Computer does not hook up to internet

[bolumenb]

My computer was working fine and now is not able to "see" the internet. My cable modem and router are fine since my laptop is able to access the internet and get emails but not with my desktop which has the ethernet cable from the router directly.
I have used system restore to go back to yesterday (last time it worked fine) and still no dice.
What can I check to troubleshoot and find the culprit?

[Saab Dastard]

And the operating system is?

[bolumenb]

Win XP is the operating system
Never had a problem with accessing the internet like this until now and have been using this computer since I bought it over 2 years ago.

[Saab Dastard]

OK, let's start at the bottom and work up -

Is the LAN card disabled?
Is the LAN cable connected correctly at both ends?
Do you have a link light on the router port?
At a command (CMD) prompt, type IPCONFIG / ALL - what do you see?

SD

[bolumenb]

Is the LAN card disabled?
Don't know how to tell whether disabled or not. Just the day prior to sending the message for help everything was well.

Is the LAN cable connected correctly at both ends?
I am assuming you are talking about Ethernet port. There is a cable from cable modem to router and then another goes from the router to the computer and it is connected fine. There is a light on the computer where the cable hooks up and there are the following lights in the router:
Power / Status / Wan / WLan / Local Network ports 2 and 4
Also, the computer indicates "local area connection is now connected. Speed 100.0 MBPS"

Do you have a link light on the router port?
At a command (CMD) prompt, type IPCONFIG / ALL - what do you see?
There is lots of things but I will try and write what "I think" may be pertinent and if there is something else you need, let me know.
Node type: Hybrid / ip Routing Enabled: no / WINS Proxy Enabled: No
Ethernet NIC: DHCP Enabled: Yes / Autioconfig enabled: yes
Then it has IP Address / SUBNET Mask / Default Gateway /DHCP & DNS Servers, etc.
What do you need?

[Saab Dastard]

Is the LAN card disabled?

Network Properties, right click on the LAN connection - if "Enable" is an option, then it is disabled, and vice-versa.

IPCONFIG / ALL
Can you copy and paste the ipconfig here? Right click the command window, you can then Mark and Copy the text.

SD

[Gertrude the Wombat]

Then it has IP Address / SUBNET Mask / Default Gateway /DHCP & DNS Servers, etc.
What do you need?
Er, well, the

IP Address / SUBNET Mask / Default Gateway /DHCP & DNS Servers, etc

would be helpful, actually. That would tell us stuff like whether the PC has found a DHCP server or not, which would be a good place to start.

[pulse1]

Don't know much about computers but I had this problem the other day after a very short power cut. I swapped USB ports and everything then worked OK.

[bolumenb]

Quote:
Is the LAN card disabled?
Network Properties, right click on the LAN connection - if "Enable" is an option, then it is disabled, and vice-versa.

Yes, it is enabled since disable is an option


Quote:
IPCONFIG / ALL
Can you copy and paste the ipconfig here? Right click the command window, you can then Mark and Copy the text.

I don't know how to copy and paste since:
1) under the DOS c:\ , etc. using a mouse to highlight to copy I cannot do, if you can tell me how to copy and paste under DOS it would be much appreciated.
2) in addition, there is no way that even copy and paste would work since I am using a different computer to send this since mine does not access the internet so I don't know what I would copy and paste to to get here except I guess to a CD.
Maybe I will try and go back and write everything down and type it as unless someone let's me know how to do it easier otherwise.
Hope I made sense above.
I also tried to creat a new connection but that did not work also.
Thanks.

[bolumenb]

O.K. Here is the rest of it, hopefully not many errors in typing:
Ethernet adapter local area connection:
connection specific dns suffix: cpe.wadsnet.com
Description: Realtek RTL8139/810x family Fast
Ethernet NIC:
Phys Address: 00-0C-6E-46-84-40
Dhcp enabled: Yes
Autoconfig enabled: yes
IP Address: 192.168.0.102
Subnet Mask:255.255.255.0
Default Gateway: 192.168.0.1
dhcp server: 192.168.0.1
dns servers: 192.168.1.9
64.245.166.16

I think this is it or do you need something else?

[Gertrude the Wombat]

Well, that looks like the PC has plausibly found a DHCP server, which I assume is in your router, which has handed it useful information.

The only obviously curious thing there is the private address, on a different subnet, for the first DNS server.

What do you get with IPCONFIG on the laptop that's working?

