![]() Multiple DNS servers could be configured to handle queries to as well. If the DNS request ends with one of the configured DNS suffixes, the request is sent to NetScaler Gateway for resolution otherwise, the request is sent to the local DNS server. All queries to *. go to the DNS server located behind the VPN tunnel.įor viewing and configuring split DNS entries, see Configuring Domain-Specific DNS Servers for Split DNS.īy adding a split DNS entry, all queries to are sent to the specific server (see Configuring Domain-Specific DNS Servers for Split DNS). If you set split DNS to either Remote or Both, the the mobile device sends the DNS request based on the DNS suffixes.Default DNS queries go to the public ISP DNS Server.Another is a VPN tunnel connected to the corporation network.One firewall is connected to the Internet.config split-dns edit 1 set domains ',' set dns-server1 192.168.100. It looks like all dns requests are sent to the remote dns, instead of only the specified domains. ![]() It seems complex, but it’s very easy to use. Domain list: Name of the list of split-DNS domains that the VPN gateway should send to VPN clients. Split-tunneling works fine, but split-dns not. Do it right Split DNS is pretty handy, and sometimes it’s necessary. When SonicOS/X DNS Proxy receives a query that matches the domain name, the name is transmitted to the designated DNS server.Īs an example, for a topology that has two firewalls with network connectivity: Split-Brain DNS is effectively like having two DNS servers running on the same origin, they each have a set of records, and will reply different values depending on how they’re being requested. This, the same DNS namespace on different DNS server, is called split DNS (sometimes also called split-horizon DNS, split-view DNS or split-brain DNS). With bind9 it's pretty simple to have different DNS views based upon the IP of the client with some ACLs.Split DNS is an enhancement that allows you to configure a set of servers and associate them to a given domain name (which can be a wildcard). However this not only "looks cheap", it might also cause problems with looking up the hotspot page, the "" and all the like. With this the guests can lookup the internal names and IPs (they cannot reach them due to the firewall, but this causes lenghty timeouts.Ī "cheap" way might be to assign a public DNS (i.e. How can I do this? The standard setup gives the SG ad DNS for wireless guest clients in the DHCP response. So "" shall give "not found", "shall give the external (not the internal) IP and all the like. However I want visitors on the guest SSID *not* have this forward to the internal nameserver. Works well with both wired and wireless corporate users. So users can lookup hosts like "", "" and all the like. The DNS is fed by the provider DNS, but there is a delegations for "*." to the internal AD DNS. So whatever domains configured in split-dns would be queries outside of tunnel and rest all would be queries through the tunnel. In computer networking, split-horizon DNS, split-view DNS, split-brain DNS, or split DNS is the facility of a Domain Name System (DNS) implementation to provide different sets of DNS information, usually selected by the source address of the DNS request. set service dns forwarding options address//192.168. split DNS Vangie Beal FebruUpdated on: In a split DNS infrastructure, you create two zones for the same domain, one to be used by the internal network, the other used by the external network typically users on the Internet. This functionality occurs after the tunnel has been established and the non-secure and secure routes are adjusted accordingly based on the Administrators configuration. What is Split DNS Introduction The Split DNS feature in Windows Server 2003 enables you to configure a single name-resolution process that resolves queries. However this SG has many other modules in use (namely firewall, web and mail protection). Abount split dns: If ER is the DNS forwarder, a line like below should do the trick. Dynamic Split Tunneling (DST) provides the ability to define domains that will be either included or excluded dynamically after the user resolves the domain using DNS. I'm currently setting up a WLAN on a SG230 for guest access (hotspot/ticket system). 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. Is it possible to have two different DNS views on the UTM based on the IP of the client? It would great to have split DNS features.
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