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Author Topic: SFR monitor only on ASA 5585-X  (Read 7829 times)

Offline gvoden

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SFR monitor only on ASA 5585-X
« on: March 27, 2016, 01:49:06 PM »
I am trying to use my ASA 5585-X as a pure sniffer where it sends all traffic to the SFR module without having to use the policy map redirect method.

I am following this doc:
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When I enter the below command at interface level it's all good:
traffic-forward sfr monitor-only

However doing a "show run" doesn't list that command and even though traffic is received on the physical port it does not get processed.
Does it matter which ASA ports I am using?

Offline MC

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Re: SFR monitor only on ASA 5585-X
« Reply #1 on: March 27, 2016, 10:17:28 PM »
Does Firepower mgmt center does not see traffic from the FP module? I assume you already have FP added as a device on mgmt center, as well as having ASA running in transparent single-context mode. I don't believe which interface you use matters.
Below is a link to discussion similar to what you are trying to do if that helps.

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Offline gvoden

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Re: SFR monitor only on ASA 5585-X
« Reply #2 on: March 28, 2016, 01:40:22 AM »
So it looks like this is a bug in the code for the ASA - I am on 9.3.2 and entering the command "traffic-forward sfr monitor-only" does not actually apply to the configuration.

When I do "show run" the command does not appear under the interface config. It turns out this is fixed in ASA code 9.5.2

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I upgraded one of my spare boxes to 9.5.2 and now I see the "traffic-forward" command applied in the configuration. Next step will be to send SPAN traffic to make sure it actually works.

Offline MC

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Re: SFR monitor only on ASA 5585-X
« Reply #3 on: March 31, 2016, 08:40:36 PM »
Bug sounds about right.. Thanks you sharing the resolution.

Offline gvoden

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Re: SFR monitor only on ASA 5585-X
« Reply #4 on: April 08, 2016, 05:37:38 AM »
Just sent SPAN traffic to the 5585-X and it works fine - FirePOWER can identify the app traffic without issues.

Offline MC

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Re: SFR monitor only on ASA 5585-X
« Reply #5 on: April 10, 2016, 09:15:37 PM »
Thanks for an update gvoden.  :D

 

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