Bizarre inability to browse internet

M

Mathew

I posted this message in .networking a couple days ago, but thought the
problem was resolved. Well, it isn't. But I have a little more info and it
may be more appropriate to post here.

Win 2k professional, 3 computers on local network behind Sonicwall firewall,
DSL connection

For the last 3 days, Computer "A" loses the ability to browse the internet
every morning after functioning fine for 40-60 minutes. That is, I'll be
surfing along with no problem and it will suddenly jump to the dnserror.htm
page.

After the failure occurs, I am not able to ping external sites by EITHER
domain name or IP address. But I AM able to ping local local names &
addresses, and connect to shares on other local machines.

Computers "B" and "C" on the local network can still access the internet
(with the exact same DHCP provided settings as Computer A).

I'll fiddle around withComputer A throughout the day with no success, shut
it down for the night, and the next morning it will work fine for an hour or
so.

I double checked the settings, released/renewed IP settings, deleted and
reinstalled the network adapter, swapped network cables and changed hub
ports, all to no avail.

Anyone have any suggestions?

TIA
Mathew
 
D

Dave Patrick

From a command prompt
ipconfig /all
before and after may reveal something.

--
Regards,

Dave Patrick ....Please no email replies - reply in newsgroup.
Microsoft MVP [Windows]
Microsoft Certified Professional [Windows 2000]
http://www.microsoft.com/protect


:
| I posted this message in .networking a couple days ago, but thought the
| problem was resolved. Well, it isn't. But I have a little more info and it
| may be more appropriate to post here.
|
| Win 2k professional, 3 computers on local network behind Sonicwall
firewall,
| DSL connection
|
| For the last 3 days, Computer "A" loses the ability to browse the internet
| every morning after functioning fine for 40-60 minutes. That is, I'll be
| surfing along with no problem and it will suddenly jump to the
dnserror.htm
| page.
|
| After the failure occurs, I am not able to ping external sites by EITHER
| domain name or IP address. But I AM able to ping local local names &
| addresses, and connect to shares on other local machines.
|
| Computers "B" and "C" on the local network can still access the internet
| (with the exact same DHCP provided settings as Computer A).
|
| I'll fiddle around withComputer A throughout the day with no success, shut
| it down for the night, and the next morning it will work fine for an hour
or
| so.
|
| I double checked the settings, released/renewed IP settings, deleted and
| reinstalled the network adapter, swapped network cables and changed hub
| ports, all to no avail.
|
| Anyone have any suggestions?
|
| TIA
| Mathew
|
|
 
M

Mathew

Here are it's current settings (which are virtually identical to the other
computers on the local network):

Windows 2000 IP Configuration

Host Name . . . . . . . . . . . . : ctserver
Primary DNS Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Broadcast
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No

Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Intel(R) PRO/1000 MT Network
Conne
Physical Address. . . . . . . . . : 00-0C-F1-A5-00-A8
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IP Address. . . . . . . . . . . . : 192.168.168.3
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.168.1
DHCP Server . . . . . . . . . . . : 192.168.168.1
DNS Servers . . . . . . . . . . . : 204.127.202.4
216.148.227.68
Lease Obtained. . . . . . . . . . : Thursday, March 11, 2004 7:05:08
A
Lease Expires . . . . . . . . . . : Tuesday, March 16, 2004 5:46:34
PM
 
D

Dave Patrick

OK ... you'll want to do this again when you lose the connection.

--
Regards,

Dave Patrick ....Please no email replies - reply in newsgroup.
Microsoft MVP [Windows]
Microsoft Certified Professional [Windows 2000]
http://www.microsoft.com/protect


