Abstract: The present application relates to the field of power equipment detection devices, and in particular to a power transformer fault detection device, which includes a detection component for detecting the oil composition of the transformer, and also includes a rotating part comprising multiple groups of oil pools that are evenly spaced around the rotating axis of the rotating part. The multiple groups of oil pools are connected to oil outlets at different heights on the transformer, and a light-transmitting window is provided on the oil pool. A detection component is installed on the rotating part, and can detect the composition of the liquid in the oil pool through the light-transmitting window. The present application has the effect of allowing staff to monitor the working status of the transformer in a timely manner and reducing the labor burden of the staff.

Abstract: The present disclosure relates to domain name resolution technology and discloses a DNS resolution method, an authoritative DNS server and a DNS resolution system. In some embodiments, the authoritative DNS server receives a target domain name resolution request sent by a LDNS server, where the target domain name resolution request includes content information; the authoritative DNS server determines a target domain name resolution result according to the content information, and returns the target domain name resolution result to the LDNS server.

Abstract: A method for controlling a ratio of multi-CNAME traffic, includes: receiving, by a target authoritative DNS server, an A record query request for a target domain name sent by a local DNS server, and determining, by the target authoritative DNS server, all CNAME domain names according to stored CNAME records of the target domain name; acquiring, by the target authoritative DNS server, IP addresses corresponding to each CNAME domain name of all the CNAME domain names from an authoritative DNS server corresponding to each CNAME domain name; combining, by the target authoritative DNS server, IP addresses corresponding to all the CNAME domain names according to a preset traffic pulling ratio of the target domain name, to generate at least one IP group; and randomly feeding back, by the target authoritative DNS server, one IP group of the at least one IP group to the local DNS server.

Abstract: Method and device for detecting quality of service (QoS) of border gateway protocol (BGP) anycast cluster. In the method, the detection device receives detection-task information for detecting the QoS of the BGP anycast cluster, the detection-task information including a BGP anycast IP address; the detection device sends a detection-request information to the BGP anycast IP address, the detection-request information received by an entity server in the BGP anycast cluster that has a shortest AS path from the detection device; the detection device receives a detection-response information sent by the entity server in the BGP anycast cluster, the detection-response information including an IP address of the entity server; and the detection device generates detection index data according to the detection-request information and the detection-response information, the detection index data including the BGP anycast IP address and the IP address of the entity server.

Abstract: The present invention provides a DNS anti-attacking method, including receiving a domain name search request message by a recursive server; determining a first authoritative domain name server according to the first NS record and the A record of the first NS corresponding to the domain name and sending a domain name search request message to the first authoritative domain name server by the recursive server; receiving the A record of the domain name, a second NS record and an A record of the second NS returned from the first authoritative domain name server by the recursive server, wherein the second NS record records the authoritative domain name server used to parse the domain name and working at the normal status; and substituting the first NS record with the second NS record and caching the A record of the second NS by the recursive server.

Abstract: The present disclosure relates to domain name resolution technology and discloses a DNS resolution method, an authoritative DNS server and a DNS resolution system. In some embodiments, the authoritative DNS server receives a target domain name resolution request sent by a LDNS server, where the target domain name resolution request includes content information; the authoritative DNS server determines a target domain name resolution result according to the content information, and returns the target domain name resolution result to the LDNS server.

Abstract: A method, server and system for resolving a domain name are provided for improving efficiency of domain name resolution. A recursive DNS server receives a resolution request sent by a terminal, and determines the IP address of the domain name to be resolved according to a pre-stored association relation, where the association relation is obtained by the recursive DNS server from an authoritative DNS server corresponding to the domain name to be resolved, and is an association relation between a set of IP address segments, the domain name to be resolved, and the IP address of the domain name to be resolved. The recursive DNS server further generates a resolution response including the IP address of the domain name to be resolved, and returns the resolution response to the terminal, when the IP address of the domain name to be resolved exists in the recursive DNS server.

Abstract: The present invention provides a DNS anti-attacking method, including receiving a domain name search request message by a recursive server; determining a first authoritative domain name server according to the first NS record and the A record of the first NS corresponding to the domain name and sending a domain name search request message to the first authoritative domain name server by the recursive server; receiving the A record of the domain name, a second NS record and an A record of the second NS returned from the first authoritative domain name server by the recursive server, wherein the second NS record records the authoritative domain name server used to parse the domain name and working at the normal status; and substituting the first NS record with the second NS record and caching the A record of the second NS by the recursive server.