[davidpreston2]

I have two laptops - Dell 1545 and an Acer5633. Both use Vista. I have been connecting via an ad hoc network and through the Acer to the Internet. Suddenly they could no longer connect to each other after three days with no problem. Each computer can individually connect to the Internet, but not via the other. I have tried turning off the broadband modem. Tried creating a new network. Checked that internet sharing is allowed. Any help?

[JohnWill]

Turn off any firewalls for debugging. If the firewall is the problem, you'll have to configure it to allow access to "trusted zone" addresses. Note that some firewalls must be completely uninstalled to stop them from affecting your networking.

Hold the Windows key and press R, then type CMD to open a command prompt.

In the command prompt window that opens, type type the following commands:

PING each remote computer by IP address, and if successful, PING by name. Open a command prompt as described above and type.

PING <ip address>
or
PING <computer name>

Where:
<ip address> - is the x.x.x.x IP address
<computer name> - is the computer name

A failure to PING is almost always a firewall configuration issue. Any failure to PING needs to be corrected before you go any farther.

Note: You can obtain the IP address and computer name of a computer by opening a command prompt (DOS window) and typing IPCONFIG /ALL. This should work for any Windows version. The IPCONFIG /ALL display will provide a wealth of useful information for debugging your network connection.

Check your Services are Started on all PCs:

• COM+ Event System (for WZC issues)
• Computer Browser
• DHCP Client
• DNS Client
• Network Connections
• Network Location Awareness
• Remote Procedure Call (RPC)
• Server
• TCP/IP Netbios helper
• Wireless Zero Configuration (XP wireless configurations)
• WLAN AutoConfig (Vista wireless configurations)
• Workstation

Note: You can check the services in Control Panel, Administrative Tools, Services.

All of these services should be started, and their startup type should be automatic.

If a service is not running, open it's properties and check the dependencies. Check each of the dependencies and see which one is preventing the service from running. Checking the event log is also a good idea here, there may be clues to what is failing.


All computers should be in the same workgroup for computer browsing to function properly. File & Print Sharing has to be enabled on any computer you wish to share files or printers from. You also need to actually share the resource in question from My Computer, right click on the drive/printer/folder, and select sharing.

If you encounter difficulties accessing computers that are visible in Network Places (Network and Sharing Center in Vista), make sure the computer being accessed has an account with the same name/password as the system connecting to it uses to login. NOTE: Vista's default is to require a password on the account to enable file/print sharing.

While the default NetBIOS setting is correct for normal network configurations, it's possible for it to be altered, and it costs nothing to make sure it's correct. NETBIOS over TCP/IP must be enabled for normal network browsing. You can open a command prompt as described above and type the following command: nbtstat -n. This will display the status of NetBIOS or indicate it's not configured.

[davidpreston2]

Thanks for the reply. Am in India at the moment so different time zones and a day's work ahead. Will contact you again when I have run through this and let you know the outcome. Thanks again for your time.

David

[davidpreston2]

Attempted to connect the two laptops and both computers say they are connected, but they aren't really.

Tried pinging from one computer with internet connection

Says the destination host unreachable

From the other laptop it says the transmit failed error code 1231. Can't find what this means.

All the services you detailed are started.

Why when the networking was working would it suddenly stop - the firewalls have not changed and McAfee just does its normal job.

I have a suspicion that some Windows update is the problem but I can't system restore far enough back.

Any further help very welcome

David

[JohnWill]

Let's see this from each of the computers.


Hold the Windows key and press R, then type CMD to open a command prompt:

In the command prompt window that opens, type type the following commands, one at a time, followed by the Enter key:

Note that there is a space before the -n or the /ALL, but there is NOT a space after the - or / in the following commands.

NBTSTAT -n

IPCONFIG /ALL

Right click in the command window and choose Select All, then hit Enter to copy the contents to the clipboard.
Paste the results in a message here.

If you are on a machine with no network connection, use a floppy, USB disk, or a CD-RW disk to transfer a text file with the information to allow pasting it here.

[davidpreston2]

You should have got two screen dumps from each computer. They diappeared when i sent them. Please let me know if you did not receive them

David

[davidpreston2]

Microsoft Windows [Version 6.0.6001]
Copyright (c) 2006 Microsoft Corporation. All rights reserved.

