snort-users May 2009 archive
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snort-users: Re: [Snort-users] VRT Rules snapshot-CURRENT.tar.gz

Re: [Snort-users] VRT Rules snapshot-CURRENT.tar.gz Download Error?

From: Joel Esler <jesler_at_nospam>
Date: Fri May 29 2009 - 16:35:11 GMT
To: jlay@slave-tothe-box.net


On Fri, May 29, 2009 at 12:12 PM, <jlay@slave-tothe-box.net> wrote:

> > I spoke to our IT guys - sorry, This isn't possible.
> >
> > I also want to thank everyone for the great feedback so far.
> >
> > On Thu, May 28, 2009 at 5:49 PM, Sethsec <sethsec@gmail.com> wrote:
> >
> >> It looks like you guys are redirecting the initial request to
> >> www.snort.org
> >> to dl.snort.org. Is there anyway you can do that redirection "behind
> >> the scenes" do I don't have to add the .34 to a butt load of outgoing
> >> fw rules?
> >>
>
> My question now is, what's the best timeframe for updating rules? I have
> a script that downloads the rules once a week (via oinkmaster)...should I
> change that to something different? Is there a way to diff the rules or
> tarball on a box and compare to what's online before downloading? How can
> end users lighten the load on the snort.org site? Just a few questions I
> guess.
>
>

Good questions, and I hope everyone is paying attention to this thread so we can lighten the load.

I personally have a system that only runs when I get the rule email from the VRT. I run it manually. I have just automated my scripts to run, download the rules, create a new sid-msg.map file with my custom rules in it, restart barnyard and restart Snort. Rule releases come out about every two weeks or so, depending upon the threats on the internet that the VRT has to cover. I think once a week is a fine frequency for keeping it automated. Depending upon your environment, VRT releases rules to cover Microsoft vulnerabilities on Patch Tuesday (Second Tuesday of every month), so shortly after this rule release might be a good idea.

It's the once a minute, or once every 15 minute people we have to be concerned about. Once a day is fine, but in reality, rules aren't going to be released that often. I think once a week is a good frequency. -- joel esler | Sourcefire | gtalk: jesler@sourcefire.com | 302-223-5974

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