unable to access internet


G

Guest

Windows XP Pro SP1 with all updates except SP2
Computer lab; 10 PCs with identical hardware & software
Each machine has an admin account & a user account
Files can be accessed across the network, but I cannot access the internet
from 1 of the 10 computers.

Problem was not present 22 Feb; problem noted 24 Feb; persists today.

Steps I have taken:
ping gateway > works
ping DNS servers > all fail; all fail from any computer in the lab, even
fails on those computers that can access the Internet.
When I ping the dns servers, using www.codeflux.com/tools, the ping process
is successful.
ipconfig /release
ipconfig /renew
ipconfig /flushdns

ping 204.71.200.75 [ 1 of yahoo's ip addresses ]
4 packets sent; 4 packets lost
request times out

ping yahoo.com
4 packets sent; 4 packets lost
request times out

repaired connection within Networking applet of control panel.

verified that firewall is not running;
verified TCP/IP filtering is not active;
verified that I am logged on, using admin account;

scanned for viruses, none found.
I see nothing strange in the running processes.

I have read http://support.microsoft.com/default.aspx?scid=kb;EN-US;q299357
, but I don't understand the netsh command usage.

I tried to test the Winsock. I read http://support.microsoft.com/kb/811259
.. My system information does not display "components".
I ran a network diag tool from within System information.
It reports:
Network adapters NIC manufacturer / model FAILED
DSNServerSearchOrder [ FAILED ]
IP address of DNS server 1 [ failed ]
IP address of DNS server 2 [ failed ]
IP address of DNS server 3 [ failed ]

No problems noted with other items tested.

Your guidance will be appreciated.
 
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C

Chuck

Windows XP Pro SP1 with all updates except SP2
Computer lab; 10 PCs with identical hardware & software
Each machine has an admin account & a user account
Files can be accessed across the network, but I cannot access the internet
from 1 of the 10 computers.

Problem was not present 22 Feb; problem noted 24 Feb; persists today.

Steps I have taken:
ping gateway > works
ping DNS servers > all fail; all fail from any computer in the lab, even
fails on those computers that can access the Internet.
When I ping the dns servers, using www.codeflux.com/tools, the ping process
is successful.
ipconfig /release
ipconfig /renew
ipconfig /flushdns

ping 204.71.200.75 [ 1 of yahoo's ip addresses ]
4 packets sent; 4 packets lost
request times out

ping yahoo.com
4 packets sent; 4 packets lost
request times out

repaired connection within Networking applet of control panel.

verified that firewall is not running;
verified TCP/IP filtering is not active;
verified that I am logged on, using admin account;

scanned for viruses, none found.
I see nothing strange in the running processes.

I have read http://support.microsoft.com/default.aspx?scid=kb;EN-US;q299357
, but I don't understand the netsh command usage.

I tried to test the Winsock. I read http://support.microsoft.com/kb/811259
. My system information does not display "components".
I ran a network diag tool from within System information.
It reports:
Network adapters NIC manufacturer / model FAILED
DSNServerSearchOrder [ FAILED ]
IP address of DNS server 1 [ failed ]
IP address of DNS server 2 [ failed ]
IP address of DNS server 3 [ failed ]

No problems noted with other items tested.

Your guidance will be appreciated.

Wiley,

Sounds like you have a few problems. Or maybe not. And you've done some
research, but found, like many, that the Microsoft KB articles are just a tiny
bit cryptic.

Please start by providing ipconfig information for the problem computer, and for
one working computer.
Start - Run - "cmd". Type "ipconfig /all >c:\ipconfig.txt" into the command
window - Open c:\ipconfig.txt in Notepad, make sure that Format - Word Wrap is
NOT checked!, copy and paste entire contents into your next post. Identify
operating system (by name, version, and SP level) with each ipconfig listing.

This does indeed sound like an LSP / Winsock problem. Without SP2, you can't
use netsh to reset it, unfortunately.

Give LSP-Fix <http://www.cexx.org/lspfix.htm>, WinsockFix
<http://www.tacktech.com/display.cfm?ttid=257>, or WinsockXPFix
<http://www.spychecker.com/program/winsockxpfix.html> a shot.

If no help yet, reset TCP/IP.
Start - Run - "cmd". Type "netsh int ip reset c:\netsh.txt" into the command
window.

