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 From:  sai <list at ebs dot net dot pk>
 To:  "Andrew \"Silver Blade\" Greenwood" <lists at silverblade dot co dot uk>
 Cc:  m0n0wall at lists dot m0n0 dot ch
 Subject:  Re: [m0n0wall] Hacking together some custom extensions
 Date:  Sat, 30 Oct 2004 11:41:37 +0500
Andrew "Silver Blade" Greenwood wrote:
> Having been tinkering around with some LEDs (changing the LEDs in my 
> router and computer), earlier today I had an idea.
> 
> My m0n0wall machine is in the attic. I'm wondering if somehow I can 
> attach a custom-built device to the serial port and run a cable down 
> here (from serial port to device) for various purposes.
> 
> The device would just consist of a few LEDs, mainly for the "pretty 
> lights" effect.
> 
> What I'd be interested in doing is ultimately developing a small 
> PIC-based system where m0n0wall sends out various information to the 
> serial port. This information instructs which LED is to turn on/off.
> 
> I thought of having an LED that goes on for a few milliseconds whenever 
> something is blocked by the firewall, and maybe another for when a 
> connection is made which is accepted. And maybe another for rejected 
> connections.
> 
> After that, maybe a few more to indicate activity on certain ports 
> (http, imap, ftp) along with ranges (bittorrent / edonkey port ranges as 
> one LED)
> 
> I'm wondering how I'd go about adding such a thing to m0n0wall. I'd have 
> to code it myself, I understand that. But how???
> 
> And how would my program get notified that a connection had been made / 
> data is flowing on a certain port?
> 
> I also considered just using a network-based thing for this, but it's 
> not really valuable traffic and although its small, it might lag out a 
> bit as packets are bundled.
> 
> Strange questions, I know. But I want to make a gadget :)
> 

:-)

I like the idea of the LED that lights up when something is blocked ! I 
know it would give me a good feeling.

sai