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ASA Dropping internal Packets after reaching scanning rate limit...

stownsend
Level 2
Level 2

I have the threat-detection setup like the following:

threat-detection rate scanning-threat rate-interval 600 average-rate 6 burst-rate 20

threat-detection rate scanning-threat rate-interval 1200 average-rate 5 burst-rate 15

threat-detection rate scanning-threat rate-interval 3600 average-rate 4 burst-rate 8

threat-detection basic-threat

threat-detection scanning-threat shun except ip-address 10.1.0.0 255.255.0.0

threat-detection scanning-threat shun except ip-address 10.2.0.0 255.255.0.0

threat-detection scanning-threat shun except ip-address 10.1.0.40 255.255.255.255

threat-detection scanning-threat shun except ip-address 10.4.5.0 255.255.255.0

threat-detection scanning-threat shun except ip-address 10.1.5.0 255.255.255.0

threat-detection scanning-threat shun except ip-address 10.2.5.0 255.255.255.0

threat-detection scanning-threat shun duration 3600

threat-detection statistics host

threat-detection statistics port

threat-detection statistics access-list

threat-detection statistics tcp-intercept rate-interval 30 burst-rate 400 average-rate 200

Though I still receieve these events in the syslog.

1/31/2012 7:05:29 AM

%ASA-4-733100: [ Scanning] drop rate-3 exceeded. Current burst rate is 9 per second, max configured rate is 8; Current average rate is 0 per second, max configured rate is 4; Cumulative total count is 3290

1/31/2012 7:05:09 AM

%ASA-4-733100: [ Scanning] drop rate-1 exceeded. Current burst rate is 26 per second, max configured rate is 20; Current average rate is 2 per second, max configured rate is 6; Cumulative total count is 1590

1/31/2012 7:05:09 AM

%ASA-4-733100: [ Scanning] drop rate-2 exceeded. Current burst rate is 20 per second, max configured rate is 15; Current average rate is 1 per second, max configured rate is 5; Cumulative total count is 1713

1/31/2012 7:04:29 AM

%ASA-4-733100: [ Scanning] drop rate-1 exceeded. Current burst rate is 31 per second, max configured rate is 20; Current average rate is 1 per second, max configured rate is 6; Cumulative total count is 792

1/31/2012 7:04:29 AM

%ASA-4-733100: [ Scanning] drop rate-2 exceeded. Current burst rate is 15 per second, max configured rate is 15; Current average rate is 0 per second, max configured rate is 5; Cumulative total count is 919

1/31/2012 6:22:31 AM

%ASA-4-733100: [ Scanning] drop rate-1 exceeded. Current burst rate is 20 per second, max configured rate is 20; Current average rate is 1 per second, max configured rate is 6; Cumulative total count is 805


The Devices that are generating them (I believe) are IP Phones. They are the devices listed in the 10.x.5.0/24 range.

When I do a 'show shun'  I get nothing back.

What Gives?

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