C:\Users\David Preston>nbtstat -n

Local Area Connection:
Node IpAddress: [192.168.1.2] Scope Id: []

NetBIOS Local Name Table

Name Type Status
---------------------------------------------
DAVIDPRESTON-PC<00> UNIQUE Registered
WORKGROUP <00> GROUP Registered
WORKGROUP <1E> GROUP Registered
DAVIDPRESTON-PC<20> UNIQUE Registered
WORKGROUP <1D> UNIQUE Registered
..__MSBROWSE__.<01> GROUP Registered

Wireless Network Connection:
Node IpAddress: [0.0.0.0] Scope Id: []

No names in cache

C:\Users\David Preston>

Microsoft Windows [Version 6.0.6001]
Copyright (c) 2006 Microsoft Corporation. All rights reserved.

C:\Users\David Preston>nbtstat -n

Local Area Connection:
Node IpAddress: [192.168.1.2] Scope Id: []

NetBIOS Local Name Table

Name Type Status
---------------------------------------------
DAVIDPRESTON-PC<00> UNIQUE Registered
WORKGROUP <00> GROUP Registered
WORKGROUP <1E> GROUP Registered
DAVIDPRESTON-PC<20> UNIQUE Registered
WORKGROUP <1D> UNIQUE Registered
..__MSBROWSE__.<01> GROUP Registered

Wireless Network Connection:
Node IpAddress: [0.0.0.0] Scope Id: []

No names in cache

C:\Users\David Preston>

C:\Users\David Preston>ipconfig /all

Windows IP Configuration

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

Wireless LAN adapter Wireless Network Connection:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Dell Wireless 1397 WLAN Mini-Card
Physical Address. . . . . . . . . : 00-22-5F-E1-98-51
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes

Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Marvell Yukon 88E8040 PCI-E Fast Ethernet
Controller
Physical Address. . . . . . . . . : 00-25-64-48-33-34
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::c164:11ee:2bb2:899a%11(Preferred)
IPv4 Address. . . . . . . . . . . : 192.168.1.2(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : 31 October 2009 00:25:57
Lease Expires . . . . . . . . . . : 01 November 2009 00:25:56
Default Gateway . . . . . . . . . : 192.168.1.1
DHCP Server . . . . . . . . . . . : 192.168.1.1
DHCPv6 IAID . . . . . . . . . . . : 251667812
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-12-12-FD-55-00-25-64-48-33-34

DNS Servers . . . . . . . . . . . : 192.168.1.1
NetBIOS over Tcpip. . . . . . . . : Enabled

Tunnel adapter Local Area Connection* 6:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : isatap.{0E52C96F-02B5-458B-9640-0D13213EE
99B}
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

Tunnel adapter Local Area Connection* 7:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface
Physical Address. . . . . . . . . : 02-00-54-55-4E-01
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
IPv6 Address. . . . . . . . . . . : 2001:0:cf2e:3096:3068:9e6:3f57:fefd(Prefe
rred)
Link-local IPv6 Address . . . . . : fe80::3068:9e6:3f57:fefd%10(Preferred)
Default Gateway . . . . . . . . . : ::
NetBIOS over Tcpip. . . . . . . . : Disabled

Tunnel adapter Local Area Connection* 11:

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

Tunnel adapter Local Area Connection* 12:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : isatap.{61E86806-6F90-4CA9-9531-16345835E
C19}
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

C:\Users\David Preston>

[davidpreston2]

Microsoft Windows [Version 6.0.6001]
Copyright (c) 2006 Microsoft Corporation. All rights reserved.

C:\Users\Janet Kay>nbtstat -n

Local Area Connection:
Node IpAddress: [192.168.1.3] Scope Id: []

NetBIOS Local Name Table

Name Type Status
---------------------------------------------
JANETKAY-LAPTOP<00> UNIQUE Registered
WORKGROUP <00> GROUP Registered
JANETKAY-LAPTOP<20> UNIQUE Registered
WORKGROUP <1E> GROUP Registered
WORKGROUP <1D> UNIQUE Registered
..__MSBROWSE__.<01> GROUP Registered

Wireless Network Connection:
Node IpAddress: [0.0.0.0] Scope Id: []

No names in cache

C:\Users\Janet Kay>

Microsoft Windows [Version 6.0.6001]
Copyright (c) 2006 Microsoft Corporation. All rights reserved.

