Cannot view event log after changing administrator password

Symptoms

After you changed the administrator password on a 2003 server, you are unable to access some server information like the event logs.

Cause

When using Reset Password on Local Users and Groups, that may cause irreversible loss of information. You should use Ctrl+Alt+Del instead of Reset Password to change administrator password.

Acquiring network address

The NIC drops the connection occasionally.  

Symptoms

1. You keep losing the LAN and the Internet connection. When that happens, the LAN icon in the tray shows "Acquiring network address". The ipconfig command receives 0.0.0.0 IP address.

2. The NIC drops the connection occasionally.  

Possible solutions

1. Upgrade the NIC drive.

2. Re-configure the NIC speed and duplex.

3. Upgrade the router or switch firmware.

4. If it is wireless, it could be security settings issue. Try to re-create the wireless connection or change the SSID. 

Why the ipconfig shows 0.0.0.0 ip even you have assigned a static ip

Question

I have assigned a static ip, subnet to the computer, but the ipconfig shows IP address is 0.0.0.0 and subnet mask 0.0.0.0.. Why?

Answer

An existing IP address on the network has the same IP address. You may use tracert ip, WINS and DNS records to find out another computer using the same IP.

If your laptop users frequently disconnect from one network segment and reconnect to another network segment, they may not be able to access the second network. Resolution will be run ipconfig /registerdns.

Why do I get 169.254.x.x IP?

Symptom

The Internet Assigned Numbers Authority (IANA) has reserved 169.254.0.0-169.254.255.255 for Automatic Private IP Addressing. If the computer can't get ip from DHCP, APIPA provides an address that is guaranteed not to conflict with routable addresses.

Resolutions

1) Make sure you have good connection.

2) Check the hardware and settings.

3) Make sure the DHCP is working.

4) For the test, you can assign static ip. If static ip works, it is possible DHCP issue. If static ip doesn't work, check the hardware or connection.

5) WinSock2 stack may be corrupted and need to repair. 

Using the netsh command to prevent traffic from being passed by the network adapter

You can use netsh command to prevent traffic from being passed by the network adapter. To do that, you can use the Netsh to re-set a different IP address or default gateway , for example, netshell interface ip set address interface_name static ip_address subnet_mask default_gateway metric. 

Using the netsh command to change TCP/IP settings

With Windows 2000/XP/2003, you can use the netsh command to script the process of changing a computer TCP/IP setting withoutrebooting the computer.

Using the netsh command to prevent traffic from being passed by the network adapter

You can use netsh command to prevent traffic from being passed by the network adapter. To do that, you can use the Netsh to re-set a different IP address or default gateway , for example, netshell interface ip set address interface_name static ip_address subnet_mask default_gateway metric. 

Unexpected network failure or insufficient access or access is denied

Symptoms

when trying to use ipconfig /release or renew, you may receive the following message "The following error occurred when releasing adapter Local Area Connection: Unexpected network failure or insufficient access or access is denied"

Cause

You don't have permission to release or renew the IP.

The DHCP client has obtained an IP address that is already in use on the network

Symptom

When trying to renew IP, you may get this error "An error occurred while renewing the interface Local Area Connection:  The 

DHCP client has obtained an IP address that is already in use on the network. The local interface will be disabled until the DHCP client can obtain a new address."

Resolution

1. Release and the renew it.

2. Clean the internal DNS and WINS records.

Refer to case 083104LR

Some Win9x obtain different subnet mask

Symptoms: In your domain network, some computers (most are win9x) obtain mask 255.255.255.0 instead of 255.0.0.0 randomly and they can't logon to the Domain. IPCONFIG /renew doesn't fix the problem. If you assign static ip and correct mask, the computer will be able to logon without any problem. If you check the WINS, you may find many bad records.

Possible reasons: you may have another network device (possible a router) except main DHCP functions as a DHCP. 

Multiple IPs or subnets on one NIC

Q: Can I setup two IPs that belong to different subnets?

A: Yes, but you must use static IPs instead of DHCP and they must be in the same subnet. To do this, open the Properties of TCP/IP>Advanced, click Add to add IP addresses.

One-way ping only

If you can ping other computers and other computers can't ping your computer, this is often caused by an improperly configured firewall

on you computer. For example, ICF should not be enabled on LAN NIC.

