[03:02] <alex__> hey anyone can help?
[18:36] <davygravy> looking for someone who knows network ARP & ICMP issues to assist w/ a small script I want to write...
[18:39] <CharlesA> checking to see if a host is up davygravy ?
[18:40] <davygravy> I've got an NAS device that has a netconsole-enabled bootloader.  Device needs to be able to ping a host @ IP aaa.bbb.ccc.ddd for the bootloader to autoload the kernel.
[18:40] <CharlesA> that sounds like a pain
[18:40] <davygravy> the IP is reserved, and the machine that it belongs to needs to be off frequently
[18:40] <CharlesA> hrm
[18:41] <CharlesA> I was going to suggest just pinging the default gateway and leaving it at that
[18:41] <CharlesA> Is the ip it needs to ping hard coded?
[18:42] <davygravy> yes, the IP is hardcoded in the bootloader
[18:42] <CharlesA> figures lol
[18:42] <davygravy> cant be gateway
[18:42] <davygravy> so I want to script that I can run on my router to listen for the request, and then spoof back response
[18:43] <davygravy> I know the ip of the bootloader,  192.168.11.150
[18:44] <davygravy> I can just listen for that, and when the router hears it, ping back w/ a spoofed ip.  
[18:44] <davygravy> btw this is LAN only, not WAN
[18:45] <davygravy> which util should I use?  arping?
[18:45] <CharlesA> That's a bit out of my area of expertise. =/ I'd probably just be lazy and use wake on lan from the router to wake up the target PC so the NAS loads, but that's a nasty hack
[18:46]  * davygravy wonders if there is a utility that can __listen___  for a packet from a specific IP addy
[18:48] <CharlesA> might be.
[18:48] <davygravy> hmm... the WOL is not a bad idea, though.  The original idea of ping from the bootloader was to signal a tftp server to send the NAS an initrd, in case of hard drive failure
[18:49] <CharlesA> That makes sense in case of hard drive failure, but I really have no idea how hard/easy it would be to implement
[18:50] <davygravy> CharlesA, is there a network-centric channel for Ubuntu?
[18:51] <CharlesA> davygravy: Not that I know of
[18:51] <CharlesA> Are you a member of the forums?
[18:51] <davygravy> yup!
[18:51] <CharlesA> Might try posting in Server platforms or programming talk
[18:52] <davygravy> yes, good idea, thank you, that'll do....
[18:52] <CharlesA> :)
[18:52] <davygravy> just verbalizing it has crystallized the requirements a bit better for me ...
[18:52] <CharlesA> That's a good thing.
[18:53] <CharlesA> Sometimes it's hard to explain what you want to accomplish
[18:53] <davygravy> I could even set the tftp server on the router, that might be easiest... can change the server addy on the NAS by going into its NVRAM
[18:53] <CharlesA> Something like that.
[18:54] <CharlesA> Figure it would be easier to deal with if it was set to ping a machine that was always on
[18:55] <davygravy> yes, it was set up to ping the "dev box", my powerhungry quadcore tower...
[18:55] <CharlesA> mmmm power
[18:55] <davygravy> not very green when it come to electrical consumption
[18:55] <CharlesA> I bet. I've got a dual core server set up that's set up as my NAS, probably not that green either, but it isn't as bad as a quad core
[18:56] <davygravy> the NAS only draws about 20Watts, the quadcore has a 700W PSU
[18:57] <CharlesA> Not bad at all.
[18:57] <davygravy> I'm guessing the router will only draw 10 or 15
[18:57] <CharlesA> Probably.
[18:57] <CharlesA> What router are you running?
[18:57] <davygravy> RT-N16, Asus, TomatoUSB 2.6 kernel, with optware
[18:58] <CharlesA> sounds.. beefy
[18:58] <CharlesA> I'm running a Dlink DIR-615 with DD-WRT
[18:59] <davygravy> 615, need to look that up... dd-wrt is very good
[18:59] <Bachstelze> I'm running a Soekris 4501 with OpenBSD <3
[18:59] <CharlesA> it's a crappy Wireless N router, 10/100 switch on it, cheap :P
[19:00] <CharlesA> Bachstelze: Standalone box?
[19:01] <Bachstelze> CharlesA: aye
[19:01] <CharlesA> Sounds like a nice set up
[19:01] <Bachstelze> http://soekris.com/net4501.htm
[19:01] <Bachstelze> those boxes are lovely
[19:02] <Bachstelze> I have another one that I use to experiment with embedded stuff
[19:02] <CharlesA> wow. those are nice
[19:03] <CharlesA> would make a great low power router, that's for sure.
[19:04]  * davygravy hears "embedded", smiles
[19:04] <davygravy> yes, build your own is alway the most fun
[19:05] <CharlesA> Yep.
[19:06]  * davygravy used OpenEmbedded, Buildroot, various other toolchain...
[19:06] <davygravy> foonas.org, too
[19:09]  * davygravy extends a "thank you" handshake toward CharlesA, waves goodbye to him & Bachstelze ...  off the the Ubuntu Server irc channel
[19:09] <CharlesA> good luck
[19:10] <davygravy> ;)
[19:10] <Bachstelze> you know, you don't have to leave a channel to join another one ;
[20:29] <CharlesA> ttfn