nfs.proc.commit_done(3stap), probe::nfs.proc.open(3stap),
probe::nfs.proc.release(3stap), probe::nfs.proc.handle_exception(3stap), probe::nfs.proc.create(3stap), probe::nfs.proc.remove(3stap),
probe::nfs.proc.rename(3stap), stap(1), stapprobes(3stap)
IBM
--- tapset::nfs_proc(3stap)