Multiple IPs or subnets on one NIC

Q: Can I setup two IPs that belong to different subnets?

A: Yes, but you must use static IPs instead of DHCP and they must be in the same subnet. To do this, open the Properties of TCP/IP>Advanced, click Add to add IP addresses.

No operation can be performed on the adapter

Symptoms

when attempting to use ipconfig /release or renew command, you get "No operation can be performed on the adapter <xxxxx...> as this connection has its media/cable disconnected.

Causes

1. The network is up-plugged or no NIC. 

2. You are using static IP.

No IP while the network cable is disconnected

Symptoms: your computer has a static IP. However, the ipconfig shows no IP (Media State - Cable Disconnected) while the network cable is disconnected.

Cause: this is by design. If you have some software using TCP/IP whiteout connecting to a network, you may setup it manually.

No operation can be performed on the adapter

Symptoms

when attempting to use ipconfig /release or renew command, you get "No operation can be performed on the adapter <xxxxx...> as this connection has its media/cable disconnected.

Causes

1. The network is up-plugged or no NIC. 

2. You are using static IP.

IP address conflicts

SYMPTOMS

when trying to set the IP address on a NIC,  you may receive the following error message: "The IP address XXX.XXX.XXX.XXX you have entered for this network adapter is already assigned to another adapter Name of adapter. Name of adapter is hidden from the network and Dial-up Connections folder because it is not physically in the computer or is a legacy adapter that is not working. If the same address is assigned to both adapters and they become active, only one of them will use this address. This may result in incorrect system configuration. Do you want to enter a different IP address for this adapter in the list of IP addresses in the advanced dialog box? "

RESOLUTION

1. If you click Yes, you see the TCP/IP properties where you can change the IP address. Then assign the different IP.

2.  If you click No, the IP address is assigned to the network adapter. To resolve this problem, uninstall the ghosted network adapter from the registry:

At command prompt, type set devmgr_show_nonpresent_devices=1, and then press ENTER. Type Start DEVMGMT.MSC, and then press ENTER. Click View, and then click Show Hidden Devices. Expand the Network Adapters tree and right-click the dimmed network adapter, and then click Uninstall.

Host is unreachable

Q: When I ping the server using one of the clients it says the host is unreachable. Why?

A: 1) Make sure all machines are on the same local subnet and no routers in between.

2) Check the lmhosts file to make sure that you do not have an outdated file.

IP address conflicts

SYMPTOMS

when trying to set the IP address on a NIC,  you may receive the following error message: "The IP address XXX.XXX.XXX.XXX you have entered for this network adapter is already assigned to another adapter Name of adapter. Name of adapter is hidden from the network and Dial-up Connections folder because it is not physically in the computer or is a legacy adapter that is not working. If the same address is assigned to both adapters and they become active, only one of them will use this address. This may result in incorrect system configuration. Do you want to enter a different IP address for this adapter in the list of IP addresses in the advanced dialog box? "

RESOLUTION

1. If you click Yes, you see the TCP/IP properties where you can change the IP address. Then assign the different IP.

2.  If you click No, the IP address is assigned to the network adapter. To resolve this problem, uninstall the ghosted network adapter from the registry:

At command prompt, type set devmgr_show_nonpresent_devices=1, and then press ENTER. Type Start DEVMGMT.MSC, and then press ENTER. Click View, and then click Show Hidden Devices. Expand the Network Adapters tree and right-click the dimmed network adapter, and then click Uninstall.

Can't ping my own IP address

Failure to ping a computer's own IP address is most likely caused by a firewall program or improperly configured.

Can't obtain/renew IP addresses from the DHCP server

Symptoms

1) you have a DHCP client which may not be able to obtain/renew IP addresses from the DHCP server intermittently. 

2) after setup a workstation to obtain an IP address from DHCP, the machine can't ping others and ipconfig /all shows Autoconfiguration IP Address. . . :

169.254.x.x.

Resolutions

1) If this is XP, obtain the latest service pack for Windows XP.

2) Use the Network Diagnostics tool to identify any failed settings. To do this, go to Help and Support>Use Tools to view your computer information and diagnose problems>Network Diagnostics>Scan your system. When the process finishes, check for any items marked "FAILED" in red, expand those categories, and view the additional details about what the testing showed.

