Test-DnsServer
Tests that a specified computer is a functioning DNS server.
Syntax
Test-DnsServer
[-IPAddress] <IPAddress[]>
[-ComputerName <String>]
[[-Context] <String>]
[-CimSession <CimSession[]>]
[-ThrottleLimit <Int32>]
[-AsJob]
[<CommonParameters>] Test-DnsServer
[-IPAddress] <IPAddress[]>
[-ComputerName <String>]
-ZoneName <String>
[-CimSession <CimSession[]>]
[-ThrottleLimit <Int32>]
[-AsJob]
[<CommonParameters>] Description
The Test-DnsServer cmdlet tests whether a computer is a functioning Domain Name System (DNS) server. The DNS server must be running Windows Server® 2008 R2 operating system or above.
When you specify a computer by its IP address only, the cmdlet tests whether the computer is a DNS server. If you also specify a zone name, the cmdlet validates that the DNS server can resolve the specified zone.
Examples
Example 1: Test whether a DNS server is functional
PS C:\> Test-DnsServer -IPAddress 10.123.183.155
IPAddress Result RoundTripTime TcpTried UdpTried
--------- -------- ------------ -------- --------
10.123.183.155 Success 00:00:11 False TrueThis command tests whether the computer that has an IP address of 10.123.183.155 is a functional DNS server.
Example 2: Test whether a DNS server is functional and has valid configured forwarders
PS C:\> Test-DnsServer -IPAddress 10.123.183.155 -Context Forwarder
IPAddress Result RoundTripTime TcpTried UdpTried
--------- -------- ------------ -------- --------
10.123.183.155 Success 00:00:11 False TrueThis command tests whether the computer that has an IP address of 10.123.183.155 is a functional DNS server that has valid configured forwarders.
Example 3: Test whether a DNS server is functional and has valid configured root hints
PS C:\> Test-DnsServer -IPAddress 10.123.183.155 -Context RootHints
IPAddress Result RoundTripTime TcpTried UdpTried
--------- -------- ------------ -------- --------
10.123.183.155 NoResponse 00:00:12 False TrueThis command tests whether the computer that has an IP address of 10.123.183.155 is a functional DNS server that has valid configured root hints.
Example 4: Test whether a DNS server is functional and hosts the Contoso.com zone
PS C:\> Test-DnsServer -IPAddress 10.123.183.155 -ZoneName "Contoso.com"
IPAddress Result RoundTripTime TcpTried UdpTried
--------- -------- ------------ -------- --------
10.123.183.155 Success 00:00:00 False TrueThis command tests whether the computer that has an IP address of 10.123.183.155 is a functional DNS server that hosts the Contoso.com zone.
Parameters
-AsJob
Runs the cmdlet as a background job. Use this parameter to run commands that take a long time to complete.
The cmdlet immediately returns an object that represents the job and then displays the command prompt.
You can continue to work in the session while the job completes.
To manage the job, use the *-Job cmdlets.
To get the job results, use the Receive-Job cmdlet.
For more information about Windows PowerShell background jobs, see about_Jobs.
| Type: | SwitchParameter |
| Position: | Named |
| Default value: | None |
| Required: | False |
| Accept pipeline input: | False |
| Accept wildcard characters: | False |
-CimSession
Runs the cmdlet in a remote session or on a remote computer. Enter a computer name or a session object, such as the output of a New-CimSession or Get-CimSession cmdlet. The default is the current session on the local computer.
| Type: | CimSession[] |
| Aliases: | Session |
| Position: | Named |
| Default value: | None |
| Required: | False |
| Accept pipeline input: | False |
| Accept wildcard characters: | False |
-ComputerName
Specifies a DNS server. The acceptable values for this parameter are: an IPv4 address; an IPv6 address; any other value that resolves to an IP address, such as a fully qualified domain name (FQDN), host name, or NETBIOS name.
| Type: | String |
| Aliases: | Cn |
| Position: | Named |
| Default value: | None |
| Required: | False |
| Accept pipeline input: | False |
| Accept wildcard characters: | False |
-Context
Specifies functionalities to test. Valid values are: DnsServer, Forwarder , and RootHints.
| Type: | String |
| Accepted values: | DnsServer, Forwarder, RootHints |
| Position: | 2 |
| Default value: | None |
| Required: | False |
| Accept pipeline input: | False |
| Accept wildcard characters: | False |
-IPAddress
Specifies an array of DNS server IP addresses.
| Type: | IPAddress[] |
| Position: | 1 |
| Default value: | None |
| Required: | True |
| Accept pipeline input: | True |
| Accept wildcard characters: | False |
-ThrottleLimit
Specifies the maximum number of concurrent operations that can be established to run the cmdlet.
If this parameter is omitted or a value of 0 is entered, then Windows PowerShell® calculates an optimum throttle limit for the cmdlet based on the number of CIM cmdlets that are running on the computer.
The throttle limit applies only to the current cmdlet, not to the session or to the computer.
| Type: | Int32 |
| Position: | Named |
| Default value: | None |
| Required: | False |
| Accept pipeline input: | False |
| Accept wildcard characters: | False |
-ZoneName
Specifies the name of the zone that the server hosts.
| Type: | String |
| Position: | Named |
| Default value: | None |
| Required: | True |
| Accept pipeline input: | True |
| Accept wildcard characters: | False |