Question

Locked

DETERMINE THE INTERNAL USER BEHIND FIREWALL

By erdsec ·
HI ALL,
I AM AN IT ADMINISTRATOR AND I AM USING A FIREWALL TO PROTECT THE INTERNAL USERS FROM INTERNET AND I USE PRIVATE IP FOR MY LOCAL NETWORK WHICH APPEARS FOR THE INTERNET AS A SINGLE REAL IP THE PROBLEM THAT I HAVE ONE OF THE LOCAL USERS WHO SENDS BAD AND MISUSE EMAILS FROM MY NETWORK AND I CANT DETERMINE WHO IS THAT LOCAL USER BECAUSE HE USES WEB MAIL LIKE YAHOO SO IS THERE ANY APPLIANCE OR SOFTWARE CAN BE USED TO DETECT THAT USER
THANK YOU ALL

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same problem

by chhatraliamd In reply to DETERMINE THE INTERNAL US ...

Dear friend

i am facing same problem can you answer / help me which precaution you take please.

waiting from your end

regards

chhatraliamd

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Well a remedy is:

by rob mekel In reply to DETERMINE THE INTERNAL US ...

cut out webmail

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Just put a hub and protocol analyzer on the LAN port of your firewall

by robo_dev In reply to DETERMINE THE INTERNAL US ...

With a program like WireShark you can capture all the network traffic and see what is what.

A content filtering proxy server like WebSense can block sites like yahoo mail.

you should take a look at your caps lock key, it seems to be stuck.

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