US 11,777,898 B2 · Apparatus and method for establishing and maintaining a DS-lite tunnel

Abstract

An electronic apparatus for establishing a Dual-Stack Lite (DS-lite) tunnel is provided. The apparatus sends a request for an Internet Protocol (IP) address of a Domain Name System (DNS) server and a domain name of an Address Family Transition Router (AFTR) server to a Dynamic Host Configuration Protocol (DHCP) server using an IP address of the DHCP server, receives the IP address of the DNS server and the domain name of the AFTR server from the DHCP server in response to the request, sends a DNS query including the domain name of the AFTR server to the DNS server using the IP address of the DNS server. In response to the DNS query being successful, the apparatus receives an IP address of the AFTR server from the DNS server, and establishes the DS-lite tunnel between the apparatus and the AFTR server using the IP address of the AFTR server.

Claims20

Dependent claims

An electronic apparatus for establishing a Dual-Stack Lite (DS-lite) tunnel, the electronic apparatus comprising:

a memory storing computer-readable instructions;
a processor configured to execute the computer-readable instructions to:
acquire an Internet Protocol (IP) address of a Domain Name System (DNS) server and a domain name of an Address Family Transition Router (AFTR) server from a Dynamic Host Configuration Protocol (DHCP) server;
send a DNS query to the DNS server, wherein the DNS query comprises the domain name of the AFTR server;
determine that a reply to the DNS query was received from the DNS server, wherein the reply comprises the IP address of the AFTR server;
establish a DS-lite tunnel between the electronic apparatus and the AFTR server;
provide to one or more client devices with IPv4 addresses only access to an external network via the DS-lite tunnel using the IP address of the AFTR server;
maintain the DS-lite tunnel with the AFTR server;
and
periodically send one or more subsequent DNS queries for one or more subsequent IP addresses of the AFTR server to the DNS server based on a DNS time to live (TTL) timer.

7 more elements

A non-transitory computer-readable medium of an electronic apparatus storing one or more computer-readable instructions for establishing a Dual-Stack Lite (DS-lite) tunnel, that when executed by a processor of the electronic apparatus, cause the processor to perform one or more operations comprising:

acquiring an Internet Protocol (IP) address of a Domain Name System (DNS) server and a domain name of an Address Family Transition Router (AFTR) server from a Dynamic Host Configuration Protocol (DHCP) server;
sending a DNS query to the DNS server, wherein the DNS query comprises the domain name of the AFTR server;
determining that a reply to the DNS query was received from the DNS server, wherein the reply comprises the IP address of the AFTR server;
establishing a DS-lite tunnel between the electronic apparatus and the AFTR server;
providing to one or more client devices with IPv4 addresses only access to an external network via the DS-lite tunnel using the IP address of the AFTR server;
maintaining the DS-lite tunnel with the AFTR server;
and
periodically sending one or more subsequent DNS queries for one or more subsequent IP addresses of the AFTR server to the DNS server based on a DNS time to live (TTL) timer.

5 more elements

Dependencies are inferred from the claim text.

Apparatus and method for establishing and maintaining a DS-lite tunnel

Life of this patent

Apparatus and method for establishing and maintaining a DS-lite tunnel

Life of this patent

Abstract

Claims20