US 11,743,107 B2
Techniques for indicating a degraded state of an authoritative name server
Burton S. Kaliski, Jr., McLean, VA (US); Eric Osterweil, Fairfax, VA (US); Duane Wessels, Moscow, ID (US); Frank Scalzo, Leesburg, VA (US); Glen Wiley, Goochland, VA (US); and Shumon Huque, Reston, VA (US)
Assigned to VeriSign, Inc., Reston, VA (US)
Filed by Verisign, Inc., Reston, VA (US)
Filed on Jan. 26, 2018, as Appl. No. 15/881,590.
Application 15/881,590 is a continuation of application No. 15/633,655, filed on Jun. 26, 2017, granted, now 11,032,127.
Prior Publication US 2018/0375715 A1, Dec. 27, 2018
This patent is subject to a terminal disclaimer.
Int. Cl. H04L 41/0654 (2022.01); H04W 24/04 (2009.01); H04L 69/40 (2022.01); H04L 61/58 (2022.01); H04L 61/4511 (2022.01); H04L 61/5076 (2022.01); H04L 41/042 (2022.01); H04L 61/45 (2022.01)
CPC H04L 41/0654 (2013.01) [H04L 61/4511 (2022.05); H04L 61/5076 (2022.05); H04L 61/58 (2022.05); H04L 69/40 (2013.01); H04W 24/04 (2013.01); H04L 41/042 (2013.01); H04L 61/45 (2022.05)] 17 Claims
OG exemplary drawing
 
1. A method for indicating a degraded state of an authoritative name server, the method comprising:
determining, at a first authoritative name server, that the first authoritative name server is in a first degraded state, wherein determining that the first authoritative name server is in the first degraded state comprises:
detecting an abnormal pattern of queries received by the first authoritative name server from a plurality of requesters, or
detecting an abnormal pattern of responses sent by the first authoritative name server to the plurality of requesters;
generating a status record specifying that the first authoritative name server is in the first degraded state, wherein the status record includes at least one of:
a degradation severity value specifying a severity level of the first degraded state, or a degradation cause value specifying a cause of the first degraded state;
associating the status record with a domain name service (DNS) response to a DNS query; and
transmitting the DNS response and the associated status record to a requester.