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Re: Messenger service abuse (from inside the network)
From: Jimi Thompson <jimit () myrealbox com>
Date: Sat, 06 Dec 2003 14:26:05 -0600

I'd also suggest going to management and having them issue a policy with as many teeth as possible, preferably advocating firing the offender. Have HR make everyone read and sign. First violator gets smacked as hard as possible, again perferably fired. That should get the rest of them in line. Unfortunately, it's illegal to physically abuse id10T end users. Sounds draconian, but if they are creating a DOS situation on their own network, they aren't undeserving.

2 cents,

Jimi



Brad Arlt wrote:

On Wed, Dec 03, 2003 at 09:58:11PM +0200, Alexander Lukyanenko wrote:
The problem is that the users abuse the Messenger service by sending
some mischief over the network (furthermore, they even write batch
files that repeatedly flood the domain with same text).

Ahh... I remember doing the same thing in high school. Fond memories
of mischief...

You could use a network monitor or sniffer to tell which IP sent the
message.  Then you can use the IP to co-relate with users, and smack
them around later. It doesn't stop this from happening, but it might
provide accountablity.

This could be really difficult to pull off with any credability with
one common account.

You might consider installing another software to accomplish the
messaging, rather than using the default software.  You could then
disable the default messaging.

And if your users don't have Administrator you could use the packet
filter in XP/2K to only deny messages not from your admin server (or
where ever you decide to send messages from).  But I don't know if the
default packet filter in XP/2K is flexable enough to handle such a
task.
-----------------------------------------------------------------------
  __o           Bradley Arlt                    Security Team Lead
_ \<_                arlt () cpsc ucalgary ca                University Of Calgary
(_)/(_)         Joyously Canadian               Computer Science

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