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How to retrive Primary Dns Suffix programmatically in c#?
C:\Users\jdoe>ipconfig /all Windows IP Configuration Host Name . . . . . . . . . . . . : ABC-PC --->Primary Dns Suffix . . . . . . . : mdanshin.co.za<--- Node Type . . . . . . . . . . . . : Hybrid IP Routing Enabled. . . . . . . . : No WINS Proxy Enabled. . . . . . . . : No DNS Suffix Search List. . . . . . : mdanshin.co.za
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In Windows 10:In the Internet Protocol (TCP/IP) Properties dialog box, click the Advanced button. Click the DNS tab in the Advanced TCP/IP Settings dialog box. Click the "Append these DNS suffixes (in order)" radio button. Now click the Add button to add DNS suffixes to the connection.
To see if the DNS suffix search list was pushed by group policy, we can run command gpresult/h c:\gpreport. html with admin privileges to check group policy result.
There's no netsh command to configure the DNS suffixes, but you can use Group Policy to set the DNS suffix list. Go to Computer Configuration, Policies, Administrative Templates, Network, DNS Client and you can set the DNS Suffix Search List setting. You set the primary through the Primary DNS Suffix setting.
DNS Suffixes are text that are appended to a host name in order to query DNS for an IP address. DNS works by use of “Domains”, equitable to namespaces and usually are a textual value that may or may not be “dotted” with other domains.
So, Alex K's answer is not correct (sorry). That will give you the connection specific DNS information which can be different for each adapter. Consider the configuration below. One adapter will give a different answer.
The correct answer is:
var primaryDnsSuffix = IPGlobalProperties.GetIPGlobalProperties().DomainName;
That will return the value in the line that says "Primary Dns Suffix"
IPInterfaceProperties.DnsSuffix Property
Multi-homed ipconfig /all output:
Windows IP Configuration Host Name . . . . . . . . . . . . : BOB Primary Dns Suffix . . . . . . . : fred.george.com Node Type . . . . . . . . . . . . : Peer-Peer IP Routing Enabled. . . . . . . . : No WINS Proxy Enabled. . . . . . . . : No DNS Suffix Search List. . . . . . : fred.george.com george.com PPP adapter Harry: Connection-specific DNS Suffix . : fred.george.com Description . . . . . . . . . . . : Harry Physical Address. . . . . . . . . : DHCP Enabled. . . . . . . . . . . : No Autoconfiguration Enabled . . . . : Yes IPv4 Address. . . . . . . . . . . : 192.168.1.2(Preferred) Subnet Mask . . . . . . . . . . . : 255.255.255.255 Default Gateway . . . . . . . . . : 0.0.0.0 DNS Servers . . . . . . . . . . . : 192.168.1.1 Primary WINS Server . . . . . . . : 192.168.1.100 Secondary WINS Server . . . . . . : 192.168.1.101 NetBIOS over Tcpip. . . . . . . . : Enabled Ethernet adapter Ethernet 2: Connection-specific DNS Suffix . : ron.george.com Description . . . . . . . . . . . : Realtek USB GbE Family Controller #2 Physical Address. . . . . . . . . : 6B-21-CD-65-AC-25 DHCP Enabled. . . . . . . . . . . : Yes Autoconfiguration Enabled . . . . : Yes IPv4 Address. . . . . . . . . . . : 192.168.1.3(Preferred) Subnet Mask . . . . . . . . . . . : 255.255.240.0 Lease Obtained. . . . . . . . . . : Friday, August 30, 2019 10:29:34 AM Lease Expires . . . . . . . . . . : Thursday, September 05, 2019 2:36:12 PM Default Gateway . . . . . . . . . : DHCP Server . . . . . . . . . . . : 192.168.1.1 DNS Servers . . . . . . . . . . . : 192.168.1.102 192.168.1.103 NetBIOS over Tcpip. . . . . . . . : Disabled Connection-specific DNS Suffix Search List : george.com
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