Re: unusual user activities

[websicher () googlemail com]

Hi,

"unusual behaviour" is a very wide field from my perspective - but let's give it a try:

#1: Use of (web) proxy:
You could monitor the URLs the user called. If ofentimes a web proxy website is visited (e.g. hidemyass.com) it could 
be hint for illegal web activities (e.g. trying to hack sth.)

#2: Online bookmarks:
Primarily it's not a network topic but a security issue I witnessed some years ago. A company's employee stored his 
bookmarks to internal servers (including port numbers, etc.) on a publicly accessible external bookmarking website.

#3: Number of uploads:
If there's a remarkable number of uploads from the user's PC it may be the case that he "exports" company data to his 
own storage area, e.g. Google Docs. You should monitor the upload traffic.

#4: Upload / Download volume:
You should compare the user's upload and download data volumes compared to the average of employees with the same job 
position or in the same department. (e.g. an IT person will probably have a higher volume than an HR employee)
If the volumes are significantly above the average you should closely monitor the traffic.

Well that's all I can think of at the moment. If you provide more details on which areas you'd specifically like to 
cover maybe we can add more ideas.

Cheers,
Pascal

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