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Re: [PLUG] network hardware follies
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> Date: Sat, 15 Nov 2008 09:06:23 -0500
> From: Eric <eric@lucii.org>
>
> I'm trying to reset a Linksys RTP300 that my wife obtained for me from
> Freecycle. It is a Linux-powered VoIP router. The history of the device is
> unknown but I would presume that it's a former Vonage unit. That may be a
> totally bogus assumption, I'll admit, but where it came from is irrelevant IF I
> can get it to work.
Hopefully the URL Casey sent will help, but if not...
<snip>
> What kind of nmap scan would be the quickest and still be most likely detect the
> unit? I tried a ping scan over the home network and it takes about 40 seconds
> to scan the 192.168.15.1/24 range. At that rate the entire 192.168.1.1/16 range
> will be about 3 hours. I'm trying not to think about the 10.0.0.0/8 range.
> Okay, okay... I thought about it: 728 hours or about 1 month. I'd rather try #2
> or #3 first :-)
Yeah, nmap has a gazillion options. But port 80 pretty much has to be
there, right? So:
nmap -P0 -p 80 192.168.0.0/16
# -P0 = Do not ping (ICMP) first
# -p = Ports to scan
But before you do that, keep reading.
> Ideas and suggestions are really welcome! At this point I'm starting to run out
> of ideas and #3 is starting to look better and better :-(
Why not try to make it tell you? Install Wireshark on your machine,
then plug the cross-over cable in. Start Wireshark as root and sniff
promiscuously (I just like saying that :). Then power up the gadget and
watch Wireshark's capture. Once the gadget is up, try plugging in a
phone and trying to make a call. Surely one of those actions will make
the gadget try to send some packets someplace, and give you a clue.
Good luck,
JP
----------------------------|:::======|-------------------------------
JP Vossen, CISSP |:::======| jp{at}jpsdomain{dot}org
My Account, My Opinions |=========| http://www.jpsdomain.org/
----------------------------|=========|-------------------------------
"Microsoft Tax" = the additional hardware & yearly fees for the add-on
software required to protect Windows from its own poorly designed and
implemented self, while the overhead incidentally flattens Moore's Law.
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