Windows updates are maxing our bandwidth – how do I stop it?

our bandwidth is being being maxed out for about 17 hours now, but what seems to be Windows updates.  How can I stop this?
XetroximynAsked:
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Alan_WhiteCommented:
Do you have multiple PCs in a site and each one is checking for updates directly from Microsoft update?

If so, you need to investigate WSUS: http://technet.microsoft.com/en-us/windowsserver/bb332157

With WSUS, your WSUS server downloads appropriate updates once and your clients get them from that server.

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XetroximynAuthor Commented:
that seems to be the case.  We've never had a problem like this before though.  

We have a domain server, and probably 30 or 40 PCs on that domain.

But then we also have another 200 PCs that are not on the domain.  (we are a call center in their interviewer PCs, and they are only used the telnet, so we don't want to pay for the CALs for all of them)

Can WSUS be used an environment like this, even for the PCs that are not on the domain?

And perhaps more importantly for the time being, is there a way I can stop the current flood, so we can at least get back to operating like normal?
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David Johnson, CD, MVPOwnerCommented:
non domain pc's will not use your bandwidth, let them get their own updates.
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Alan_WhiteCommented:
I believe that you can have a non-Domain PC recieving updates from a WSUS server.  I've never tried it myself but this article says you can: http://kudithipudi.org/2006/08/18/how-to-update-non-domain-members-using-wsus/

Regarding ve3ofa's comment, I'm not sure they are imagining your environment like I am.  I'm thinking you have an internal network that your Domain and "external" PCs are connected to, all of which are able to get to the Internet via your network via your "pipe" (ISP, broadband, WLAN link, whatever).  If I'm right then unless you can block them from getting to the internet by denying access to to a proxy or something then they WILL be using your bandwitdh.

Depending on your proxy / Internet gateway config, you might be able to block ALL access to the windows update URL, but that will prevent your internal clients getting updates too.
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XetroximynAuthor Commented:
thanks for the comments!  It turns out our contractor who thought it was Windows updates, was incorrect.  There were Windows updates going on, but apparently something has gone awry in our sonic wall.  Power cycling the sonic wall immediately caused the maxing bandwidth to go away.
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XetroximynAuthor Commented:
Thanks!
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