[Oisf-users] How to show what ip address do the request inside an alert

Peter Manev petermanev at gmail.com
Mon Aug 26 17:56:00 UTC 2013

On 26 aug 2013, at 18:41, "Cooper F. Nelson" <cnelson at ucsd.edu> wrote:

> Hash: SHA1
> That won't work for IP-only rules, as they will only trigger on the
> outside of the proxy.
> If you are using a web proxy, you can add the "X-Forwarded-For" header
> to show the origin IP.  You can then use unified2 alerts and write a
> perl/python script to extract the source IP and produce a new log.  Or
> if you are using a front-end like Snorby you could just check the logged
> payload.
> If you don't want to leak the origin IP you could probably write a
> post-processor that would merge the suricata logs with proxy logs.  But
> suricata does not have this feature built-in.
> - -Coop
> P.S.  Would be nice if libhtp had the feature to "follow X-Forwared-For"
> to allow logging of origin IPs.

http.log has that custom logging feature(X-Forwarded...). Is this what you have in mind or you mean more like an "alert" log feature?

> On 8/26/2013 5:16 AM, Peter Manev wrote:
>> On Mon, Aug 26, 2013 at 1:22 PM, C. L. Martinez <carlopmart at gmail.com> wrote:
>>> Hi all,
>>> I have one suricata sensor monitoring proxy traffic that comes and go
>>> to it ... All works ok (until now), but I would like to see what ip
>>> address do certain request inside the alert. For example:
>>> 08/26/2013-10:18:01.195424  [**] [1:2520396:1580] ET TOR Known Tor
>>> Exit Node Traffic (199) [**] [Classification: Misc Attack] [Priority:
>>> 2] {TCP} ->
>>> is my internal proxy, but the request comes from an internal
>>> workstation. How can I add workstation IP to this alert??
>> I think it is best to put the ids box behind the proxy. That way you
>> would see the internal IPs as well.
>>> Is it possible to do it??
>>> _______________________________________________
> - -- 
> Cooper Nelson
> Network Security Analyst
> UCSD ACT Security Team
> cnelson at ucsd.edu x41042
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