[rotorcraig]

Agree it looks to be working but the DNS Server Subnet looks dodgy.

Try the following:


Start
Control Panel
Network Connections
Right Click on Local Area Connections
Properties
Highlight "Internet Protocol (TCP/IP)"
Properties


The screen that comes up has two tabs. There are 3 settings (IP Address, DNS Server Address, Private IP Address) - are they all set to automatic?

RC

[Saab Dastard]

Right,

As noted by others, all looks OK except for the 192.168.1.9 DNS server entry.

However, as 64.245.166.16 is the second DNS entry, it "should" contact that if the first is unobtainable. Of course, if the 192.168.1.9 responds on port 53 (DNS) with duff information, then it wouldn't go to the alternate.

What happens when you ping 127.0.0.1? You should get 4 replies.
What happens when you ping loopback? It should resolve to your [computername] on 127.0.0.1 and get 4 replies.
What happens when you ping 192.168.0.102?
What happens when you ping 192.168.0.1?
What happens when you ping www.pprune.org?
What happens when you ping 213.161.73.143?

Out of curiosity, what happens when you ping 192.168.1.9?

That lot checks basic IP connectivity and DNS name resolution.

If that all works, then the problem is in the browser - next lesson!

SD

[Gertrude the Wombat]

However, as 64.245.166.16 is the second DNS entry, it "should" contact that if the first is unobtainable.
Yeah, that's what was confusing me.

[bolumenb]

Laptop - IPCONFIGG /ALL
Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.
C:\>ipconfig /all
Windows IP Configuration
Host Name . . . . . . . . . . . . : maria
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Unknown
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : cpe.wadsnet.com
Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix . : cpe.wadsnet.com
Description . . . . . . . . . . . : Intel(R) PRO/100 VE Network Connecti
on
Physical Address. . . . . . . . . : 00-00-39-24-C0-D6
Dhcp Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IP Address. . . . . . . . . . . . : 192.168.0.102
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.0.1
DHCP Server . . . . . . . . . . . : 192.168.0.1
DNS Servers . . . . . . . . . . . : 192.168.0.1
Lease Obtained. . . . . . . . . . : Sunday, November 19, 2006 12:03:17 P
M
Lease Expires . . . . . . . . . . : Sunday, November 26, 2006 12:03:17 P
M
Ethernet adapter Local Area Connection 2:
Media State . . . . . . . . . . . : Media disconnected
Description . . . . . . . . . . . : 3Com 3C920 Integrated Fast Ethernet
Controller (3C905C-TX Compatible)
Physical Address. . . . . . . . . : 00-00-39-47-B5-35
C:\>
==============
All 3 addresses are set to Automatic so I am assuming this is O.K.
===================
On the "ping" - it goes too fast and I can hardly even read the first line much less the rest. Any way to slow it down so I can read and type on my laptop to send?

[bolumenb]

The only "ping" that seems to give me plenty of time is ping www.pprune.org (http://www.pprune.org) which gives me a black screen with nothing on it.

[bolumenb]

Was able to ping 192.168.1.9 which it ran slow and I was able to copy - all others are too fast.
it states
"pinging 102.168.1.9 with 32 bytes of data"
request time out
request time out
request time out
Then it has another line or two but too fast that I can't make out what it says.

[Saab Dastard]

You should first open a command window - Start, Run, type CMD then you'll have plenty of time to see what is on the screen.

Very odd that the laptop configuration has 192.168.0.1 as the DNS server. I can only surmise that the router is forwarding the DNS requests to the real DNS server.

What is the router?

SD

[bolumenb]

The router is D-Link Model DI-624-AirPlusXtreme G- wireless router. It is only a few months old and has worked fine so far.
==============
1) ping 127.0.0.1 - same reply 4 X - bytes=32 time<1ms TTL=128
2) ping loopback - same as above
3) ping 192.168.0.102 - request timed out - 4x
4) ping 192.168.0.1 - same as (1) except TTL=127
5) ping 213.161.73.143 - 4 different times with bytes=32 and TTL=53
a) time 127 ms
b) time 115 ms
c) time 115 ms
d) time 116 ms
6) ping 192.168.1.9 - request times out 4X
==========
I think that answers all the questions?

[rotorcraig]

All 3 addresses are set to Automatic so I am assuming this is O.K.Yes, very strange that it's not working.

RC

[Saab Dastard]

3) ping 192.168.0.102 - request timed out - 4x

In a post above you said that 192.168.0.102 was the address of your PC - yet you now find that you can't ping it????

