Windows Server 2016 RRAS and clients DNS

When using a static ip address pool for VPN clients the RRAS server assigns the same DNS servers to the clients that are configured in the TCP/IP properties of the server NIC that's bound to RRAS so I'd check that.

--please don't forget to Accept as answer if the reply is helpful--

Hi DSPatrick, I have checked that and although the RRAS bound interface has two DNS servers defined, neither are being supplied for the clients.

Please post an unedited ipconfig /all of both problem client and VPN server.

Hi,

Thanks for posting here.

I agree with DSPatrick that when using a static ip address pool for VPN clients, the RRAS server assigns the same DNS servers that are configured in the TCP/IP properties of the RRAS server's NIC to the clients.

May I know if IP addresses in static address pool of VPN server are in the same subnet of VPN server's internal IP address?

As DSPatrick suggested, could you please help provide the result of "ipconfig /all" of impacted client and VPN server for us further troubleshooting?

Click Start==>type "cmd"==>right click Command Prompt==>select Run as administrator==>insert command "ipconfig /all"

Hope my answer will help you!

---Please Accept as answer if the reply is helpful---

Best Regards,
Sunny

Dear DSPatrick, here is the unedit ipconfig (I've just change our network prefix - we have a public /16 IPv4 block) to "10.0."):

>ipconfig /all


Windows IP Configuration

   Host Name . . . . . . . . . . . . : VPNTESTE
   Primary Dns Suffix  . . . . . . . : someplace.br
   Node Type . . . . . . . . . . . . : Hybrid
   IP Routing Enabled. . . . . . . . : Yes
   WINS Proxy Enabled. . . . . . . . : No
   DNS Suffix Search List. . . . . . : someplace.br

PPP adapter RAS (Dial In) Interface:

   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : RAS (Dial In) Interface
   Physical Address. . . . . . . . . :
   DHCP Enabled. . . . . . . . . . . : No
   Autoconfiguration Enabled . . . . : Yes
   IPv4 Address. . . . . . . . . . . : 10.0.193.0(Preferred)
   Subnet Mask . . . . . . . . . . . : 255.255.255.255
   Default Gateway . . . . . . . . . :
   NetBIOS over Tcpip. . . . . . . . : Enabled

Tunnel adapter Reusable ISATAP Interface {58A646BF-C858-4A72-9CB8-FE92790F09EF}:

   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : Microsoft ISATAP Adapter
   Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
   DHCP Enabled. . . . . . . . . . . : No
   Autoconfiguration Enabled . . . . : Yes

Tunnel adapter isatap.{6AE82518-6256-4DE7-A6AB-DEDA0A67A75A}:

   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : Microsoft ISATAP Adapter #2
   Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
   DHCP Enabled. . . . . . . . . . . : No
   Autoconfiguration Enabled . . . . : Yes

Ethernet adapter Ethernet1:

   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : Intel(R) 82574L Gigabit Network Connection #2
   Physical Address. . . . . . . . . : 00-50-56-A1-FE-CE
   DHCP Enabled. . . . . . . . . . . : No
   Autoconfiguration Enabled . . . . : Yes
   IPv4 Address. . . . . . . . . . . : 10.0.0.66(Preferred)
   Subnet Mask . . . . . . . . . . . : 255.255.255.248
   Default Gateway . . . . . . . . . : 10.0.0.70
   DNS Servers . . . . . . . . . . . : 10.0.1.33
                                       10.0.2.33
   NetBIOS over Tcpip. . . . . . . . : Enabled

Dear SunnyQi-MSFT, the IP address pools we have configured are as follows (as in the previous output, I've just changed our network prefix to "10.0"):

10.0.193.0 10.0.193.254
10.0.153.0 10.0.153.254
10.0.103.0 10.0.103.254
10.0.117.0 10.0.117.254
10.0.166.0 10.0.166.254

Kind regards,