router 871W

I have router 871W connect to local ISP  I want to know if it's possible to monitor the traffic
going out from the Router and stop some application from working like torrent .

I need detail about the Solution  if it's possible

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dan_blagutConnect With a Mentor Commented:

If your router is connected using an standard network cable you can use an switch and the port mirroring facility to copy the output to another machine. That will allow you to use wireshark or another application to analyse the trafic.

Not the easiest task you have selected, but this is an article.

For monitoring, there's several options, You can setup an NTop server and export flow data from the router to it. (
Blocking, you'll have to create an ACL and block what you don't want.  For your example, stopping torrents would be difficult as it can run over any port.  Your best bet is to get a firewall that can do deep packet inspection, like an ASA.  Then you can do something like this:
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salmaaloufAuthor Commented:
I install the ISO version :
Cisco IOS Software, C870 Software (C870-ADVSECURITYK9-M), Version 12.3(8)YI2, RELEASE SOFTWARE (fc1)
Synched to technology version 12.3(10.3)T2
Technical Support:
Copyright (c) 1986-2005 by Cisco Systems, Inc.
Compiled Tue 14-Jun-05 18:58 by ealyon

now I have the option for Application Security but it's not available for Torrents:
I need the advice from the expert in this filed .
what I shoudl do  ?????

Jan SpringerCommented:
If your CPU can handle it and your IOS supports it, you can view NBAR traffic and/or completely block it:
I have not done it before with NBAR, but I found an article that desribes what you're trying to do on this platform.  Let me know how this works for you:
I'll have to echo what they say at the begining, if they enable encryption on their torrent client, all bets are off.  Then you'll really need something that does deep packet inspection, like an ASA or similar firewall device.
salmaaloufAuthor Commented:
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