In another post you have the laptop with 192.168.0.102!!!!

If 2 nodes on the network have the same IP address you are going to have problems.

You haven't indicated what happens when you ping www.pprune.org

What happens if you connect your laptop to the router with the LAN cable and switch off the wireless adapter? What IPCONFIG /all settings do you get? Can you access the internet from the laptop?

SD

[rotorcraig]

Very odd that the laptop configuration has 192.168.0.1 as the DNS server.

Wouldn't have said so ... my PC is wired into a Netgear router. PC is 192.168.0.2 and router is 192.168.0.1. IPCONFIG/ALL gives me:

Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : NVIDIA nForce MCP Networking Controller
Physical Address. . . . . . . . . : xx-yy-zz-aa-bb-cc
Dhcp Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IP Address. . . . . . . . . . . . : 192.168.0.2
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.0.1
DHCP Server . . . . . . . . . . . : 192.168.0.1
DNS Servers . . . . . . . . . . . : 192.168.0.1
Lease Obtained. . . . . . . . . . : 19 November 2006 09:23:22
Lease Expires . . . . . . . . . . : 20 November 2006 09:23:22

From the DI624 manual: (ftp://ftp.dlink.com/Gateway/di624_revC/Manual/di624_manual_106.zip)

Set the Primary DNS to be the same as the LAN IP address of your router (192.168.0.1).
The Secondary DNS is not needed or enter a DNS server from your ISP.

The strange bit for me remains this

dns servers: 192.168.1.9
64.245.166.16

That just ain't going to work? 192.168.1.9 is local but on a different subnet, and 64.245.166.16 doesn't respond if I ping it, nor does it turn up any results in a Google search.

Would help if you can answer the outstanding question "what happens if you ping www.pprune.org" ... seems to me that the PC is connected to the internet and can ping PPRuNe's IP address but isn't going to ping PPRuNe's URL as the DNS server is incorrectly set.

What happens if you run your browser and then enter the address http://213.161.73.143 ... does that get you to PPRuNe?

Given that everything seems to be set to Automatic, need to understand how that 192.168.1.9 got into the DNS Server entry ... think it's wrong.

In another post you have the laptop with 192.168.0.102!!!!

That would definitely be a problem if both were on 192.168.0.102 at the same time! However if they are both set up for DHCP and used one at a time then the DHCP server could legitimately have given them both 192.168.0.2 at different times without any conflict occurring.

RC

[Saab Dastard]

However if they are both set up for DHCP and used one at a time then the DHCP server could legitimately have given them both 192.168.0.2 at different times without any conflict occurring.

Check the lease on the IP address...

[rotorcraig]

Hmmm ... confusing.

Can't get away from thinking that DNS entry 192.168.1.x isn't going to work.

But can't think where it could be hard coded ... especially as this was all working until recently.

RC

[bolumenb]

Let me try and answer your questions/comments a bit at a time:

3) ping 192.168.0.102 - request timed out - 4x

In a post above you said that 192.168.0.102 was the address of your PC - yet you now find that you can't ping it????

In another post you have the laptop with 192.168.0.102!!!!

If 2 nodes on the network have the same IP address you are going to have problems.

You haven't indicated what happens when you ping www.pprune.org (http://www.pprune.org)

I indicated this in an earlier reply. All I get is a black screen.

What happens if you connect your laptop to the router with the LAN cable and switch off the wireless adapter? What IPCONFIG /all settings do you get? Can you access the internet from the laptop?

Actually the IPCONFIG /all I sent from my laptop was hooked up to the router with the cable as I thought this would have been more pertinent. Do you need see the laptop without the Ethernet cable hooked up and only wireless?
SD

[bolumenb]

What happens if you run your browser and then enter the address http://213.161.73.143 (http://213.161.73.143/) ... does that get you to PPRuNe?

I cannot run browser as it does not connect to the internet-I get "Internet Explorer cannot display the webpage"
If you meant to do a "ping" then it states "Ping request could not find host http://213.161.73.143 (http://213.161.73.143). Please check the name and try again."

