Here is the setup:
Snort listening on traffic flowing between internal users and http
proxy. Snort listening on traffic flowing between internal proxy and
external web servers. As anticipated, many rules are triggered on the
traffic between the internal proxy and the external web servers. BUT,
same rules are not triggered on same traffic between the http proxy and
the internal users.
What I am trying to achieve is see an alert between the internal http
proxy and external webservers, and correlate to an alert on the same
traffic, but as it flows between the internal users and the internal
http proxy. For some reason, only the outside traffic is triggering the
alert. To confirm snort and variables are setup correctly for testing
so that I should see alerts, I confirmed can trigger rules on ICMP
traffic between the internal http proxy and the internal users.
It appears that the proxy is doing something to the traffic as it flows
between the internal http proxy and the users, so that is not detected
by snort rules.
Any thoughts or suggestions on where to start tinkering?
Thanks in advance,
Scott
Scott Gould
Senior Network & Systems Analyst
Gynecologic Oncology Group
Statistical & Data Center
scott.gould@gogstats.org
716-845-5702
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