3) Assign a static ip on the client and ping the DHCP server. If you can't  ping the DHCP server, check the connection and hardware.

4) If you can ping the DHCP after assigning static ip, check the DHCP settings.

5) Make sure no firewall is running on your LAN.

6) Run Repair this connection if it is XP. Or use netsh to reset TCP/IP configuration.

7) If it is win98/w2k, remove and reinstall TCP/IP.

8) Try to upgrade the new NIC driver.

9) Make sure you don't run out of IPs in the DHCP scope.

10) If you use a router as DHCP, you may want to upgrade the firmware.

11) Modify hardware settings such as speed and duplex.

12) Make sure hardware Mac control enable.

Can ping IP but not hostname after installed/upgraded software

Cause

The may modify the networking configuration in registry.

Can receive IP packets but not send them

Symptoms

When using ipconfig command, you may have no IP address or no Automatic Private IP Addressing (APIPA) address. You may be receiving IP packets but not sending them.

Cause

These issues may occur if the Winsock registry keys are damaged or corrupted. 

Can ping ip but not name

I have a situation here where I could ping an IP of a computer but how come I couldn't ping with its computer name?

1. Incorrect WINS and DNS settings.

2. Incorrect TCP/IP settings

3. Check lmhosts and hosts files

An error occurred while renewing interface

Symptoms When trying to release and renew the IP address using the Ipconfig command, you may receive the following error message: “An error occurred while renewing interface 'Internet': An operation was attempted on something that is not a socket.”

Cause

1. These issues may occur if the Winsock registry keys are damaged or corrupted.

2. To release or renew the IP, you must be administrator or member of the administrators.

3. It could be the hardware settings.

How to fix Winsock2 corruption issue - Symptoms

Symptoms of Winsock2 corruption

1. When running ipconfig /release or renew, you may receive the following error message: An error occurred while renewing interface 'Internet': An operation was attempted on something that is not a socket.

2. Ipconfig /all doesn't list  IP address or no Automatic Private IP Addressing (APIPA) address.

3  The status of the LAN Connection displays receiving IP packets but not sending them.

4. When you use your computer, you may receive the following error message: Initialization function INITHELPERDLL in IPMONTR.DLL failed to start with error code 10107.

5. When you use the ipconfig /renew command, you may receive the following error messages: 1) Unable to contact driver Error code 2. 2) The operation failed since no adapter is in the state permissible for this operation. 3) The attempted operation is not supported for the type of object referenced.

6. In the Device Manager, when you click Show Hidden Devices, the TCP/IP Protocol Driver is listed as disabled under Non-Plug and Play drivers, and you receive error code 24.

7. When you create a dial-up connection, you may receive the following error message: Error 720: No PPP Control Protocols Configured.

An error occurred while renewing interface local area connection

Q1:  I received the following error message when i run the command ipconfig   /renew on Windows XP system.  "An error occurred while renewing interface local area connection: Access is denied."

I run the command using Domain admin but yet still get the same error message but i still able to get the dhcp ip after few minutes. Anyone, please advice any possible cause that will bring up this error message. Many thanks in advance

A1: Winsock registry keys may be  damaged. Check this page for details,

Ipconfig

Symptom: When trying to renew IP, you may get this error "An error occurred while renewing the interface Local Area Connection: …

Q2: Hi Robert,

Thanks for the reply. I found the error occur because of the misconfiguration on the core switch. 

Seem like the client DHCP discovery packets was broadcast to another vlan
and rejected by the DHCP server.

A2: Thank you for the update. I saw another similar post like yours. I should add it to my database.

Using ipconfig /all or winipcfg

When troubleshooting a TCP/IP networking problem, you can use the ipconfig command to get host computer configuration information, including the IP address, subnet mask, and default gateway. If it is running Win9x, ME, use winipcfg instead.

Can’t access Server 2003

Situation: The server 2003 can ping and access any computers in the LAN while no computers can access the server and ping it.

Troubleshooting: 

1. Make sure No firewall running.

2. Make sure the ISA is disabled.

3. Make sure no IP filtering is enabled.

4. The server can ping it self.

5. Network Monitor displays that the NIC receiving and sending packets.

6. RRAS displays a red narrow down icon and Services show the RRAS is not running

Resolution: Enable and start RRAS and ISA. Note: the ISA must be started (if the ISA is installed) when starting RRAS.