Network troubleshooting commands for Windows

Article Number: 000003424
3424
Products: All
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Problem Description

I need a list of common Windows commands to help me troubleshoot Websense in my network.

Resolution

The Windows troubleshooting commands discussed in this document fall into three categories:
  • Determine which groups a user belongs
  • Helpful commands entered from the Start > Run dialog box
  • Comman-line tools for troubleshooting network connectivity


Determine which groups a user belongs

To generate a list of groups that a user belongs, open a command prompt and enter the following commands:

   net user <username> /domain

Replace <username> with an actual user name. For example:

   net user jdoe /domain


Helpful commands entered from the Start > Run dialog box

Select Start > Run to execute any of the following commands.

User-added image



 mstsc Opens the Remote Desktop (RDP) tool
 winmsd Opens the System Information dialog box
 inetcpl.cpil Opens the Internet Explorer Properties dialog box
 odbccp32.cpl Opens the ODBC Data Source Administrator
 mmc Opens the Microsoft Management Console (MMC)
 services.msc Opens the Windows Services dialog box
 eventvwr.msc Opens the Windows Event Viewer
 dsa.msc Opens the Active Directory User and Computers management console
 dssite.msc Opens the Active Directory Sites and Services management console
 adminpak.msi Launches the Administration Tools Pack installer
 dxdiag Opens the DirectX Diagnostic Tool
 \\< Name or IP>\C$ Opens a UNC to the C: share
 cmd Opens the Windows Command Prompt using the 32-bit cmd shell

 

Command-line tools for troubleshooting network connectivity

This list contains some common commands for troubleshooting network connectivity. Select Start > Run and then type cmd to access the appropriate command prompt. Activating a command window via Start > Programs > Accessories does not allow all of the following tools to run correctly.

User-added image




arp -a Shows gateway MAC address.
 gpresult Starts the Operating System Group Policy Result tool
 ipconfig /all Displays the full TCP/IP configuration for all adapters
 ipconfig /flushdns Flushes the DNS resolver cache. Helpful when troubleshooting DNS name resolution problems
 nbtstat -a <MachineName> Obtains info from WINS or LMHOST (discovers who is logged on)
 nbtstst -A <IP> Gets info from WINS or LMHOST (discovers who is logged on)
 nbtstat -R Purges and reloads the remote cache name table
 nbtstat -n Lists local NetBIOS names.
 nbtstat -r Useful for detecting errors when browsing WINS or NetBIOS
 netstat -ab The b switch links each used port with its application
 netstat -an Shows open ports
 netstat -an 1 | find "15868" Locates only lines with the number 15868 and redisplays every one second
 netstat -an | find "LISTENING" Shows open ports with LISTENING status
 net use  Retrieves a list of network connections
 net use file://1.2.3.4/ Sees if the machine can poll IP 1.2.3.4
 net user Shows user account for the computer
 net user /domain Displays user accounts for the domain
 net user /domain <UserName> Shows account details for specific user
 net group /domain Shows group accounts for the domain
 net view Displays domains in the network
 net view /domain Specifies computers available in a specific domain
 net view /domain: <DomainName> | more Shows user accounts from specific domain
 net view /cache  Shows workstation names
 nslookup Looks up IP/hostnames and displays information helpful in diagnosing DNS issues
 ping -a <IP> Resolves IP to Hostname
 ping -t <IP> Pings host until stopped
 set U Shows which user is logged on
 set L Shows the logon server
 telnet <IP> <port> Confirms whether the port is open
net use %LOGONSERVER%                     
  • Use this command to hit the Domain Controller resulting in DC Agent picking up the user name you logged onto the server with. An example of the command follows:
    • net use  \\<Domain Controller IP or Hostname>
 

Notes & Warnings

NOTESome commands may output more data then the default command window can show. To view the complete data, use the pipe command ( > or | ) to direct the output to a file. For example, type net user \domain > GroupOutPut.txt to create a text file called GroupOutPut.txt that contains the output data.

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