I am network administrator in one of the company in malaysia, and a novice in IT security.
Lately, an internal intruder who able to sniffer the packet in my network send an email to me everyday, and telling me all the activities that i did. For eg. The content of email that i sent out by using my hotmail account, attachment file sent, the files that i transfered over my internal network.
I felt so unsecure now, i am keen to know what are the tools available that enable the internal intruder to do so, and any tools avaiable to overcome this problem. Please help............
I am using PIX firewall and ISS realsecure IDS in my network, and all kinds of cisco router and switches.