C:\Users\Janet Kay>nbtsta -n
'nbtsta' is not recognized as an internal or external command,
operable program or batch file.

C:\Users\Janet Kay>nbtstat -n

Local Area Connection:
Node IpAddress: [192.168.1.3] Scope Id: []

NetBIOS Local Name Table

Name Type Status
---------------------------------------------
JANETKAY-LAPTOP<00> UNIQUE Registered
WORKGROUP <00> GROUP Registered
JANETKAY-LAPTOP<20> UNIQUE Registered
WORKGROUP <1E> GROUP Registered
WORKGROUP <1D> UNIQUE Registered
..__MSBROWSE__.<01> GROUP Registered

Wireless Network Connection:
Node IpAddress: [0.0.0.0] Scope Id: []

No names in cache

C:\Users\Janet Kay>ipconfig /all

Windows IP Configuration

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

Wireless LAN adapter Wireless Network Connection:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Intel(R) PRO/Wireless 3945ABG Network Con
nection
Physical Address. . . . . . . . . : 00-18-DE-E1-40-87
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes

Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Broadcom 440x 10/100 Integrated Controlle
r
Physical Address. . . . . . . . . : 00-16-D4-B0-89-F6
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::a1ab:f09b:509d:cec7%8(Preferred)
IPv4 Address. . . . . . . . . . . : 192.168.1.3(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : 30 October 2009 23:59:46
Lease Expires . . . . . . . . . . : 31 October 2009 23:59:47
Default Gateway . . . . . . . . . : 192.168.1.1
DHCP Server . . . . . . . . . . . : 192.168.1.1
DNS Servers . . . . . . . . . . . : 192.168.1.1
NetBIOS over Tcpip. . . . . . . . : Enabled

Tunnel adapter Local Area Connection* 6:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : isatap.{F2518421-EDEF-4FF0-A1DD-B0B58595E
8F0}
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

Tunnel adapter Local Area Connection* 9:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface
Physical Address. . . . . . . . . : 02-00-54-55-4E-01
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
IPv6 Address. . . . . . . . . . . : 2001:0:cf2e:3096:1cfd:23d0:3f57:fefc(Pref
erred)
Link-local IPv6 Address . . . . . : fe80::1cfd:23d0:3f57:fefc%10(Preferred)
Default Gateway . . . . . . . . . : ::
NetBIOS over Tcpip. . . . . . . . : Disabled

Tunnel adapter Local Area Connection* 13:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : isatap.{439D2219-93AD-495A-AD91-5D24CD231
645}
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

Tunnel adapter Local Area Connection* 15:

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

C:\Users\Janet Kay>

[JohnWill]

Both of them think they're the master browser. This is almost always a firewall blocking access. Try disabling ALL firewalls and see if you can connect.

I'd also like to you try to ping each way by name



From the DavidPreston-PC machine, do this.

Start, Run, CMD <enter>

PING JanetKay-Laptop



From the JanetKay-Laptop machine, do this.

Start, Run, CMD <enter>

PING DavidPreston-PC



Post the results of the pings here.

[davidpreston2]

Can ping successfully after disabling both firewalls but cannot connect

Microsoft Windows [Version 6.0.6001]
Copyright (c) 2006 Microsoft Corporation. All rights reserved.


With McAfee and Windows Firewall disabled

Microsoft Windows [Version 6.0.6001]
Copyright (c) 2006 Microsoft Corporation. All rights reserved.

C:\Users\David Preston>ping JANETKAY-LAPTOP

Pinging JanetKay-Laptop [fe80::7079:11e1:8e52:e7b7%12] from fe80::41b:c678:e95b:
27a5%12 with 32 bytes of data:
Reply from fe80::7079:11e1:8e52:e7b7%12: time=1ms
Reply from fe80::7079:11e1:8e52:e7b7%12: time=1ms
Reply from fe80::7079:11e1:8e52:e7b7%12: time=1ms
Reply from fe80::7079:11e1:8e52:e7b7%12: time=1ms

Ping statistics for fe80::7079:11e1:8e52:e7b7%12:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 1ms, Maximum = 1ms, Average = 1ms

