"floris" <nospam@no.spam> wrote in
news:bj2k5r$m8b$1@news-reader1.wanadoo.fr:

> Hi group,
>
> this one has probably been asked already, but i'm new to the newsgroup
> so my apologies;
>
> any signs that will show this? any programs i can use?
>
>

The programs you are looking for are called Intrusion Detection Systems.
See http://www.itsecurity.com/asktecs/jul3302.htm

SNORT is a popular free Network IDS. I have used Tripwire, the Linux
version is free. The windows version probably costs big bucks.

data64