ASA interface utilsation peaks to 100 Mbps

Dear all,
We are using asa 5510 having Version 7.0(7).Some times its DMZ interface and Outside interface utilisation suddently rised to 100 Mbps and come down after 30 sec, That time the cpu utilisation its normal
CPU utilization for 5 seconds = 5%; 1 minute: 6%; 5 minutes: 6%
But internet connection and DMZ server accesing are not working.
Please help me for resolving the issue.
I will send the full config if reqired.
Thanks& Regards
Sihanu.N

In addition to suggestions from Jumora-
1. What servers/serivices you are running in DMZ? Make sure all the servers OS patched up to date.
2. 7.0(7) itself is very old IOS. Consider upgrade IOS to 8.0.x and still the memory utilization on ASA is low, go for 8.2.x.
3. Also, refer to below doc with some information on how to mitigate network attacks on ASAs, this may help you as well..
http://www.cisco.com/en/US/products/ps6120/products_tech_note09186a00809763ea.shtml
hth
MS

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72           2013/04/17 10:10:59.640 MST     192.168.100.12 Apr 17 2013 17:10:58: %ASA-6-302013: Built inbound TCP connection 11283929 for Net:192.168.100.17/62287 (192.168.100.17/62287) to identity:192.168.100.12/443 (192.168.100.12/443)
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69           2013/04/17 10:10:59.640 MST     192.168.100.12 Apr 17 2013 17:10:58: %ASA-6-605005: Login permitted from 192.168.100.17/62286 to Net:192.168.100.12/https for user "cisco"
68           2013/04/17 10:10:56.343 MST     192.168.100.12 Apr 17 2013 17:10:55: %ASA-6-302013: Built inbound TCP connection 11283774 for Net:192.168.100.17/62286 (192.168.100.17/62286) to identity:192.168.100.12/443 (192.168.100.12/443)
67           2013/04/17 10:10:56.343 MST     192.168.100.12 Apr 17 2013 17:10:55: %ASA-6-106015: Deny TCP (no connection) from 192.168.100.17/62285 to 192.168.100.12/443 flags FIN ACK on interface Net
66           2013/04/17 10:10:56.343 MST     192.168.100.12 Apr 17 2013 17:10:55: %ASA-6-302014: Teardown TCP connection 11283684 for Net:192.168.100.17/62285 to identity:192.168.100.12/443 duration 0:00:03 bytes 381 TCP Reset-O
65           2013/04/17 10:10:56.343 MST     192.168.100.12 Apr 17 2013 17:10:55: %ASA-6-605005: Login permitted from 192.168.100.17/62285 to Net:192.168.100.12/https for user "cisco"
64           2013/04/17 10:10:56.343 MST     192.168.100.12 Apr 17 2013 17:10:55: %ASA-6-606001: ASDM session number 0 from 192.168.100.17 started
63           2013/04/17 10:10:56.343 MST     192.168.100.12 Apr 17 2013 17:10:55: %ASA-6-605005: Login permitted from 192.168.100.17/62284 to Net:192.168.100.12/https for user "cisco"
62           2013/04/17 10:10:52.733 MST     192.168.100.12 Apr 17 2013 17:10:51: %ASA-6-302013: Built inbound TCP connection 11283684 for Net:192.168.100.17/62285 (192.168.100.17/62285) to identity:192.168.100.12/443 (192.168.100.12/443)
61           2013/04/17 10:10:52.718 MST     192.168.100.12 Apr 17 2013 17:10:51: %ASA-6-302013: Built inbound TCP connection 11283681 for Net:192.168.100.17/62284 (192.168.100.17/62284) to identity:192.168.100.12/443 (192.168.100.12/443)
60           2013/04/17 10:10:52.515 MST     192.168.100.12 Apr 17 2013 17:10:51: %ASA-6-106015: Deny TCP (no connection) from 192.168.100.17/62283 to 192.168.100.12/443 flags FIN ACK on interface Net
59           2013/04/17 10:10:52.515 MST     192.168.100.12 Apr 17 2013 17:10:51: %ASA-6-302014: Teardown TCP connection 11283636 for Net:192.168.100.17/62283 to identity:192.168.100.12/443 duration 0:00:02 bytes 806 TCP Reset-O
58           2013/04/17 10:10:52.515 MST     192.168.100.12 Apr 17 2013 17:10:51: %ASA-6-605005: Login permitted from 192.168.100.17/62283 to Net:192.168.100.12/https for user "cisco"
57           2013/04/17 10:10:52.358 MST     192.168.100.12 Apr 17 2013 17:10:51: %ASA-6-606003: ASDM logging session number 0 from 192.168.100.17 started
56           2013/04/17 10:10:52.358 MST     192.168.100.12 Apr 17 2013 17:10:51: %ASA-6-605005: Login permitted from 192.168.100.17/62282 to Net:192.168.100.12/https for user "cisco"
55           2013/04/17 10:10:50.374 MST     192.168.100.12 Apr 17 2013 17:10:49: %ASA-6-302013: Built inbound TCP connection 11283636 for Net:192.168.100.17/62283 (192.168.100.17/62283) to identity:192.168.100.12/443 (192.168.100.12/443)
54           2013/04/17 10:10:50.140 MST     192.168.100.12 Apr 17 2013 17:10:49: %ASA-6-302013: Built inbound TCP connection 11283629 for Net:192.168.100.17/62282 (192.168.100.17/62282) to identity:192.168.100.12/443 (192.168.100.12/443)
53           2013/04/17 10:10:50.108 MST     192.168.100.12 Apr 17 2013 17:10:49: %ASA-6-106015: Deny TCP (no connection) from 192.168.100.17/62281 to 192.168.100.12/443 flags FIN ACK on interface Net
52           2013/04/17 10:10:50.108 MST     192.168.100.12 Apr 17 2013 17:10:49: %ASA-6-302014: Teardown TCP connection 11283529 for Net:192.168.100.17/62281 to identity:192.168.100.12/443 duration 0:00:02 bytes 3107 TCP Reset-O
51           2013/04/17 10:10:49.937 MST     192.168.100.12 Apr 17 2013 17:10:49: %ASA-6-605005: Login permitted from 192.168.100.17/62281 to Net:192.168.100.12/https for user "cisco"
50           2013/04/17 10:10:47.640 MST     192.168.100.12 Apr 17 2013 17:10:46: %ASA-6-302013: Built inbound TCP connection 11283529 for Net:192.168.100.17/62281 (192.168.100.17/62281) to identity:192.168.100.12/443 (192.168.100.12/443)
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Product Name and Number:
HP Pavilion Dv9700
s/n [Personal Information Removed]
p/n FE395UA#ABA
Operating System:
Windows Vista 64bit
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When I open my Device Manager there is an /!\ next to NVIDIA nforce 10/100 Mbps Ethernet.
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Hi,
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Regards,
DP-K
****Click the White thumb to say thanks****
****Please mark Accept As Solution if it solves your problem****
****I don't work for HP****
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https://sites.google.com/site/lapastenague/a-deconstruction-of-routers-and-modem s/apple-time-capsule-repair/new-issue-with-a1355-gen-3-tc
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ASA interface utilsation peaks to 100 Mbps

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