[Snort-sigs] Create a rule that takes its content from a file.

Joel Esler jesler at ...435...
Tue May 14 12:40:37 EDT 2013

I am not sure what you mean by "takes it's content from a file"

Joel Esler
Senior Research Engineer, VRT
OpenSource Community Manager

On May 14, 2013, at 9:07 AM, arneu sneu <arneu99 at ...12...> wrote:

> Hi,
> I just installed Snort a few days ago and started to play with it by writing my own rules.
> I would like my rule to take its content from a file, but I haven't find any information on this topic, neither in the manual, nor on the Internet. I found that the content-list keyword once existed in Snort, but it has apparently been removed about 6 years ago. Too bad, because it was exactly what I was looking for.
> Would anybody have an idea on how to do such a thing with current snort features? I could write a rule for each of the lines of my file or use pcre with the list of possible values, but I was wondering if there was a way to do it with a rule taking its content from a file. If not, what is the correct approach to do this?
> As an example, if I have a file containing a whitelist of file extensions, I would like to raise an alert when an email attachment having an extension that is not in the list is seen in the network traffic.
> Many thanks for your help.
> Cheers
> Arneu
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