Snort mailing list archives
Re: Alerts with the incorrect Source IP (proxy server)
From: Bamm Visscher <bamm.visscher () gmail com>
Date: Thu, 25 Oct 2012 07:56:02 -0400
If he's logging the IP of the proxy and not the external website, then it sounds like the sensor is between the internal network and the proxy. If that is the case, enable_xff won't help since at that location the destination IP address hasn't been resolved (the proxy will do that). Brad - You can move the sensor outside the proxy and then you will get the external website IP address, but you may have to re-architect your proxy (turn on x-forwarded-for or use a transparent proxy) to be able to identify the internal source of the acty. Another option would be to add another sensor and sandwich the proxy between the two sensors. Bamm On Wed, Oct 24, 2012 at 2:10 PM, Joel Esler <jesler () sourcefire com> wrote:
If you have additional logging turned on, and your proxy supports it, (and you have "enable_xff") turned on in the snort.conf we'll log the actual IP in the additional data in the unified2 file. -- Joel Esler Senior Research Engineer, VRT OpenSource Community Manager Sourcefire On Oct 24, 2012, at 1:27 PM, Jeremy Hoel <jthoel () gmail com> wrote: What snort alerts what the IPs are from inside the packet. If you tcpdump that same connection and you are seeing the proxy talk to the client, and that's the packets that are making the alert then the way to fix that is to move the span port location. Snort only reports what it sees and it can't 'infer' what the original source of the packets are. But more examples of your network layout and an example of the alert might help. On Wed, Oct 24, 2012 at 5:04 PM, Turnbough, Bradley E. <bturnbough () belcan com> wrote: Hi Guys, I’m getting alerts generated, but they are coming up as the source IP of my proxy server. Is there a way to tell Snort / Barnyard2 / Snorby that it should report the IP address of the website instead? Thanks, Brad This e-mail transmission contains information that is confidential and may be privileged. It is intended only for the addressee(s) named above. If you receive this e-mail in error, please do not read, copy or disseminate it in any manner. If you are not the intended recipient, any disclosure, copying, distribution or use of the contents of this information is prohibited. Please reply to the message immediately by informing the sender that the message was misdirected. After replying, please erase it from your computer system. Your assistance in correcting this error is appreciated. ------------------------------------------------------------------------------ Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_sfd2d_oct _______________________________________________ Snort-users mailing list Snort-users () lists sourceforge net Go to this URL to change user options or unsubscribe: https://lists.sourceforge.net/lists/listinfo/snort-users Snort-users list archive: http://sourceforge.net/mailarchive/forum.php?forum_name=snort-users Please visit http://blog.snort.org to stay current on all the latest Snort news! ------------------------------------------------------------------------------ Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_sfd2d_oct _______________________________________________ Snort-users mailing list Snort-users () lists sourceforge net Go to this URL to change user options or unsubscribe: https://lists.sourceforge.net/lists/listinfo/snort-users Snort-users list archive: http://sourceforge.net/mailarchive/forum.php?forum_name=snort-users Please visit http://blog.snort.org to stay current on all the latest Snort news! ------------------------------------------------------------------------------ Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_sfd2d_oct _______________________________________________ Snort-users mailing list Snort-users () lists sourceforge net Go to this URL to change user options or unsubscribe: https://lists.sourceforge.net/lists/listinfo/snort-users Snort-users list archive: http://sourceforge.net/mailarchive/forum.php?forum_name=snort-users Please visit http://blog.snort.org to stay current on all the latest Snort news!
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Current thread:
- Alerts with the incorrect Source IP (proxy server) Turnbough, Bradley E. (Oct 24)
- Re: Alerts with the incorrect Source IP (proxy server) Jeremy Hoel (Oct 24)
- Re: Alerts with the incorrect Source IP (proxy server) Joel Esler (Oct 24)
- Re: Alerts with the incorrect Source IP (proxy server) Turnbough, Bradley E. (Oct 24)
- Re: Alerts with the incorrect Source IP (proxy server) beenph (Oct 24)
- Re: Alerts with the incorrect Source IP (proxy server) Jeremy Hoel (Oct 24)
- Re: Alerts with the incorrect Source IP (proxy server) Eric G (Oct 24)
- Re: Alerts with the incorrect Source IP (proxy server) Heine Lysemose (Oct 25)
- Re: Alerts with the incorrect Source IP (proxy server) beenph (Oct 25)
- Re: Alerts with the incorrect Source IP (proxy server) Heine Lysemose (Oct 25)
- Re: Alerts with the incorrect Source IP (proxy server) Joel Esler (Oct 24)
- Re: Alerts with the incorrect Source IP (proxy server) Jeremy Hoel (Oct 24)
- Re: Alerts with the incorrect Source IP (proxy server) Bamm Visscher (Oct 25)
- Re: Alerts with the incorrect Source IP (proxy server) Joel Esler (Oct 25)
- Re: Alerts with the incorrect Source IP (proxy server) Jason Haar (Oct 25)