Methods for handling usage of a domain name service and corresponding devices

A method, performed by a device, for handling usage of a Domain Name Service (DNS) server in a communications network, the device operating in the communications network, the method comprising:

• receiving, from a first node operating in the communications network, a second indication, the second indication indicates one or more first indications indicating one or more rules on how a device is to select, based on a one or more criteria, a DNS server, out of one or more DNS servers, for use by the device for an application, wherein the second indication comprises an explicit indication of one of:
• a) which applications the one or more rules apply to, and b) that the one or more rules apply to all applications;
• wherein the second indication further indicates one or more of:
• an order of enforcement of the policy, and a type of traffic the policy applies to;
• and
• selecting the DNS server, out of the one or more DNS servers, for use by the device for the application, the selecting being based on the received second indication.

A method, performed by a second node, for handling usage of a Domain Name Service (DNS) server in a communications network, the second node operating in the communications network, the method comprising:

• sending, to a first node operating in the communications network, one or more first indications, the one or more first indications indicating one or more rules on how a device operating in the communications network is to select, based on one or more criteria, a DNS server, out of one or more DNS servers, for use by the device for an application, wherein the one or more first indications comprise an explicit indication of one of:
• a) which applications the one or more rules apply to, and b) that the one or more rules apply to all applications;
• wherein the first indications further indicates one or more of:
• an order of enforcement of the policy, and a type of traffic the policy applies to.

A first node, for handling usage of a Domain Name Service (DNS) server in a communications network, the first node being configured to operate in the communications network, the first node being further configured to:

• obtain one or more first indications, the one or more first indications being configured to indicate one or more rules on how a device configured to operate in the communications network is to select, based on one or more criteria, a DNS server, out of one or more DNS servers, for use by the device for an application, wherein the one or more first indications are configured to comprise an explicit indication of one of:
• a) which applications the one or more rules apply to, and b) that the one or more rules apply to all applications;
• and
• send a second indication to one of:
• another node configured to operate in the communications network and the device, the second indication being configured to indicate the one or more first indications configured to be obtained
• wherein the second indication further indicates one or more of:
• an order of enforcement of the policy, and a type of traffic the policy applies to.

A device, for handling usage of a Domain Name Service (DNS) server in a communications network, the device being configured to operate in the communications network, the device being further configured to:

• receive, from a first node configured to operate in the communications network, a second indication, the second indication being configured to indicate one or more first indications configured to indicate one or more rules on how a device is to select, based on one or more criteria, a DNS server, out of one or more DNS servers, for use by the device for an application, wherein the second indication is configured to comprise an explicit indication of one of:
• a) which applications the one or more rules apply to, and b) that the one or more rules apply to all applications;
• wherein the second indication further indicates one or more of:
• an order of enforcement of the policy, and a type of traffic the policy applies to;
• and
• select the DNS server, out of the one or more DNS servers, for use by the device for the application, the selecting being configured to be based on the second indication configured to be received.

A second node, for handling usage of a Domain Name Service (DNS) server in a communications network, the second node being configured to operate in the communications network, the second node being further configured to:

• send, to a first node configured to operate in the communications network, one or more first indications, the one or more first indications being configured to indicate one or more rules on how a device configured to operate in the communications network is to select, based on one or more criteria, a DNS server, out of one or more DNS servers, for use by the device for an application, wherein the one or more first indications are configured to comprise an explicit indication of one of:
• a) which applications the one or more rules apply to, and b) that the one or more rules apply to all applications;
• wherein the first indications further indicate one or more of:
• an order of enforcement of the policy, and a type of traffic the policy applies to.