how to restrict amount of data sent to internet

Hi,
I am administrator. We've all linux boxes. We wish to restrict users
from sending any data more than 1kb to internet. How could I accomplish
that?
Thanks & Regards,
Naren.

Hi Davide,
For that matter, any data sent out of our network. We're trying to
make sure that they don't send any company's confidential info out of
our network. If we find 1 kb is very small, then we could have it as 4
kb. But the idea is to restrict the user to send only a limited stream
of packets out at a time to preserve our confidential data.
Hope it explains...
Rgds,
Naren.

narenkumaraguru@yahoo.co.uk wrote:
> For that matter, any data sent out of our network. We're trying to
> make sure that they don't send any company's confidential info out of
> our network. If we find 1 kb is very small, then we could have it as 4
> kb. But the idea is to restrict the user to send only a limited stream
> of packets out at a time to preserve our confidential data.
> Hope it explains...

And what prevents me from splitting your confidential data into chunks
of 1 kb, and sending those out ? You can't prevent users stealing data
his way. Start with auditing, and a proxy that maps connections to users.


Igmar

Could you elaborate on this more?? Could you also give me more pointers
??

narenkumaraguru@yahoo.co.uk wrote:
> Could you elaborate on this more?? Could you also give me more pointers
> ??
>

Are you talking about sending out 1 or 4kB attachments in emails or just
general traffic? If you want to do this you will also need to specify a
time interval as the kB's through the router really mount up quickly
just doing not much. Also check your inbox. Even text emails are 1 or 2 kB.

Further, if you're going to restrict internet bandwidth, there's nothing
to stop users loading stuff onto a USB key/HDD and taking that off site
- certainly not in Windows anyway. Linux, you can prevent a mount
operation. Failing that, what's to prevent your untrustworthy users from
just printing stuff out and taking hard copies?

A lock only keeps the honest people out...