DYNAMIC DOMAIN NAME SYSTEM DESTINATION SELECTION
A user device, in trying to communicate with an internet resource knowing an associated domain name, transmits a Domain Name System (DNS) request packet to a DNS server, which responds with a DNS response packet identifying multiple Internet Protocol (IP) addresses corresponding to multiple servers associated with the identified domain name. The user device then selects one of these servers and communicates with that selected server. The user device may select the server by probing properties of the servers and of the connections between the user device and each of the servers, and by then picking the server whose own properties and whose connection properties are better. The user device probes these properties by sending at least one set of probe packets to each server and receiving at least one set of probe return packets and calculating round trip time, hop distance, bandwidth, latency, packet loss rate, and other properties.
1 . A method for domain server communication, the method comprising:
receiving a domain name system (DNS) response packet over a communication network, the domain name system (DNS) response packet identifying a plurality of internet protocol (IP) addresses corresponding to a domain name;
transmitting a plurality of probe packets by transmitting a probe packet to each server of a plurality of servers, the plurality of servers corresponding to the plurality of internet protocol (IP) addresses identified in the domain name system (DNS) response packet;
receiving one or more probe return packets by receiving a probe return packet from each server of at least a subset of the plurality of servers;
calculating one or more connection parameters based on at least the receipt of the one or more probe return packets, the one or more connection parameters associated with one or more connections, the one or more connections each having an endpoint at one server of at least the subset of the plurality of servers from which a probe return packets have been received;
selecting a selected server of the plurality of servers based on at least the calculated one or more connection parameters; and
communicating with the selected server.
2 . The method of claim 1 , wherein calculating the one or more connection parameters includes calculating a round trip time (RTT) from a transmission time of a first probe packet to a receipt time of a first probe return packet.
3 . The method of claim 1 , wherein calculating the one or more connection parameters includes calculating a hop distance to a first server.
4 . The method of claim 1 , wherein calculating the one or more connection parameters includes calculating one of a connection bandwidth, a connection latency, a connection packet drop rate, or some combination thereof.
5 . The method of claim 1 , wherein calculating the one or more connection parameters includes identifying one or more hardware components of a first server or a first connection or some combination thereof.
6 . The method of claim 1 , wherein calculating the one or more connection parameters includes identifying one or more software elements executed by a first server.
7 . The method of claim 1 , further comprising transmitting a domain name system (DNS) request to a domain name system (DNS) server, the domain name system (DNS) request identifying the domain name corresponding to the plurality of internet protocol (IP) addresses.
8 . The method of claim 1 , further comprising transmitting a reset packet to at least the subset of servers following receipt of the one or more probe return packets.
9 . The method of claim 8 , wherein the probe packets are SYN packets, the probe return packets are ACK packets, and the reset packets are RST packets.
10 . A system for domain server communication, the system comprising:
a communication transceiver, the communication transceiver communicatively coupled to at least a plurality of servers and a domain name system (DNS) server over a communication network; and
a processor coupled to a memory and to the communication transceiver, wherein execution of instructions stored in the memory by the processor:
receives a domain name system (DNS) response packet via the communication transceiver over the communication network, the domain name system (DNS) response packet identifying a plurality of internet protocol (IP) addresses corresponding to a domain name,
transmits a plurality of probe packets via the communication transceiver by transmitting a probe packet to each server of the plurality of servers, the plurality of servers corresponding to the plurality of internet protocol (IP) addresses identified in the domain name system (DNS) response packet,
receives one or more probe return packets via the communication transceiver by receiving a probe return packet from each server of at least a subset of the plurality of servers,
calculates one or more connection parameters based on at least the receipt of the one or more probe return packets, the one or more connection parameters associated with one or more connections, the one or more connections each having an endpoint at one server of at least the subset of the plurality of servers from which a probe return packets have been received,
selects a selected server of the plurality of servers based on at least the calculated one or more connection parameters, and
communicates with the selected server via the communication transceiver.
11 . The system of claim 10 , wherein calculating the one or more connection parameters via execution of the instructions by the processor includes calculating a round trip time (RTT) from a transmission time of a first probe packet to a receipt time of a first probe return packet.
12 . The system of claim 10 , wherein calculating the one or more connection parameters via execution of the instructions by the processor includes calculating a hop distance to a first server.
13 . The system of claim 10 , wherein calculating the one or more connection parameters via execution of the instructions by the processor includes calculating one of a connection bandwidth, a connection latency, a connection packet drop rate, or some combination thereof.
14 . The system of claim 10 , wherein calculating the one or more connection parameters via execution of the instructions by the processor includes identifying one or more hardware components of a first server or a first connection or some combination thereof.
15 . The system of claim 10 , wherein calculating the one or more connection parameters via execution of the instructions by the processor includes identifying one or more software elements executed by a first server.
16 . The system of claim 10 , wherein execution of the instruction by the processor further transmits a domain name system (DNS) request to a domain name system (DNS) server, the domain name system (DNS) request identifying the domain name corresponding to the plurality of internet protocol (IP) addresses.
17 . The system of claim 10 , wherein execution of the instruction by the processor further transmits a reset packet to at least the subset of servers following receipt of the one or more probe return packets.
18 . The system of claim 17 , wherein the probe packets are SYN packets, the probe return packets are ACK packets, and the reset packets are RST packets.
19 . The system of claim 10 , further comprising one or more additional devices communicatively coupled to the communication transceiver along a connection to the communication network, the one or more additional devices including one or more firewall devices, one or more Network Address Translation (NAT) devices, or some combination thereof.
20 . A non-transitory computer-readable storage medium, having embodied thereon a program executable by a processor to perform a method for domain server communication, the method comprising:
receiving a domain name system (DNS) response packet over a communication network, the domain name system (DNS) response packet identifying a plurality of internet protocol (IP) addresses corresponding to a domain name;
transmitting a plurality of probe packets by transmitting a probe packet to each server of a plurality of servers, the plurality of servers corresponding to the plurality of internet protocol (IP) addresses identified in the domain name system (DNS) response packet;
receiving one or more probe return packets by receiving a probe return packet from each server of at least a subset of the plurality of servers;
calculating one or more connection parameters based on at least the receipt of the one or more probe return packets, the one or more connection parameters associated with one or more connections, the one or more connections each having an endpoint at one server of at least the subset of the plurality of servers from which a probe return packets have been received;
selecting a selected server of the plurality of servers based on at least the calculated one or more connection parameters; and
communicating with the selected server.