>
>I keep getting this following error with my XP Pro w/ SP2. I keep
>losing the internet. When I disconnect the Belkin router, I don't lose
>the internet. I have the lastest & greasted updated firmware. I am
>"hardwired" to the router as I thought that maybe the wireless card was
>the issue.
>
>Thanks for your ideas.
>
>*** system event log***
>
>The IP address lease 192.168.2.2 for the Network Card with network
>address 00023F78FD9D has been denied by the DHCP server 192.168.2.1
>(The DHCP Server sent a DHCPNACK message).

> On 13 Mar 2005 07:00:30 -0800, cyberstar***@hotmail.com wrote:
>
> >
> >I keep getting this following error with my XP Pro w/ SP2. I keep
> >losing the internet. When I disconnect the Belkin router, I don't
lose
> >the internet. I have the lastest & greasted updated firmware. I am
> >"hardwired" to the router as I thought that maybe the wireless card
was
> >the issue.
> >
> >Thanks for your ideas.
> >
> >*** system event log***
> >
> >The IP address lease 192.168.2.2 for the Network Card with network
> >address 00023F78FD9D has been denied by the DHCP server 192.168.2.1
> >(The DHCP Server sent a DHCPNACK message).
>
> The message means that your XP Pro SP2 client has requested a DHCP
> lease renewal, and the access point has denied it.  Usually, DHCP
> lease renewal requests are initiated by the client at about half the
> lease time.  Run:
>   ipconfig /all | more
> and see if it discloses the lease time.  You can force an early
> renewal with:
>   ipconfig /renew
> and watch for errors in the event viewer.  DHCP renewals are also
> initiated by XP after the connection has been lost for some time.  (I
> don't know how long).  The idea is to check if the DHCP server hasn't
> timed out and delivered the IP address to some other client computah.

>
> I've also seen the event log full of DHCPNACK messages when someone
is
> trying to hijack my connection using MAC address spoofing.  It can
> also happen if someone has changed your XP SP2 box's MAC address to
> duplicate another machine on the network.  XP uses the MAC address in
> the registry, not directly from the card.  Run:
>   arp -a
> and proporties for your ethernet card to see if any MAC addresses are
> off.  This is especially common for machines that have been cloned
> from a common system image, where the MAC address in the registry is
> duplicated in the cloned machines.
>
> You might wanna try temporarily setting your XP box to a fixed IP
> address and see if the disconnect problem is specific to the DHCP
part
> of the puzzle.  I'll guess(tm) that you'll still get disconnects.
>
>
> --
> Jeff Liebermann    je***@comix.santa-cruz.ca.us
> 150 Felker St #D   http://www.LearnByDestroying.com
> Santa Cruz CA 95060    AE6KS  831-336-2558

>
> >Both my neighbor and I live in a rural area and have what the ISP is
> >calling "wireless DSL." We both have the Belkin routers. He did have
a
> >Netgear and they switched him out. His "disconnect" is more often
than
> >mine.
>
> Holdit!  "Wireless DSL" is probably a WISP (wireless ISP).  If
they're
> also using 2.4GHz, you have a built in local source of interference.
> There's you're problem.  It doesn't take much junk on the same
channel
> to cause a disconnect.  I'm not sure how the DHCP failure is related
> to the disconnects, but it's worth investigating.  Turn OFF the
> Wireless DSL box and run some local wireless traffic between
machines.
> See if the DHCP errors magically go away.

>
> Post a URL to these guys and I'll see if I can figure out what
they're
> doing.  If they're using 802.11b/g, just find an unused channel (1,
6,
> or 11).  If they're using frequency hopping or some proprietary
> modulation scheme, you'll probably need to switch bands to 802.11a.
> >Since we're so far out, I doubt that someone is hacking, but one can
> >never tell.
>
> Every 15 year old in the neighborhood with a wireless device has
tried
> to hack my system.  I think it's now a teenage right of passage or
> something.  Even the girls do it.  When I was operating a BBS and
> later a UUCP gateway in my office, it seemed that the local high
skool
> electronics class was using my system as a test exam in computer
> breaking and entry.  I really learned about security from those kids.

>
> --
> Jeff Liebermann    je***@comix.santa-cruz.ca.us
> 150 Felker St #D   http://www.LearnByDestroying.com
> Santa Cruz CA 95060    AE6KS  831-336-2558

> >Well there aren't any kids out here yet. All three are under 5 and
the
> >rest are  Lamas, horses, cows, and coyotes. Really, they'd have to
part
> >in the driveway to get a good signal with my low powered "g/b"
router;
> >at least that's my opinion even with a directional yagi.
>
> Well, I'm out of great ideas on this one.  It's tempting to suggest
> that there's something wrong with your Belkin F5D7230-4.  I have an
> earlier model that I didn't work very well.  I've also had rather bad
> luck with some (not all) Belkin products.  If you can borrow a
> suitable replacement and see if it makes a difference, it might help
> assign the blame.

