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windows file sharing bandwidth usage

Hi there,
I have windows server 2008 ent edition domain with win 7 clients.  From time to time I check on the usage of my wireless network, the top bandwidth is consumed by 'Windows file sharing' (in gigs of data).  The description of this usage is 'Windows file sharing, TCP over port 137, 138 and 445'.  Why is so much bandwidth is alone consumed everyday by this file sharing.  I am sure my clients and server share the shared folders, but not that much of usage everyday.  
One article on the internet was mentioning to disable 'NETBIOS over TCP/IP from all the NICs of the file sharing servers' (not sure if this would help.  I would like my clients to atleast see the shared foldres on my servers but at the same time I would want my least amount of bandwidth used over the wireless nodes.  
Help please.  What and how this situation can be tackled?
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amanzoor
Asked:
amanzoor
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1 Solution
 
Nagendra Pratap SinghCommented:
Is it your WAN bandwidth or LAN?

LAN usage is normally not counted.
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amanzoorNetwork infrastructure AdminAuthor Commented:
npsingh123:
Good question.  You know I am not sure.
how do I find out if this is my Lan usage?  To me since this usage is on top of application usage and all of the rest categories pertain to net, I would assume its WAN based (but not 100% sure).  Please check the attached file and guide me.
filesharing.docx
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Nagendra Pratap SinghCommented:
First block SMB ports on router/internet firewall.

You have pulled this our of your wireless router I think.

Do you have a network diagram?
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Nagendra Pratap SinghCommented:
It it your home or office?
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amanzoorNetwork infrastructure AdminAuthor Commented:
npsingh213,
This screen shot is from my wireless AP.  It is my office.  Here is the layout diagram very simple:.

cisco 2911 router>>>>>>>Astaro firewall 320>>>>>>Brocade 6450 switch>>>>>wireless AP
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Nagendra Pratap SinghCommented:
Then it is your internal traffic.

But to be sure. You can check your ISP usage for morning. Do lots of file transfers via AP (to laptops) and check ISP usage again.

Your AP should show few GB usage but your ISP usage should be like normal days.
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