[Cialug] Slightly OT- Windows Mobile grabbing random IPs..

Tue May 8 09:58:02 CDT 2007

I've checked the MAC->Device associations on the DHCP server. I've also restarted it. The devices are certinly set for DHCP - I've already checked. No other clients are having this issue.

Anyway, I'm going to put a packet sniffer between the APs and the network (there are 4 APs in the building) so we can see what is happening.

BTW, the vendor of the software on the PDAs said that the issue was with the access point handing out DHCP incorrectly.. Ugh. All of the APs are WAP54G's....

Jonathan Bailey
Webmaster, Marshall County, Iowa
E: jbailey at co.marshall.ia.us
A: 1 E Main St, Marshalltown, IA 50158
P: 641-844-2804
C: 515-988-1021

----- Original Message -----
From: "Dave J. Hala Jr." <dave at 58ghz.net>
To: "Central Iowa Linux Users Group" <cialug at cialug.org>
Sent: Tuesday, May 8, 2007 9:46:59 AM (GMT-0600) America/Chicago
Subject: Re: [Cialug] Slightly OT- Windows Mobile grabbing random IPs..

If its a random occurence, some one could have a machine on the network
that has dhcp enabled. You could also have someone plugging in an
unauthorized wifi router into network. (this happens more than you'd
think)

:) Dave

On Tue, 2007-05-08 at 09:15, Jonathan C. Bailey wrote:
> Ok.. I haven't gone to do packet sniffing yet, but .9 is the DHCP server - .2 isn't (it's SQL and file sharing on Win2k). .2 is reserved in DHCP with a phony MAC for the win2k box. Same with .9 for the DHCP server, etc. When I look at the logs for the DHCP server, I see it handing out the correct address every time to the PDA. The only other odd thing is that this happens at random with the PDAs.
> 
> Jonathan Bailey
> Webmaster, Marshall County, Iowa
> E: jbailey at co.marshall.ia.us
> A: 1 E Main St, Marshalltown, IA 50158
> P: 641-844-2804
> C: 515-988-1021
> 
> ----- Original Message -----
> From: "Jerry Heiselman" <jweida at gmail.com>
> To: "Central Iowa Linux Users Group" <cialug at cialug.org>
> Sent: Tuesday, May 8, 2007 9:06:24 AM (GMT-0600) America/Chicago
> Subject: Re: [Cialug] Slightly OT- Windows Mobile grabbing random IPs..
> 
> On 5/8/07, Jonathan C. Bailey <jbailey at co.marshall.ia.us> wrote:
> It's slightly OT, but here goes... We have a set of 3 Windows Mobile
> PDAs (iPaqs - don't know which model) that will send a DHCP request,
> get a response, and then decide on an IP of their choosing randomly.
> The DHCP server runs on .9, the IP they commonly choose (another
> server) is on .2 and the PDAs are "statically assigned" via DHCP to
> .138, .139, and .221. The issue isn't just with the .221 PDA, but with
> all 3 - anyone else see this before? The DHCP server is just a Debian
> box and nothing special.
> >
> > Jonathan Bailey
> > Webmaster, Marshall County, Iowa
> > E: jbailey at co.marshall.ia.us
> > A: 1 E Main St, Marshalltown, IA 50158
> > P: 641-844-2804
> > C: 515-988-1021
> >
> > _______________________________________________
> > Cialug mailing list
> > Cialug at cialug.org
> > http://cialug.org/mailman/listinfo/cialug
> >
> 
> I think I'm missing something.  They are grabbing IPs from the wrong
> DHCP server or they are grabbing random IPs from the reserved pool?
> 
> If they are getting IPs from the wrong DHCP server, then they are just
> going with which ever server responded first to their DHCP DISCOVER
> packet.  If they are grabbing a random IP from their reserved pool,
> then I don't understand what the problem is.  That sounds like what
> they are suppose to do.
> 
> --
> Jerry H
> jweida [-at-] gmail [-dot-] com
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> Cialug mailing list
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> http://cialug.org/mailman/listinfo/cialug
> 
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