> Look for 5 year old carrying what looks like a large barbeque grill.
>
>
> --
> Jeff Liebermann    je***@comix.santa-cruz.ca.us
> 150 Felker St #D   http://www.LearnByDestroying.com
> Santa Cruz CA 95060    AE6KS  831-336-2558

news:1111092542.899260.26550@z14g2000cwz.googlegroups.com...
>
> Jeff Liebermann wrote:
>> On 17 Mar 2005 05:51:27 -0800, cyberstar***@hotmail.com wrote:
>>
>> >The ISP's modem is a propriatary WAVERIDER something or other at 900
>> >mHz, so I'm told. Hey it works and all we have out here is a gravel
>> >quarry and LOTS of dairies (along with the warm summer smell).
>>
>> I'll trade you any time for fixing machinery wireless links and
>> computahs in the King City, CA garlic fields during harvest time.
>> Somehow, I always seem to get stuck downwind of the smell.
>
> My sister live by Gilroy, and I would trade that for the smell of
> ammonia anytime. :)
>
>>
>> Waverider is good hardware and their 900MHz should have no effect on
>> your 2.4Ghz hardware.  So much for that theory/guess.  No notch in my
>> keyboard this time.
>
> Yea, the only thing I don't like is port 23 is kept open, hopefully my
> ZAlarm firewall is doing it's job.
>
>
>> >Well there aren't any kids out here yet. All three are under 5 and
> the
>> >rest are  Lamas, horses, cows, and coyotes. Really, they'd have to
> part
>> >in the driveway to get a good signal with my low powered "g/b"
> router;
>> >at least that's my opinion even with a directional yagi.
>>
>> Well, I'm out of great ideas on this one.  It's tempting to suggest
>> that there's something wrong with your Belkin F5D7230-4.  I have an
>> earlier model that I didn't work very well.  I've also had rather bad
>> luck with some (not all) Belkin products.  If you can borrow a
>> suitable replacement and see if it makes a difference, it might help
>> assign the blame.
>
> Belkin, the price was right. With rebates, we'll see if they come back,
> it was only 20 bucks from Comp(ripoff)USA.
>
>
>
>> Incidentally, it's easy to guess how far one could use wireless if
> you
>> know the antenna gain.  Assume a laptop has 0dB antenna gain and you
>> can make it to the driveway, about 20meters.  If I added 6dBi gain to
>> the laptop antenna, and changed nothing else, I could go twice as
> far.
>> Range doubles for every 6dBi of antenna gain.  12dBi gain will get me
>> 4 times as far.  18dBi will be 8 times as far.  24dBi will go 16
> times
>> as far.  With large 24dBi dish, that's 320meters range changing
>> nothing other than the antenna.  This is overly simplified as it
>> doesn't include coax and connector losses, but it close enough for
>> estimates.
>
> That's good. Easy for my simple brain to understand. When I use
> netstumbler, I get negative numbers. How can one have a negative dB
> reading? If you're transmitting, isn't that a signal in positive
> mWatts?
>
>> Look for 5 year old carrying what looks like a large barbeque grill.
>>
>>
>> --
>> Jeff Liebermann    je***@comix.santa-cruz.ca.us
>> 150 Felker St #D   http://www.LearnByDestroying.com
>> Santa Cruz CA 95060    AE6KS  831-336-2558
>

"Jeff Liebermann" <je***@comix.santa-cruz.ca.us> wrote in message
news:opek315o46ivuphc7b8mopj2mp7kcfn6nc@4ax.com...
> On Fri, 18 Mar 2005 01:07:13 GMT, "DLink Guru"
> <rjacobs0spamfree@pacbell.net> wrote:
>
>>Hey, I live in Gilroy, and I love the smell, especially during the picking
>>season.
>
> Well, at least you don't have to worry about evil spirits haunting
> your wireless systems.  From:
>  http://www.zerotime.com/night/destroy.htm
>
>  Garlic: Garlic is another ancient method of fending off evil
>  spirits. Garlic has been used in cultures throughout the world
>  as a healing medicine and natural vitamin. It was thought to
>  have a purification principle much like the metal Silver. People
>  would hang it outside their doorways to keep evil spirits from
>  entering their homes. The ancient societies got a little carried
>  away with Garlic condemning anyone who had an aversion to garlic
>  as a vampire. Garlic was also passed out during church ceremonies
>  so that church official could be sure that no evil spirits were
>  attending.
>
> Pehaps if I hang a clove on my antenna, it will keep evil interference
> away.
>
>
> --
> # Jeff Liebermann 150 Felker St #D Santa Cruz CA 95060
> # 831.336.2558 voice  http://www.LearnByDestroying.com
> #                         je***@comix.santa-cruz.ca.us
> #                           je***@cruzio.com     AE6KS

> >That's good. Easy for my simple brain to understand. When I use
> >netstumbler, I get negative numbers. How can one have a negative dB
> >reading? If you're transmitting, isn't that a signal in positive
> >mWatts?
>
> Nope.  The "m" in dBm is "milliwatt".  The numbers you're seeing are
> releative to 1.0 milliwatts or 0dBm.  If you were talking about power
> output from a transmitter, then it would be decibels above 1
> milliwatt.  For example, 100 milliwatts is 100 times more than 1
> milliwatt.  So, the math is:
>   dBm = 10 * log (ratio)
>   dBm = 10 * log (100) = +20dBm
>
> However, receive signals are usually less than 1 milliwatt, the ratio
> becames a fraction, and therefore the dBm values are negative.  If
the
> receiver hears a signal at 100 microwatts [1], then that's 1/1000th
of
> the 1 milliwatt signal or:
>   dBm = 10 * log (ratio)
>   dBm = 10 * log (1/1000) = -30dBm
>
> [1] Receive signal is usually not described in microwatts but is
> either converted to dBm as above or expressed in microvolts across a
> 50 ohm load:
>   100E-6 watts = (Voltage)^2 / 50 ohms
>   100E-6 = E^2 / 50
>   E = 0.7E^-3 = 700 microvolts.