[kneurotik]

Hi there,

I am running Vista on my laptop and have been getting frequent disconnects from the Internet. The phone line goes to the modem, which leads directly to laptop. No wireless network.

I used to get the error message "Cannot communicate with primary DNS server 192.168.1.254" when I Diagnose and Repair under Network and Sharing Centre in the Control Panel. The problem is sometimes resolved by selecting "Reset the network adapter local area connection."

However, the problem seems to be worse now as this option doesn't work at times. Power cycling the modem does not always help. Rebooting does not always help. I have not figured out the pattern, but sometimes one of these solutions still works. There are times when nothing works and I have to give up.

I ran IPCONFIG /ALL as it seems like others on the web who have the same problem were told to do it.

Hope to get some help, as I am clueless when it comes to network problems.

Windows IP Configuration

Host Name . . . . . . . . . . . . : Kenji-PC
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No

Ethernet adapter Bluetooth Network Connection:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Bluetooth Device (Personal Area Network)
Physical Address. . . . . . . . . : 00-1A-92-C6-38-1F
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes

Wireless LAN adapter Wireless Network Connection:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Intel® PRO/Wireless 3945ABG Network Con
nection
Physical Address. . . . . . . . . : 00-1B-77-09-CA-4E
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes

Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Realtek RTL8168B/8111B Family PCI-E GBE N
IC
Physical Address. . . . . . . . . : 00-1A-92-EF-D8-CB
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::3c4e:92e8:3183:8ae1%8(Preferred)
IPv4 Address. . . . . . . . . . . : 192.168.1.100(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : Monday, 10 May 2010 4:50:12 PM
Lease Expires . . . . . . . . . . : Monday, 17 May 2010 4:50:12 PM
Default Gateway . . . . . . . . . : 192.168.1.254
DHCP Server . . . . . . . . . . . : 192.168.1.254
DNS Servers . . . . . . . . . . . : 192.168.1.254
NetBIOS over Tcpip. . . . . . . . : Enabled

Tunnel adapter Local Area Connection* 6:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft ISATAP Adapter
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

Tunnel adapter Local Area Connection* 7:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : isatap.{1B52335D-31A0-443A-905C-7DE51488E
3E4}
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

Tunnel adapter Local Area Connection* 11:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface
Physical Address. . . . . . . . . : 02-00-54-55-4E-01
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

Tunnel adapter Local Area Connection* 12:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : isatap.{624E4B23-6625-44D6-997C-81A5915E5
43A}
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

Tunnel adapter Local Area Connection* 19:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : 6TO4 Adapter
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

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kneurotik-

I'm assuming you are using a wireless router.

• What is the make and model of the router?
• How many computers do you have on your network?
• Is your network password-protected? What encryption key do you use?

If you're not sure about the answers, that's fine. We'll just do a little digging.

Edited by FNP, 10 May 2010 - 08:03 AM.

[FNP]

kneurotik-

I'm assuming you are using a wireless router.

• What is the make and model of the router?
• How many computers do you have on your network?
• Is your network password-protected? What encryption key do you use?

If you're not sure about the answers, that's fine. We'll just do a little digging.

Edited by FNP, 10 May 2010 - 08:03 AM.

[kneurotik]

Hi FNP,

Thanks for responding to my request for help. I am not using a wireless router. It is a phone line-modem-ethernet cable-laptop setup.

What is the make and model of the router?
Open networks iConnect 622 modem.

How many computers do you have on your network?
Only 1 laptop.

Is your network password-protected? What encryption key do you use?
No password protection.

[FNP]

Right. I misread your post. Silly me.

• Open up the Network and Sharing Center and click on Change Adapter Settings located on the right of the screen.
• Right-click on the active link (it should be Local Area Connection) and select Properties.
• Where it says, "This connection uses the following items", highlight Internet Protocol Version 4 (TCP/IPv4) and select Properties.
• This will bring up another dialog box with several groups of radio buttons. The options Obtain IP address automatically and Obtain DNS server automatically should be selected; if they are not, select these and try your internet connection again.

[kneurotik]

Yes, Obtain IP address and DNS server are already set at automatic (they have been at that setting all this while).

[diabillic]

Can you ping the DNS?

[kneurotik]

Yes, DNS could be ping-ed. 4 packets sent and 4 packets received. 0% loss.

[diabillic]

Any firewall running?

[kneurotik]

Yes, PC Tools Firewall Plus version 2.0.0.25

[diabillic]

Disable it and try again. Also, make sure your Windows firewall is off to avoid any conflicts.

[kneurotik]

You mean to disable PC Tools Firewall and try to ping again?

Did so and the results are the same- 4 packets sent and 4 packets received.

[diabillic]

Try booting with all non microsoft services disabled.

[kneurotik]

Right. Am gonna need help with this- how do I actually do that?

[FNP]

• Go to Start > Run and type msconfig.
• Select the Startup tab.
• Select disable all.

[kneurotik]

Thanks for that. I have three questions:

1) Do I try that now, when the Internet connectivity is not a problem, and wait for the problem to occur? Or do I try that only when the Internet gets disconnected?

2) Disabling the items in the startup list would include disabling antivirus and firewalls- how safe will this be if I were to wait and see if disabling the items helps conenctivity?

3) Among the list of items in that startup list, there are also microsoft ones. Should I enable these?