If no help yet, we'll take a look at the IPConfigs and decide what to check
next.

--
Cheers,
Chuck
Paranoia comes from experience - and is not necessarily a bad thing.
My email is AT DOT
actual address pchuck sonic net.
 
G

Guest

Chuck:
Thanks for the hopeful reply.

Sorry, but for security purposes, I will not give out the exact information
you requested, Chuck.

IP = 192.168.240.56
gateway: 192.168.240.1

DNS1: 199.abc.def.ghi
DNS2: 199.abc.def.jkL
DNS3: 199.abc.def.mnp

Except for the IP address, these values are the same on each of the other 9
PCs in the Lab.

I'll run the LSP fix I Winsock fix tools you recommend, and the tcp/ip reset
command.

I'll return to the Lab 01 Mar, and re-post after that visit.

WC
 
I

Interrogative

Wiley C said:
Windows XP Pro SP1 with all updates except SP2
Computer lab; 10 PCs with identical hardware & software
Each machine has an admin account & a user account
Files can be accessed across the network, but I cannot access the internet
from 1 of the 10 computers.

Problem was not present 22 Feb; problem noted 24 Feb; persists today.

Steps I have taken:
ping gateway > works
ping DNS servers > all fail; all fail from any computer in the lab, even
fails on those computers that can access the Internet.
When I ping the dns servers, using www.codeflux.com/tools, the ping
process

The DNS servers may well just be dropping pings generated from within your
network normally.
is successful.
ipconfig /release
ipconfig /renew
ipconfig /flushdns

ping 204.71.200.75 [ 1 of yahoo's ip addresses ]
4 packets sent; 4 packets lost
request times out

ping yahoo.com
4 packets sent; 4 packets lost
request times out

repaired connection within Networking applet of control panel.

verified that firewall is not running;
verified TCP/IP filtering is not active;
verified that I am logged on, using admin account;

scanned for viruses, none found.
I see nothing strange in the running processes.

I have read
http://support.microsoft.com/default.aspx?scid=kb;EN-US;q299357
, but I don't understand the netsh command usage.

I tried to test the Winsock. I read
http://support.microsoft.com/kb/811259
. My system information does not display "components".
I ran a network diag tool from within System information.
It reports:
Network adapters NIC manufacturer / model FAILED
DSNServerSearchOrder [ FAILED ]
IP address of DNS server 1 [ failed ]
IP address of DNS server 2 [ failed ]
IP address of DNS server 3 [ failed ]

No problems noted with other items tested.

Your guidance will be appreciated.

Sounds like an MTU problem. Try this:
http://www.annoyances.org/exec/show/article04-107
 
G

Guest

Interrogative:
I think you are correct about the DNS server dropping / not responding to
pings.

Thanks for the link. I'll give it a try & repost, 01 Mar 2005.

WC

Interrogative said:
Wiley C said:
Windows XP Pro SP1 with all updates except SP2
Computer lab; 10 PCs with identical hardware & software
Each machine has an admin account & a user account
Files can be accessed across the network, but I cannot access the internet
from 1 of the 10 computers.

Problem was not present 22 Feb; problem noted 24 Feb; persists today.

Steps I have taken:
ping gateway > works
ping DNS servers > all fail; all fail from any computer in the lab, even
fails on those computers that can access the Internet.
When I ping the dns servers, using www.codeflux.com/tools, the ping
process

The DNS servers may well just be dropping pings generated from within your
network normally.
is successful.
ipconfig /release
ipconfig /renew
ipconfig /flushdns

ping 204.71.200.75 [ 1 of yahoo's ip addresses ]
4 packets sent; 4 packets lost
request times out

ping yahoo.com
4 packets sent; 4 packets lost
request times out

repaired connection within Networking applet of control panel.

verified that firewall is not running;
verified TCP/IP filtering is not active;
verified that I am logged on, using admin account;

scanned for viruses, none found.
I see nothing strange in the running processes.

I have read
http://support.microsoft.com/default.aspx?scid=kb;EN-US;q299357
, but I don't understand the netsh command usage.

I tried to test the Winsock. I read
http://support.microsoft.com/kb/811259
. My system information does not display "components".
I ran a network diag tool from within System information.
It reports:
Network adapters NIC manufacturer / model FAILED
DSNServerSearchOrder [ FAILED ]
IP address of DNS server 1 [ failed ]
IP address of DNS server 2 [ failed ]
IP address of DNS server 3 [ failed ]

No problems noted with other items tested.

