Cannot get IP address from Router DHCP

  • Thread starter Thread starter Efren
  • Start date Start date
E

Efren

Hi,
I set a Home Network a few months ago consisting of a wired desktop
connected through a D-Link NIC, a wireless Dell laptop using its
TrueMobile G card and another wireless desktop connected through a USB
G linksys adapter and using a Linksys WRT54G Router. Everything worked
fine until two days ago when the wired desktop suddenly stopped
connecting to the network and to the internet. I did not install
anything new nor made any changes to the network configuration. The LED
on the router and the NIC were green suggesting connection but the
desktop got an autoconfigured IP address instead of the assigned by the
DHCP on the router and I could not ping the router or any of the
computers on the network (they were on a differente subnet mask).
Since this strange phenomenon happened I had tried:

* Assigned an static IP address to the wired desktop; now it can
access the network and ping other computers on it but I can't ping
yahoo.com or access the internet from this computer. The wireless have
no problem at all accesing both services. Now, a strange thing is that
I can ping the router but I cannot get to its web based utility by
typing its address either on Firefox o IE6. I can do this from the
wireless laptop without a problem.
* Disabled the wireless card on the Laptop and wired it directly to
the router. It can connect to the router, the network and internet.
* Bought a new NIC, now a Linksys Network Everywhere (hoping for
compatibility with the router) and cable and installed it on the wired
computer. Same problem: autoconfigured address and no access.
* Did a hard reset on the Motorola Cable Modem and on the router
and reconfigured manually the options. No luck either.
* Disabled and then unistalled ZoneAlarm to test connections. Still
no internet access. I have now reinstalled it and accessing the network
through a static IP but I cannot connect to the internet.

So far it does not seem to be related to the router, the cable or the
NIC card on the wired desktop so I am thinking of a software setting. I
have run out of ideas of things to try and hope you can help. The wired
desktop is running W2K Professional and the others XP SP2. The wireless
network is running with WEP but I have no problem in the wireless
section of my network, it's the wired the problem.

Thanks for your interest in helping me,
Efren
 
Inline....

In
Efren said:
Hi,
I set a Home Network a few months ago consisting of a wired desktop
connected through a D-Link NIC, a wireless Dell laptop using its
TrueMobile G card and another wireless desktop connected through a USB
G linksys adapter and using a Linksys WRT54G Router. Everything worked
fine until two days ago when the wired desktop suddenly stopped
connecting to the network and to the internet. I did not install
anything new nor made any changes to the network configuration. The
LED on the router and the NIC were green suggesting connection but the
desktop got an autoconfigured IP address instead of the assigned by
the DHCP on the router and I could not ping the router or any of the
computers on the network (they were on a differente subnet mask).
Since this strange phenomenon happened I had tried:

* Assigned an static IP address to the wired desktop; now it can
access the network and ping other computers on it but I can't ping
yahoo.com or access the internet from this computer.
Click to expand...

Can you ping your DNS server?
What DNS server did you assign? Use your ISP's.
The wireless have
no problem at all accesing both services.
Click to expand...


Run ipconfig /all in a command line on each computer & compare them. You can
use ipconfig /all >c:\myip.txt to pipe the output to a text file to make
this easier.
Now, a strange thing is that
I can ping the router but I cannot get to its web based utility by
typing its address either on Firefox o IE6. I can do this from the
wireless laptop without a problem.
Click to expand...

Address = IP address?
* Disabled the wireless card on the Laptop and wired it directly to
the router. It can connect to the router, the network and internet.
* Bought a new NIC, now a Linksys Network Everywhere (hoping for
compatibility with the router) and cable and installed it on the wired
computer. Same problem: autoconfigured address and no access.
Click to expand...

Did you try a different patch cable? Different port on the hub/switch?
* Did a hard reset on the Motorola Cable Modem and on the router
and reconfigured manually the options. No luck either.
* Disabled and then unistalled ZoneAlarm to test connections. Still
no internet access. I have now reinstalled it and accessing the
network through a static IP but I cannot connect to the internet.
Click to expand...

See above (re DNS)
 
Thanks a lot for replying,

- I can ping both the preferred and alternate DNS servers from the
wired computer and in fact I am using the ISP's servers (as you can see
in the ipconfig output for the wired desktop).

