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.