Your guidance will be appreciated.

Sounds like an MTU problem. Try this:
http://www.annoyances.org/exec/show/article04-107
 
G

Guest

Interrogative:
You are the winner!

Thanks for your help.

1. Why did it sound like an MTU problem? The computer lab has 10
identically confiured [ hardware, OS, apps ] PCs. Only one experienced the
problem. I set the MTU to 1454 & presto / chango [ & a reboot ], I'm a surf
bum.

2. I am still confused as to why I could access local network resources [
shared files, printers ] but not access the internet.

3. Why do you think this happened? I rescalled for viruses, locally with
Sym Corp & at panda's web site. I also searched for spyware with Spybot.
Neither effort produced any malware.

Thanks again.

WC


Interrogative said:
Wiley C said:
Windows XP Pro SP1 with all updates except SP2
Computer lab; 10 PCs with identical hardware & software
Each machine has an admin account & a user account
Files can be accessed across the network, but I cannot access the internet
from 1 of the 10 computers.

Problem was not present 22 Feb; problem noted 24 Feb; persists today.

Steps I have taken:
ping gateway > works
ping DNS servers > all fail; all fail from any computer in the lab, even
fails on those computers that can access the Internet.
When I ping the dns servers, using www.codeflux.com/tools, the ping
process

The DNS servers may well just be dropping pings generated from within your
network normally.
is successful.
ipconfig /release
ipconfig /renew
ipconfig /flushdns

ping 204.71.200.75 [ 1 of yahoo's ip addresses ]
4 packets sent; 4 packets lost
request times out

ping yahoo.com
4 packets sent; 4 packets lost
request times out

repaired connection within Networking applet of control panel.

verified that firewall is not running;
verified TCP/IP filtering is not active;
verified that I am logged on, using admin account;

scanned for viruses, none found.
I see nothing strange in the running processes.

I have read
http://support.microsoft.com/default.aspx?scid=kb;EN-US;q299357
, but I don't understand the netsh command usage.

I tried to test the Winsock. I read
http://support.microsoft.com/kb/811259
. My system information does not display "components".
I ran a network diag tool from within System information.
It reports:
Network adapters NIC manufacturer / model FAILED
DSNServerSearchOrder [ FAILED ]
IP address of DNS server 1 [ failed ]
IP address of DNS server 2 [ failed ]
IP address of DNS server 3 [ failed ]

No problems noted with other items tested.

Your guidance will be appreciated.

Sounds like an MTU problem. Try this:
http://www.annoyances.org/exec/show/article04-107
 
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I

Interrogative

Wiley C said:
Interrogative:
You are the winner!

Thanks for your help.

No probs.
1. Why did it sound like an MTU problem?

It may sound conceited but the honest answer is "experience". Seen things
not QUITE the same but similar many times. I dont specialise JUST in
networking but as luck would have it where I live, my customers seem to have
networking problems and....well I cant type the rest without looking like I
think my crap doesnt stink. :)
The computer lab has 10
identically confiured [ hardware, OS, apps ] PCs. Only one experienced
the
problem. I set the MTU to 1454 & presto / chango [ & a reboot ], I'm a
surf
bum.

Yep, it's amazing to see a machine that suddenly bursts into life on the net
after such a simple change, isnt it?
2. I am still confused as to why I could access local network resources [
shared files, printers ] but not access the internet.

Local shares would all be accessible, under normal circumstances, at the
highest possible speed.
3. Why do you think this happened? I rescalled for viruses, locally with
Sym Corp & at panda's web site. I also searched for spyware with Spybot.
Neither effort produced any malware.

I think you will find that if you reinstalled the OS, you would achieve the
same result as changing the MTU. I cant remember which OS you said you have
but if 2K or XP, run an "SFC /SCANNOW" on the machine. It may really be
needed. I find an MTU problem also is an indication that other problems are
about. It may just be coincidence but it is usually the case.
Thanks again.

No probs. In the words of the great Apu (Simpsons): "Thank you, call again!"
:)
 
G

Guest

I:
Your advice & humor are appreciated.

Back in the 70's, Revox, a European manufacturer of audio equipment had a
motto:
"Experience replaces nothing, but nothing replaces experience."