[bolumenb]

Let me try posting again what I get from my desktop (which is not able to connect to Internet).
WINDOWS IP CONFIGURATION
Mode type:hybrid
IP Routing enabled: NO
WINS Proxy enabled: No
DNS Suffix search list: cpe.wadsnet.com

Ethernet adapter local area connection:
connection specific dns suffix: cpe.wadsnet.com
Description: Realtek RTL8139/810x family Fast Ethernet NIC
Phys Address: 00-0C-6E-46-84-40
Dhcp enabled: Yes
Autoconfig enabled: yes
IP Address: 192.168.0.101
Subnet Mask:255.255.255.0
Default Gateway: 192.168.0.1
dhcp server: 192.168.0.1
dns servers: 192.168.1.9
64.245.166.16
Lease obtained Sunday November 19, 2006
Lease expires Sunday November 26, 2006

Please note that the IP address above is 101 not 102 as I posted previously - I don't know if it was a typing error or it gave me 102 at the time.

[rotorcraig]

IP Address: 192.168.0.101Okay so either that was a typo yesterday, or DHCP is doing it's thing and giving you different IP Addresses to avoid conflicts.

I cannot run browser as it does not connect to the internet-I get "Internet Explorer cannot display the webpage"Yep, ignore that and type http://213.161.73.143 into the address bar anyway and press Enter!

You may find that PPRuNe (or part of it) appears ... in which case you are actually connected to the Internet but cannot resolve URLs (which is what DNS does). Alternatively the "Internet Explorer cannot display the webpage" message may remain?

As a double check, try the same test with http://66.102.9.104 which is the IP address for Google.

dns servers: 192.168.1.9
64.245.166.16Hmmm ... still there then, and I still don't like the look of that!

RC

[rotorcraig]

Another question ... try the following:


Start
Control Panel
Network Connections


Can you tell me what headings (eg Dial up, LAN or High Speed Internet) appear and the names of all of the icons under each heading?

RC

[bolumenb]

Another question ... try the following:


Start
Control Panel
Network ConnectionsCan you tell me what headings (eg Dial up, LAN or High Speed Internet) appear and the names of all of the icons under each heading?

1) 1394 connection /LAN/Connected,firewalled / 1394 Net Adapter
2) Local Area Connection / LAN / Connected, firewalled / Realtek RTL8139/810x family fast ethernet NIC

[rotorcraig]

Okay, and what when you enter the PPRuNe or Google IP addresses into your browser?

(even though it's giving the "cannot display" screen ... ignore that)

RC

[bolumenb]

Okay, and what when you enter the PPRuNe or Google IP addresses into your browser?

(even though it's giving the "cannot display" screen ... ignore that)

RC

That is all I get +
"Most likely causes: you are not connected to the internet / website is encountering problems / typing error"

I tried "diagnosing connection" via Network Diagnostics for Win XP and it states:
"There might be a problem with your modem and/or router. Turn off your modem and/or router. Check all of the cables between the modem and/or router and the phone or cable jack to assure they are plugged in."
Well I had tried all of this previously and my laptop works with the cable directly from the router so what now?

[bolumenb]

At the ethernet port on my computer, I have a constant green light and I have seen once in a while an intermittent yellow light (whatever that means) above the green light.

[Saab Dastard]

Release and renew your DHCP address - perhaps that will reset the correct DNS server.

IPCONFIG /RELEASE, then do IPCONFIG /RENEW.

If that fails, try setting the DNS server entry into your PC manually - 192.168.0.1, as per the laptop.

Please do a ping to www.pprune.org from a command window - the key question is whether or not it resolves the name to an IP address.

SD

[bolumenb]

On the HTTP / FTP Diagnostics, I get the same error message for HTTP, HTTPS and FTP as it states: Error 12007 connecting to www.microsoft.com (http://www.microsoft.com). The server name or address could not be resolved.
In addition it states that it could not make either an HTTP, HTTPS nor an FTP connection.

On the IP Configuration it states that: Valid IP address detected 192.168.0.101

Don't know if the above helps

[bolumenb]

I just made a mistake and clicked on "unsubscribe" on the email so hopefully someone can help me here.

Release and renew your DHCP address - perhaps that will reset the correct DNS server.

Completed

IPCONFIG /RELEASE, then do IPCONFIG /RENEW.

Gave me:
IP Address: 192.168.0.101
subnet mask: 255.255.255.0
default gateway: 192.168.0.101

If that fails, try setting the DNS server entry into your PC manually - 192.168.0.1, as per the laptop.
Please do a ping to www.pprune.org (http://www.pprune.org/forums/www.pprune.org) *from a command window* - the key question is whether or not it resolves the name to an IP address.