- Here are the results of the ipconfig in the wired computer that
cannot get its address from the DHCP server:

Windows 2000 IP Configuration
Host Name . . . . . . . . . . . . : Casa
Primary DNS Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Broadcast
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No

Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Network Everywhere Fast Ethernet
Adapter(NC100 v2)
Physical Address. . . . . . . . . : 00-12-17-56-2C-4D
DHCP Enabled. . . . . . . . . . . : No
IP Address. . . . . . . . . . . . : 192.168.8.10
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.8.1
DNS Servers . . . . . . . . . . . : 24.93.41.125
24.93.40.76

Now here are the results from the wireless laptop that has no problems:

Windows IP Configuration
Host Name . . . . . . . . . . . . : Portatil
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Mixed
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : REDE

Ethernet adapter Wireless Network Connection:
Connection-specific DNS Suffix . : REDE
Description . . . . . . . . . . . : Tarjeta Mini-PCI Dell
TrueMobile WLAN 1300
Physical Address. . . . . . . . . : 00-90-4B-24-1F-CD
Dhcp Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IP Address. . . . . . . . . . . . : 192.168.8.101
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.8.1
DHCP Server . . . . . . . . . . . : 192.168.8.1
DNS Servers . . . . . . . . . . . : 24.93.41.125
24.93.40.76
24.93.40.64

Ethernet adapter Local Area Connection:
Media State . . . . . . . . . . . : Media disconnected
Description . . . . . . . . . . . : Broadcom 440x 10/100
Integrated Controller
Physical Address. . . . . . . . . : 00-0B-DB-1D-CC-9A

Should DHCP be enabled on the Win2K machine as they are in the XP? if
that's the case, how do I change it? Maybe it is because I have
assigned an static IP address.

- Yes, address= IP address (sorry); you access the setup utility on the
router by typing its address on a browser but I cannot get to the
utility when I type it; however, I can ping the router from this
(wired) same machine.

- I bought a new cable and a new NIC for the computer with problems and
did try a different port; I also wired the laptop to the same (#1) port
on the router using the old cable and it works.

I really appreciate your help; thanks,
Efren


Lanwench [MVP - Exchange] ha escrito:
 
In
Efren said:
Thanks a lot for replying,

- I can ping both the preferred and alternate DNS servers from the
wired computer and in fact I am using the ISP's servers (as you can
see in the ipconfig output for the wired desktop).

- Here are the results of the ipconfig in the wired computer that
cannot get its address from the DHCP server:

Windows 2000 IP Configuration
Host Name . . . . . . . . . . . . : Casa
Primary DNS Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Broadcast
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No

Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Network Everywhere Fast Ethernet
Adapter(NC100 v2)
Physical Address. . . . . . . . . : 00-12-17-56-2C-4D
DHCP Enabled. . . . . . . . . . . : No
IP Address. . . . . . . . . . . . : 192.168.8.10
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.8.1
DNS Servers . . . . . . . . . . . : 24.93.41.125
24.93.40.76

Now here are the results from the wireless laptop that has no
problems:

Windows IP Configuration
Host Name . . . . . . . . . . . . : Portatil
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Mixed
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : REDE

Ethernet adapter Wireless Network Connection:
Connection-specific DNS Suffix . : REDE
Description . . . . . . . . . . . : Tarjeta Mini-PCI Dell
TrueMobile WLAN 1300
Physical Address. . . . . . . . . : 00-90-4B-24-1F-CD
Dhcp Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IP Address. . . . . . . . . . . . : 192.168.8.101
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.8.1
DHCP Server . . . . . . . . . . . : 192.168.8.1
DNS Servers . . . . . . . . . . . : 24.93.41.125
24.93.40.76
24.93.40.64

Ethernet adapter Local Area Connection:
Media State . . . . . . . . . . . : Media disconnected
Description . . . . . . . . . . . : Broadcom 440x 10/100
Integrated Controller
Physical Address. . . . . . . . . : 00-0B-DB-1D-CC-9A

Should DHCP be enabled on the Win2K machine as they are in the XP?
Click to expand...

Well, I would.
if
that's the case, how do I change it?
Click to expand...

In the properties of your Local Area Connection, TCP/IP....
Maybe it is because I have
assigned an static IP address.
Click to expand...

Could be (although that doesn't explain your inability to get to the
router's internal web page by IP address).
- Yes, address= IP address (sorry); you access the setup utility on
the router by typing its address on a browser but I cannot get to the
utility when I type it; however, I can ping the router from this
(wired) same machine.

- I bought a new cable and a new NIC for the computer with problems
and did try a different port; I also wired the laptop to the same
(#1) port on the router using the old cable and it works.
Click to expand...

OK, then I'm confused....it works *with* that config?
I really appreciate your help; thanks,
Efren
Click to expand...