C:\Users\David Preston>

C:\Users\Janet Kay>ping DavidPreston-PC

Pinging DavidPreston-PC [fe80::41b:c678:e95b:27a5%9] from fe80::7079:11e1:8e52:e
7b7%9 with 32 bytes of data:
Reply from fe80::41b:c678:e95b:27a5%9: time=1ms
Reply from fe80::41b:c678:e95b:27a5%9: time=1ms
Reply from fe80::41b:c678:e95b:27a5%9: time=1ms
Reply from fe80::41b:c678:e95b:27a5%9: time=1ms

Ping statistics for fe80::41b:c678:e95b:27a5%9:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 1ms, Maximum = 1ms, Average = 1ms

C:\Users\Janet Kay>

[JohnWill]

Disable IPv6 on both of these machines.


Disable IPv6:

1. Hold the Windows key and type R, enter "ncpa.cpl" (without the quotes) and press Enter
2. Right click on each network connection and select "Properties"
3. Remove the checkmark from the box next to "Internet Protocol Version 6 (TCP/IPv6)
4. Click OK to exit the dialog

NOTE: You should do this for each network connection.


Post the results of the ping tests again.

[davidpreston2]

After unchecking IP6 on both laptops

Microsoft Windows [Version 6.0.6001]
Copyright (c) 2006 Microsoft Corporation. All rights reserved.

C:\Users\David Preston>ping JANETKAY-LAPTOP

Pinging JANETKAY-LAPTOP [169.254.231.183] with 32 bytes of data:
Request timed out.
Request timed out.
Request timed out.
Request timed out.

Ping statistics for 169.254.231.183:
Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),

C:\Users\David Preston>

After unchecking IP6 and disabling McAfee and Windows Firewall on both laptops
Microsoft Windows [Version 6.0.6001]
Copyright (c) 2006 Microsoft Corporation. All rights reserved.

C:\Users\David Preston>ping JANETKAY-LAPTOP

Pinging JANETKAY-LAPTOP [169.254.231.183] with 32 bytes of data:
Reply from 169.254.231.183: bytes=32 time=2ms TTL=128
Reply from 169.254.231.183: bytes=32 time=2ms TTL=128
Reply from 169.254.231.183: bytes=32 time=2ms TTL=128
Reply from 169.254.231.183: bytes=32 time=2ms TTL=128

Ping statistics for 169.254.231.183:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 2ms, Maximum = 2ms, Average = 2ms

C:\Users\David Preston>

After unchecking IP6 on both laptops


Microsoft Windows [Version 6.0.6001]
Copyright (c) 2006 Microsoft Corporation. All rights reserved.

C:\Users\Janet Kay>ping DavidPreston-PC

Pinging DavidPreston-PC [169.254.39.165] with 32 bytes of data:
Request timed out.
Request timed out.
Request timed out.
Request timed out.

Ping statistics for 169.254.39.165:
Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),

C:\Users\Janet Kay>

After disabling McAfee and Windows Firewall & unchecking IP6 on both laptops

Microsoft Windows [Version 6.0.6001]
Copyright (c) 2006 Microsoft Corporation. All rights reserved.

C:\Users\Janet Kay>ping DAVIDPRESTON-PC

Pinging DavidPreston-PC [169.254.39.165] with 32 bytes of data:
Request timed out.
Request timed out.
Request timed out.
Request timed out.

Ping statistics for 169.254.39.165:
Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),

C:\Users\Janet Kay>

[JohnWill]

Well, the DavidPreston-PC is not getting an IP address.


TCP/IP stack repair options for use with Vista or Windows 7.

Start, All Programs\Accessories and right click on Command Prompt, select "Run as Administrator" to open a command prompt.

In the command prompt window that opens, type type the following commands, each followed by the Enter key:

Reset WINSOCK entries to installation defaults: netsh winsock reset catalog

Reset IPv4 TCP/IP stack to installation defaults. netsh int ipv4 reset reset.log

Reset IPv6 TCP/IP stack to installation defaults. netsh int ipv6 reset reset.log

Reboot the machine.

[davidpreston2]

Sorry even after all that there is still no connection.

Is there anything further I can do. Thanks for sticking with me

David

[JohnWill]

Well, the 169.254.x.x address of the one indicates you have no connection with that machine. Obviously, that machine also doesn't have Internet access either.

Not sure what happened there, it was connected in your previous post, what changed?