If you dont have access to the OpenVPN server to enforce the above configurations, then you can edit your OpenVPN client configuration file and add the lines dhcp-option DNS X.X.X. Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread. Define DNS addresses on OpenVPN Client config. If the Answer is helpful, please click " Accept Answer" and upvote it. Please kindly note that this forum is a public forum that everyone can view this thread, when you post the required screenshots please remove your private information. When VPN is up, could you please help to provide the result of Get-NetIPInterface, ipconfig /all and nslookup -d2 FQDN for further troubleshooting.
#F5 VPN CLIENT WINDOWS 10 DNS WINDOWS#
This setting applies to Windows Phone 8.1. Dont use VPN for local wifi traffic: Select whether to allow the device to connect to the VPN from a local wifi network. DNS suffix: Enter the DNS name without the host name.
![f5 vpn client windows 10 dns f5 vpn client windows 10 dns](https://techdocs.f5.com/content/dam/f5/kb/global/solutions/k72735781_images/dns_relay_proxy_process.png)
This setting applies to Windows Phone 10+. Am I correct here? Please correct me if my understanding is wrong. Enter a comma-separated list of company domains that are restricted access to the VPN. When VPN is up, the DNS query is going through the incorrect DNS server which also means when VPN is up, the DNS query is going through Ethernet interface rather than VPN interface. The metric of specified interface determines the priority of the interface, the lower metric, the more priority of the interface.īased on provided information, my understanding is when VPN is down, the DNS query and DNS resolution is working normally. We sniff the traffic on Ethernet interface and see only IPv4 DNS traffic.Īny idea why this behavior could make sense? There is no IPv6 connectivity on the Ethernet interface (nor on the VPN).
#F5 VPN CLIENT WINDOWS 10 DNS MAC OS#
Next we changed the metric of IPv6 of the Ethernet interface from 25 to 100 and enabled IPv6 again. K8253: Removing BIG-IP APM and FirePass client components from Windows client systems K12444: Overview of the Client Troubleshooting Utility for Windows K15302: Understanding BIG-IP Edge Client Component Update behavior for Windows and Mac OS Applies to: Product: BIG-IP, BIG-IP APM 16.X.X, 15.X.X, 14.X.X, 13.X.X, 12.X.X, 11.X.X, 10.X. And this works -> now DNS resolves the internal IP. Because we have to access the internal server the DNS response returns the wrong IP.Īfter some research we found that we should disable IPv6 on the Ethernet interface. Therefore VPN (CL06 VPN Verwaltung) has now the lowest metric and we would expect that DNS responses from the internal DNS servers will be used.īut we still see the DNS response from the DNS server configured on the Ethernet interface. The VPN client changes the metric as soon as the VPN tunnel is up.Īs we can see the metric of the IPv4 Ethernet interface has changed from 25 to 4250. It seems to be the response from the DNS server on the interface with the lowest metric. It looks like Win 10 asks all the DNS servers and selects one of the responses (if there are different responses). But for DNS requests you can observe, that there are DNS requests to the internal DNS servers (like expected) but also to the DNS servers configured on the LAN interface. One would expect that in force-tunnel mode all the network traffic goes to the VPN tunnel. The customer use split DNS, that means the same FQDN points to a different IPs depending if you are in an inside or outside network.Įverything works fine but there is a strange issue with DNS resolution. Server side is RRAS on Win Server 2019, client is Win 10. I can provide you with TeamViewer or Remote Desktop access if you want to diagnose.We set up Always On VPN in force-tunnel mode.
![f5 vpn client windows 10 dns f5 vpn client windows 10 dns](https://i0.wp.com/www.australtech.net/wp-content/uploads/2019/07/ms-chapv2.png)
This does not seem to be related to dns suffixes, but rather which DNS server is being used.
![f5 vpn client windows 10 dns f5 vpn client windows 10 dns](https://techdocs.f5.com/content/dam/projects/techdocs/edge-client-7-2-1/bigip/images/edge-client-windows-retry-connection-link.jpg)
IPv6 enabled VPN with split tunneling enabled: (does IPv6 enabled VPN without split tunneling: (does IPv6 disabled, VPN with split tunneling enabled: (does not work) IPv6 disabled, VPN without split tunneling: (works!) I also tried with DHCP, but it didn't make a difference. Here is the command line output of (ipconfig /all, route print and nslookup).
![f5 vpn client windows 10 dns f5 vpn client windows 10 dns](https://www.watchguard.com/help/docs/help-center/en-US/Content/Integration-Guides/AuthPoint/_images/f5-big-ip/Profiles.jpg)
It doesn't use my companies DNS server for any query in that case (it does without split tunneling and IPv6 disabled). FQDN's also don't work when either split tunneling or IPv6 is enabled.