You're welcome - hope I am indeed helping.
Lanwench [MVP - Exchange] ha escrito:
Inline....

In

Can you ping your DNS server?
What DNS server did you assign? Use your ISP's.



Run ipconfig /all in a command line on each computer & compare them.
You can use ipconfig /all >c:\myip.txt to pipe the output to a text
file to make this easier.


Address = IP address?


Did you try a different patch cable? Different port on the
hub/switch?


See above (re DNS)
Click to expand...
Click to expand...
 
In line,

Lanwench [MVP - Exchange] ha escrito:
In

Well, I would.


In the properties of your Local Area Connection, TCP/IP....
Click to expand...

Well, I went to the properties of the Local Area connection and, under
TCP/IP I have only one tab, General and there is no evident place where
I can turn on DHCP. I went to the advanced screen and can't find in any
of the tabs (IP settings, DNS, WINS and options) anything that suggest
that can activate DHCP. Where do I do this? and, what does it do? (the
DHCP server is on the router, isn't it?)
Could be (although that doesn't explain your inability to get to the
router's internal web page by IP address).

OK, then I'm confused....it works *with* that config?
Click to expand...

Actually what I tried was to test the port and the cable that went to
the wired desktop so I disabled the wireless connection on the laptop
and connected the cable that went to the desktop to the laptop and it
could connect to the network, to the setup utility of the router and to
the internet. That, I think, means that the cable and the port on the
router works.

I am puzzled at the fact that I can ping the router and the DNS server
on my ISP but I am not able to get to it's setup utility on the browser
nor to the internet. If I can ping the DNS servers on my ISP, isn't it
true that I am actually getting to the internet? If that's true, why
can't I browse it? The same is true for pinging the router. If I can
ping it, then why I cannot get it to display its setup page?
You're welcome - hope I am indeed helping.
Click to expand...

You're trying and that's great and I sincerely thank you,

Efren

Lanwench [MVP - Exchange] ha escrito:
Inline....

In Efren <[email protected]> typed:
Hi,
I set a Home Network a few months ago consisting of a wired desktop
connected through a D-Link NIC, a wireless Dell laptop using its
TrueMobile G card and another wireless desktop connected through a
USB G linksys adapter and using a Linksys WRT54G Router. Everything
worked fine until two days ago when the wired desktop suddenly
stopped connecting to the network and to the internet. I did not
install anything new nor made any changes to the network
configuration. The LED on the router and the NIC were green
suggesting connection but the desktop got an autoconfigured IP
address instead of the assigned by the DHCP on the router and I
could not ping the router or any of the computers on the network
(they were on a differente subnet mask). Since this strange
phenomenon happened I had tried:

* Assigned an static IP address to the wired desktop; now it can
access the network and ping other computers on it but I can't ping
yahoo.com or access the internet from this computer.

Can you ping your DNS server?
What DNS server did you assign? Use your ISP's.

The wireless have
no problem at all accesing both services.


Run ipconfig /all in a command line on each computer & compare them.
You can use ipconfig /all >c:\myip.txt to pipe the output to a text
file to make this easier.

Now, a strange thing is that
I can ping the router but I cannot get to its web based utility by
typing its address either on Firefox o IE6. I can do this from the
wireless laptop without a problem.

Address = IP address?


* Disabled the wireless card on the Laptop and wired it directly
to the router. It can connect to the router, the network and
internet. * Bought a new NIC, now a Linksys Network Everywhere
(hoping for compatibility with the router) and cable and installed
it on the wired computer. Same problem: autoconfigured address and
no access.

Did you try a different patch cable? Different port on the
hub/switch?


* Did a hard reset on the Motorola Cable Modem and on the router
and reconfigured manually the options. No luck either.
* Disabled and then unistalled ZoneAlarm to test connections.
Still no internet access. I have now reinstalled it and accessing
the network through a static IP but I cannot connect to the
internet.

See above (re DNS)

So far it does not seem to be related to the router, the cable or
the NIC card on the wired desktop so I am thinking of a software
setting. I have run out of ideas of things to try and hope you can
help. The wired desktop is running W2K Professional and the others
XP SP2. The wireless network is running with WEP but I have no
problem in the wireless section of my network, it's the wired the
problem.

Thanks for your interest in helping me,
Efren
Click to expand...
Click to expand...
Click to expand...
 
In Efren <[email protected]> typed:

Well, I went to the properties of the Local Area connection and, under
TCP/IP I have only one tab, General and there is no evident place
where I can turn on DHCP. I went to the advanced screen and can't
find in any of the tabs (IP settings, DNS, WINS and options) anything
that suggest that can activate DHCP. Where do I do this? and, what
does it do? (the DHCP server is on the router, isn't it?)
Click to expand...