:
| Here are it's current settings (which are virtually identical to the other
| computers on the local network):
|
| Windows 2000 IP Configuration
|
| Host Name . . . . . . . . . . . . : ctserver
| Primary DNS Suffix . . . . . . . :
| Node Type . . . . . . . . . . . . : Broadcast
| IP Routing Enabled. . . . . . . . : No
| WINS Proxy Enabled. . . . . . . . : No
|
| Ethernet adapter Local Area Connection:
|
| Connection-specific DNS Suffix . :
| Description . . . . . . . . . . . : Intel(R) PRO/1000 MT Network
| Conne
| Physical Address. . . . . . . . . : 00-0C-F1-A5-00-A8
| DHCP Enabled. . . . . . . . . . . : Yes
| Autoconfiguration Enabled . . . . : Yes
| IP Address. . . . . . . . . . . . : 192.168.168.3
| Subnet Mask . . . . . . . . . . . : 255.255.255.0
| Default Gateway . . . . . . . . . : 192.168.168.1
| DHCP Server . . . . . . . . . . . : 192.168.168.1
| DNS Servers . . . . . . . . . . . : 204.127.202.4
| 216.148.227.68
| Lease Obtained. . . . . . . . . . : Thursday, March 11, 2004
7:05:08
| A
| Lease Expires . . . . . . . . . . : Tuesday, March 16, 2004
5:46:34
| PM
 
D

Dave Patrick

OK.... can you ping the;
Default Gateway/ DHCP Server
DNS Servers

--
Regards,

Dave Patrick ....Please no email replies - reply in newsgroup.
Microsoft MVP [Windows]
Microsoft Certified Professional [Windows 2000]
http://www.microsoft.com/protect


:
| Hi Dave,
|
| Those ARE the "connection lost" settings.
|
| Thanks,
| Mathew
 
D

Dave Patrick

What happens if you from a command prompt;
ipconfig /release
ipconfig /renew

--
Regards,

Dave Patrick ....Please no email replies - reply in newsgroup.
Microsoft MVP [Windows]
Microsoft Certified Professional [Windows 2000]
http://www.microsoft.com/protect


:
| I can ping the Gateway and DHCP server, but can not ping either of the DNS
| servers.
 
C

Carl Fenley

Mathew said:
Here are it's current settings (which are virtually identical to the
other computers on the local network):

Windows 2000 IP Configuration

IP Address. . . . . . . . . . . . : 192.168.168.3
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.168.1
DHCP Server . . . . . . . . . . . : 192.168.168.1
Click to expand...

Matt,

I just want to confirm that your gateway and other computers are on a
192.168.168.X network instead of a 192.168.1.X network.

This sounds like one helluva problem. The only suggestion I can come up
with off the top of my head is to check the DHCP settings on the DHCP
Server/Router. For example, my Linksys Router has a setting called "Number
of DHCP Users". Obviously, this number would have to be equal to or greater
than the number of devices obtaining an IP address, including the Router
itself.

I know it is a stretch, but that's all I can come up with at the moment.

- carl
 
M

Mathew

The settings are appropriately released & renewed, but no change in the
overall situation.
 
M

Mathew

Hi Carl,

Yes, it's a 192.168.168.X network.

That's a good thought about DHCP limitations, I wondered about that myself.
But that doesn't appear to be the problem. We're well within the maximum
number of leases. Just in case, I also dumped all the leases on the DHCP
server so everyone would have to get them all over again, but no change.

Mathew
 
D

Dave Patrick

You might try reinstalling the tcp stack. Also make sure you don't have any
unused protocols installed.

How to Remove and Reinstall TCP/IP for Windows 2000 (Q285034)
http://support.microsoft.com/?id=285034


--
Regards,

Dave Patrick ....Please no email replies - reply in newsgroup.
Microsoft MVP [Windows]
Microsoft Certified Professional [Windows 2000]
http://www.microsoft.com/protect


:
| The settings are appropriately released & renewed, but no change in the
| overall situation.
 
M

Mathew

Thanks for including the link for how to reinstall the tcp stack.

I followed the instructions, but no change in the situation.

Mathew
 
D

Dave Patrick

I've seen stranger things happen with those linksys routers. You might try a
different port or another router.

--
Regards,

Dave Patrick ....Please no email replies - reply in newsgroup.
Microsoft MVP [Windows]
Microsoft Certified Professional [Windows 2000]
http://www.microsoft.com/protect


:
| Thanks for including the link for how to reinstall the tcp stack.
|
| I followed the instructions, but no change in the situation.
|
| Mathew
 
B

Bryan Martin

Also you mentioned a sonicwall firewall i think. You havent told the router
to only allow internet access during certain times for that host have you.
This would of course be on the routers settings.

Bryan
 

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