04-23-2008 07:07 AM - edited 03-11-2019 05:35 AM
I have a Cisco 2621 running IOS version
c2600-ik9o3s3-mz.123-24a.bin
The setup is a very simple one. I have
a Windows XP sitting behind the Cisco 2621.
On the Windows XP, I run Emule and Bit
Torrent on the WinXP box. After about
an hour, the Cisco 2621 freezed up and
became un-responsive. The only solution
is to manually turn OFF/ON the power
button on the 2621 router.
Here is my configuration on the router:
interface F0/0
ip address 4.2.2.2 255.255.255.248
speed 100
dup full
ip nat outside
interface F0/1
ip address 192.168.1.1 255.255.255.0
speed 100
duplex full
ip nat inside
access-list 100 permit ip 192.168.1.0 0.0.0.255 any
ip nat inside source list 100 interface F0/0 overload
I have a 30Mbps download and 5Mbps upload. When the router is running
the # of NAT translation is about 200 and
the throughput is about 5Mbps download and 2Mbps upload.
What could be the issue that makes the router locked up after an hour. If I
stop emule and bit torrent, the router
can stay up and running for days without
issues.
Last but not least, if I replace the
Cisco 2621 with a Checkpoint NGx R65
Secureplatform firewall, I have no such issue.
When the rourer is up and running with
emule and bit torrent prior to locking up, cpu is about 40% and memory is about
75% utilization.
Any ideas anyone? Thanks.
04-29-2008 08:49 AM
You can create an ACL on the router to block P2P ports such as 6881 (Bittorrent). Following link may help you
You can use NBAR within IOS to block bittorrent. Here's an example of how to do it:
http://slaptijack.com/networking/controlling-peer-to-peer-p2p-traffic-with-cisco-nbar/
04-29-2008 08:54 AM
I do NOT want to block Bittorrent or Emule. I
want to allow Bittorrent. I just do not want
Bittorrent or Emule to freeze up the router.
I do not have this issue with Checkpoint
firewall NGx R65. With IOS router, the router
locks up.
Any ideas on how to fix this?
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