Yes. You want to select "Obtain an IP address automatically" and do the same
for DNS if you wish.
Actually what I tried was to test the port and the cable that went to
the wired desktop so I disabled the wireless connection on the laptop
and connected the cable that went to the desktop to the laptop and it
could connect to the network, to the setup utility of the router and
to the internet. That, I think, means that the cable and the port on
the router works.
OK.

I am puzzled at the fact that I can ping the router and the DNS server
on my ISP but I am not able to get to it's setup utility on the
browser nor to the internet. If I can ping the DNS servers on my ISP,
isn't it true that I am actually getting to the internet?
Yes.

If that's
true, why can't I browse it?
Click to expand...

Usually a DNS problem.
The same is true for pinging the router.
If I can ping it, then why I cannot get it to display its setup page?
Click to expand...

That sounds like another problem to me, as it doesn't have any name
resolution issues....
Do you have any software firewalls in use?
You're trying and that's great and I sincerely thank you,
Click to expand...

<snip>
 
Inline,

Lanwench [MVP - Exchange] ha escrito:
In Efren <[email protected]> typed:



Yes. You want to select "Obtain an IP address automatically" and do the same
for DNS if you wish.
Click to expand...

Well, that's the way originally it was configured and worked for a few
months until suddenly stopped connecting and I got the autoconfigured
address. But I did try again; see below.
Usually a DNS problem.


That sounds like another problem to me, as it doesn't have any name
resolution issues....
Do you have any software firewalls in use?
Click to expand...

Yes I do; I use ZoneAlarm and today I unloaded it, rebooted the
computer to make sure it was unloaded and then changed the properties
of the wired computer to "obtain IP address automatically"; did the
same for the DNS. Well, I'm back to square one: no connection to the
network or the internet and I'm not able to ping either the router or
other computer on the network or yahoo.com. Checking ipconfig reveals
that I am getting again the autoconfigured address.

Reversed that to a static IP address and now I can ping the router but
not get to its setup page on my browser and got back my network
functionality but still no connection to the internet (although I can
ping the DNS on the ISP).

Today I brought home the router of the office network. It is a D-Link
DI-124 that has less than a month of connecting our office and was
working fine there. I substituted it for the Linksys and found that the
problem it still there. Connecting it to the wired computer and setting
the computer to get its address automatically gets the autoconfigured
address that is not in the subnet of the router so I cannot ping it or
go to its configuration page. I changed the connection to an static IP
address and am still unable to go to the setup page (same like in the
Linksys) so I cannot configure it from the wired desktop. All of this
was done while there was no firewall on the computer.

So I swithched back to the Linksys and configured everything back as it
was so I got network functionality but no internet access; I hope you
can make something of these tests and figure out a solution.

Thanks again for your effort,
Efren
 
Problem Solved!

Read another post in this forum about losing internet connections after
upgrading to version 6 of ZoneAlarm and a poster recommended using
LSPfix, a free utility that repairs winsock-2 settings.The webpage
http://www.cexx.org/lspfix.htm details that it can happen after the
improper removal of some internet software. Well, ZoneAlarm has an
adware removal tool and I removed some programs that it identified as
malware (newnet and a couple of others). I think that this was what was
causing the problems because as soon as I ran LSPfix I got connected
again. After Win2K downloaded an update for SP4 I reenabled ZoneAlarm
and went back to a dinamically assigned IP address without any problem.

I hope this information helps someone with a similar problem.
 
In
Efren said:
Problem Solved!

Read another post in this forum about losing internet connections
after upgrading to version 6 of ZoneAlarm and a poster recommended
using LSPfix, a free utility that repairs winsock-2 settings.The
webpage http://www.cexx.org/lspfix.htm details that it can happen
after the improper removal of some internet software. Well, ZoneAlarm
has an adware removal tool and I removed some programs that it
identified as malware (newnet and a couple of others). I think that
this was what was causing the problems because as soon as I ran
LSPfix I got connected again. After Win2K downloaded an update for
SP4 I reenabled ZoneAlarm and went back to a dinamically assigned IP
address without any problem.

I hope this information helps someone with a similar problem.
Click to expand...

ah - sorry I didn't mention winsock repair tools - it's just that the
problem with accessing the router via its IP address didn't seem to indicate
it. Good to keep a copy of the winsockfix stuff around you, for sure. Glad
you got this working!
 
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