It states: ping request could not find host www.pprune.org (http://www.pprune.org). Please check the name and try again.

[rotorcraig]

and IPCONFIG /ALL now shows what?
RC

[tlf]

Have ye tried rebooting the router?
I have the same router and sometimes it needs a reboot although it's usually the wireless side which stops working for me.
After you reboot the router, reboot your PC.

Assuming you haven't already done it of course, it would be the first thing I'd try. :)

[bolumenb]

IP Config /all now shows

WINDOWS IP CONFIGURATION
Primary DNS Suffix:
Mode type:hybrid
IP Routing enabled: No
WINS Proxy enabled: No
DNS Suffix search list: cpe.wadsnet.com

Ethernet adapter local area connection:
connection specific dns suffix:
Description: Realtek RTL8139/810x family Fast Ethernet NIC
Phys Address: 00-0C-6E-46-84-40
Dhcp enabled: Yes
Autoconfig enabled: yes
IP Address: 192.168.0.101
Subnet Mask:255.255.255.0
Default Gateway: 192.168.0.1
dhcp server: 192.168.0.1
dns servers: 192.168.1.9
64.245.166.16
Lease obtained Sunday November 19, 2006
Lease expires Sunday November 26, 2006


Note the difference is on dns suffix which has zapped the "cpe.wadsnet.com" and put it on "search list". Why?

[bolumenb]

Have ye tried rebooting the router?
I have the same router and sometimes it needs a reboot although it's usually the wireless side which stops working for me.
After you reboot the router, reboot your PC.

I have unplugged both cable modem and router from power and left them off for a few minutes without any difference, besides my laptop is running off the router so it is my desktop.
I have also changed cables to no avail.

[rotorcraig]

You mentioned that you've got 2 Network Connections set up

1) 1394 connection /LAN/Connected,firewalled / 1394 Net Adapter
2) Local Area Connection / LAN / Connected, firewalled / Realtek RTL8139/810x family fast ethernet NIC

Are you sure that the 2nd one (Realtek RTL8139) is definitely set up for Auto DHCP, Auto DNS, nothing hard coded? And just to be sure, the first one too? No sign of the rogue 192.168.1.9 anywhere?

RC

[bolumenb]

Are you sure that the 2nd one (Realtek RTL8139) is definitely set up for Auto DHCP, Auto DNS, nothing hard coded? And just to be sure, the first one too? No sign of the rogue 192.168.1.9 anywhere?

For Realtek - under General Properties - TCP/IP, it states "Obtain an IP Address automatically"
"Use the following DNS server addresses :
Preferred: 192.168.1.9
Alternate: 64.245.166.16
Under Alternate Config, it states "Automatic Private IP address"

For 1394
Under General Properties: Obtain an IP address automatically
Obtain DNS server address automatically
Under Alternate Configuration: "Automatic Private IP Address"

Does that help or did I not answer your question? If you needed something else, please explain.

[rotorcraig]

Okay, your internet connection is trying to use the Realtek network connection and it is picking up the Preferred: 192.168.1.9 and Alternate: 64.245.166.16 - we can tell that from the following in your earlier post:

Ethernet adapter local area connection:
connection specific dns suffix:
Description: Realtek RTL8139/810x family Fast Ethernet NIC
Phys Address: 00-0C-6E-46-84-40
Dhcp enabled: Yes
Autoconfig enabled: yes
IP Address: 192.168.0.101
Subnet Mask:255.255.255.0
Default Gateway: 192.168.0.1
dhcp server: 192.168.0.1
dns servers: 192.168.1.9
64.245.166.16
Lease obtained Sunday November 19, 2006
Lease expires Sunday November 26, 2006Can you try putting the settings on the Realtek the same as are on the 1394:

Under General Properties: Obtain an IP address automatically
Obtain DNS server address automatically
Under Alternate Configuration: "Automatic Private IP Address"Reboot after the change if necessary. Does that make any difference?

RC

[bolumenb]

It is fixed! I happened to talk to someone this afternoon who is a software engineer and he came to my house and in less than 5 minutes, he fixed it.
I am not sure all he did in the few minutes but when he saw the dns servers: 192.168.1.9, he said that was not correct and he reset it and voila it hooked up to the internet right away.
Hopefully it will stay that way.
Thanks all of you for trying to help.

[rotorcraig]

Yep, think we got there at the same time.

Realtek network connection had 192.168.1.9 incorrectly hard coded.

Glad to have helped.

RC