Changing the MTU is clearly easier than re-installing [ or running sfc /
scannow ].

Windows XP Pro SP1

WC

Interrogative said:
Wiley C said:
Interrogative:
You are the winner!

Thanks for your help.

No probs.
1. Why did it sound like an MTU problem?

It may sound conceited but the honest answer is "experience". Seen things
not QUITE the same but similar many times. I dont specialise JUST in
networking but as luck would have it where I live, my customers seem to have
networking problems and....well I cant type the rest without looking like I
think my crap doesnt stink. :)
The computer lab has 10
identically confiured [ hardware, OS, apps ] PCs. Only one experienced
the
problem. I set the MTU to 1454 & presto / chango [ & a reboot ], I'm a
surf
bum.

Yep, it's amazing to see a machine that suddenly bursts into life on the net
after such a simple change, isnt it?
2. I am still confused as to why I could access local network resources [
shared files, printers ] but not access the internet.

Local shares would all be accessible, under normal circumstances, at the
highest possible speed.
3. Why do you think this happened? I rescalled for viruses, locally with
Sym Corp & at panda's web site. I also searched for spyware with Spybot.
Neither effort produced any malware.

I think you will find that if you reinstalled the OS, you would achieve the
same result as changing the MTU. I cant remember which OS you said you have
but if 2K or XP, run an "SFC /SCANNOW" on the machine. It may really be
needed. I find an MTU problem also is an indication that other problems are
about. It may just be coincidence but it is usually the case.
Thanks again.

No probs. In the words of the great Apu (Simpsons): "Thank you, call again!"
:)
 
G

Guest

I have a similar problem with another computer in the Lab; identical hardware
& software.

I can access the Internet as "administrator" and as a member of the
administrator group, but not as a member of the "user" group nor as a "power
user".

I changed the MTU, but the problem persists.

Your guidance is appreciated.

WC



Interrogative said:
Wiley C said:
Interrogative:
You are the winner!

Thanks for your help.

No probs.
1. Why did it sound like an MTU problem?

It may sound conceited but the honest answer is "experience". Seen things
not QUITE the same but similar many times. I dont specialise JUST in
networking but as luck would have it where I live, my customers seem to have
networking problems and....well I cant type the rest without looking like I
think my crap doesnt stink. :)
The computer lab has 10
identically confiured [ hardware, OS, apps ] PCs. Only one experienced
the
problem. I set the MTU to 1454 & presto / chango [ & a reboot ], I'm a
surf
bum.

Yep, it's amazing to see a machine that suddenly bursts into life on the net
after such a simple change, isnt it?
2. I am still confused as to why I could access local network resources [
shared files, printers ] but not access the internet.

Local shares would all be accessible, under normal circumstances, at the
highest possible speed.
3. Why do you think this happened? I rescalled for viruses, locally with
Sym Corp & at panda's web site. I also searched for spyware with Spybot.
Neither effort produced any malware.

I think you will find that if you reinstalled the OS, you would achieve the
same result as changing the MTU. I cant remember which OS you said you have
but if 2K or XP, run an "SFC /SCANNOW" on the machine. It may really be
needed. I find an MTU problem also is an indication that other problems are
about. It may just be coincidence but it is usually the case.
Thanks again.

No probs. In the words of the great Apu (Simpsons): "Thank you, call again!"
:)
 
I

Interrogative

Wiley C said:
I have a similar problem with another computer in the Lab; identical
hardware
& software.

I can access the Internet as "administrator" and as a member of the
administrator group, but not as a member of the "user" group nor as a
"power
user".

I changed the MTU, but the problem persists.

Your guidance is appreciated.

A little bit of a vague issue for me this one. However, my immediate
response is that the Administrator newsgroup has all the normal permissions
that Administrators would, set to access internet on that particular machine
BUT the other usergroups mentioned are disallowed access to Internet from
that machine only OR possibly disallowed networking access entirely in those
lower usergroups. Have you checked the group permission settings?

MTU shouldn't make any difference at all if you can access Internet properly
on one group.
 
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G

Guest

I:
This happened out of the blue; "user" able to access the Internet one day,
unable the next.
No group policies have been set.

No, I did not check group policies.

I tried the MTU because 1 of the other lab PCs had the "unable to access the
internet issue" last week. After changing the MTU didn't fix the problem, I
looked deeper ito the issue.

WC

WC
 
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