Re: Run an external program

["Jack Whitsitt (jofny)" <seclists () violating us>]

We're using a named pipe output-plugin for snort to pass data from snort
and to signal another process.  If you're writing to a FIFO, snort doesnt
block while waiting for the listening process to read in data. I haven't
used it in a fully-used 100Mbit pipe yet, but it shouldn't take more of a
performance hit than writing a log to MySQL or alerting elsewhere. If you
have a listening client already loaded in memory, it can act directly on
the signals without spending time loading and reinitializing. It also is a
bit faster than constantly checking logs to see if they've changed.
-Jack

> 2003-03-05T09:39:50 Erek Adams:
> > I'd honestly suggest moving to a *NIX platform and alerting to
> > a socket.
>
> That would worry me; wouldn't snort block on writes when the reader is
> off executing some program?
>
> Rather than using IPC to let swatch feed the program-executer
> directly, go by way of a logfile; if the program-executer doesn't
> always keep up (if it falls behind when it's running the external
> program) that's fine, the logfile provides intrinsic buffering.
>
> -Bennett





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