To verify this, I connected with the VPN, and when I checked 'scutil -dns', I got the list of resolvers, where resolver #1, wasn't the utun (it was en7), and it handled all the 'match domain'/'search domains'. But now it seems that the default interface will answer those queries as well, and they still won't reach the tunnel's DNS. So as a workaround, on a split-tunnel I have a list of 'match domains', and 'search domains'. A so-called Split-DNS setup describes a way of DNS operation where a DNS zone is maintained in an internal and an external configuration. Workaround with DNAT DNS request with layer7 haven't enough flexible and don't provide DNS failover. That is common practice in an enterprise, to redirect DNS request for own domain from internal network to local DNS server, and passthrough other requests to a global DNS server. So if internet is timing out there might be some other issue unrelated to split DNS. We can not dictate which DNS server to use for general internet queries when DNS split tunneling is enabled. The only time Ive used split-horizon DNS was when I set up a server to act as a router for my home network, so I. Split DNS would be used for internal queries. Im curious to know more about your setup. And now you are saying Internet access is timing out. I would like that even when a split-tunnel is enabled, all DNS queries will reach the tunnel's DNS, but I'm aware that this case is not 'working well', and the Packet Tunnel Provider is not supposed to capture all DNS queries, see those threads:, It would great to have split DNS features. At first you mention split DNS is not working. My question is related to the tunnel's DNS servers: set service dns forwarding options address//192.168. Split DNS is a method in some name server implementations that enables zone data to appear differently depending on which client queries the name server. Open a command prompt window on a computer in your LAN.I've implemented a custom VPN for macOS (system extension, Packet Tunnel Provider). Abount split dns: If ER is the DNS forwarder, a line like below should do the trick.To verify that your DNS server resolves your FQDN to the correct IP address: A dialog will appear confirming that the record was added. In the IP Address field enter the local IP of your 3CX server.Leave Name Empty so we force usage of the parent domain (Which is the FQDN).Right click on the zone you have just created and select “ New Host (A or AAAA)… ”.Your newly created zone will now appear under Forward Lookup Zones. In the Dynamic Update page leave the default options selected and click “Next”.In the Zone File page leave the default options selected and click “Next”.Select “Forward lookup zone” and click “Next”.DNS that you provide that subnet with should be internal DNS only if you want to ensure internal sites resolve. Leave the default “Primary zone” selected and click “Next”. You just need to do split-tunneling then on the MX Internet traffic goes out local, and traffic destined for internal will go over the VPN.Right-click on your server’s name and select “New Zone…”.Click “Tools” on the top right on the Server Manager window and from the drop-down menu select “DNS”.Step 1: Create a New Zoneįrom the Windows Server Manager application: In computer networking, split-horizon DNS is the facility of a Domain Name System (DNS) implementation to provide different sets of DNS information. The process is similar for other DNS Servers. We have used a 3CX provided FQDN, although you can do this with a custom domain as well. In this guide we have created an example using Microsoft DNS server which is included in Microsoft Windows Server. To achieve this you must have a DNS Server in your local LAN (Windows Server or any other configurable DNS Server) that can be configured to do this. This allows users to seamlessly connect with the 3CX Apps or the 3CX Web Client whether they are in or out of the office using the same secure FQDN / URL to the web client. This is also called a “Split DNS” configuration. You can enable split DNS to allow users to direct their DNS queries for applications and resources over the VPN tunnel or outside the VPN tunnel in addition to network traffic. The best way to achieve this is to create two zones for the same FQDN, one for external users and one for internal. Viscosity will automatically use Split DNS mode. If you are installing 3CX on-premise, you must configure an FQDN that resolves both externally (from outside your network) and internally (within your local network). When Split DNS is used, DNS requests for VPN specific domains will only use your VPN connections DNS servers.
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