39 results about "Dns security" patented technology

In one embodiment, a DNS security network includes several DNS appliances and a security operations center (SOC) server computer. The SOC server computer may receive telemetry data from the DNS appliances, the telemetry data comprising information about DNS client queries received in the respective DNS appliances. From the telemetry data, the SOC server computer may generate security policies for distribution to the DNS appliances. The security policies may be used by the DNS appliances to determine whether a DNS client query is originated by a client computer performing a prohibited activity (e.g., sending spam, communicating with a zombie control computer, navigating to a prohibited website, etc.). An answer to a client query may be replaced or discarded altogether in cases where the originator is performing a prohibited activity.

New and improved techniques for a behavior analysis based DNS tunneling detection and classification framework for network security are disclosed. In some embodiments, a platform implementing an analytics framework for DNS security is provided for facilitating DNS tunneling detection. For example, an online platform can implement an analytics framework for DNS security based on passive DNS traffic analysis.

The invention discloses a DNS (Domain Name Server) safety monitoring system and method of a domain name resolution system. The DNS safety monitoring system comprises a data acquisition module and an event analysis module, wherein the data acquisition module is used for acquiring the network data of a DNS and providing the network data to the event analysis module; and the event analysis module isused for analyzing the network data and generating a monitoring result. The system and the method can be used for preventing network attacks such as domain name hijacks, site phishing, zombie attacks, and the like and improving the running stability and reliability of the DNS.

A cloud-based security method using Domain Name System (DNS) includes receiving a request from a user device at a DNS server; performing a security check on the request based on a policy look up associated with the user device; responsive to the policy look up, performing a DNS security check on the request; and responsive to the DNS security check, performing one of allowing the request to the Internet; blocking the request based on the policy; and providing the request to inline inspection based on the policy, wherein the request is one of allowed to the Internet or blocked based on the inline inspection.

The invention provides a method and a system for the security detection and repair of a wireless network. The method for the security detection and repair of the wireless network comprises the following steps: detecting the network configuration of the wireless network and sending a security detection request to a cloud detection side server by a client-side, wherein the detection result of the network configuration is carried in the security detection request; determining the security grade corresponding to the wireless network of the client-side according to the detection result and set security grade judgment rules and sending the determined security grade to the client-side by the cloud detection side server, wherein the security grade judgment rules comprise: if a DNS (Domain Name Server) conforms with a first DNS security rule, the security grade of the DNS is dangerous; if the DNS conforms with a second DNS security rule, the security grade of the DNS is secure; if the DNS conforms with a third DNS security rule, the security grade of the DNS is warning; repairing the network configuration of which the determined security grade is dangerous or warning by the client-side. Through the method and the system, the security risk of the DNS is inhibited and changed.

The invention provides a method and a device for prevention of DNS cathe attack. The device comprises an attack detection unit used for detecting whether a behavior about giving an attack according to the DNS server cathe exists, and adding the attacked domain into a protected list if the behavior exists; a cathe protection unit used for checking whether the domain in a DNS response message is in the protected list when the attack behavior happens, changing the survival time corresponding to the domain into a shorter survival time and sending out the changed response message if the domain is in the protected list. The method and the device for prevention of DNS cathe attack have a very remarkable effect of preventing the attack given to DNS cathe in an exhaustion manner.

The invention discloses a DNS (Domain Name Server) safety querying method and device. The method comprises the steps of capturing a DNS request data packet to be sent by a client; converting the DNS request data packet into a corresponding DNSSEC (Domain Name System Security Extensions) request data packet; sending the DNSSEC request data to a DNS server to receive a DNSSEC response data packet returned by the DNS server; capturing the DNSSEC response data packet received by the client; verifying to a digital signature in the DNSSEC response data packet through a public key provided by the DNS server; if passing the digital signature passes the verification, converting the DNSSEC response data packet into the corresponding DNS response data packet; performing DNS querying processing according to the DNS response data packet. According to the scheme, the method has the advantages that the DNSSEC verification process is applied to the client, and a trust relationship between the client and the closest DNS server is configured, so as to form a complete trust chain with the DNS servers at each level; the truth and integrity of the data can be verified through the client, and thus the problems of DNS hijacking and cheating can be further avoided.

The invention discloses a DNS health degree assessment method based on a fuzzy comprehensive evaluation model. The DNS health degree assessment method comprises the following steps that step 1: server original traffic is acquired through the mode of switch mirroring, and all the data in a DNS response package are acquired; step 2: statistical analysis is performed through the DNS traffic according to a time window so as to form historical data, DNS health degree influence factors are extracted and the value of each influence factor is calculated; step 3: the influence generated by dimension difference between all the influence factors is eliminated so that the evaluation value of each DNS health degree influence factor is acquired; step 4: all the factors are classified according to the degree of influence so as to form a multilevel evaluation system, and the weight of each level of influence factor is analyzed and determined; and step 5: the current DNS security state is assessed according to the weight and the evaluation value of each influence factor so as to acquire the evaluation result of the current health state of the DNS. The characteristics of the current DNS traffic are fully considered so that multiple abnormal conditions of the DNS can be effectively detected.

The invention relates to the technical field of cloud computing network server inner core safe access, in particular to a cloud computing network server inner core safe access method. According to the cloud computing network server inner core safe access method, actual requirements of cloud computing safety are combined, and a next-generation network access control model (UCON) is utilized. The UCON not only has the capacity of a traditional access control model, but also integrates the ability of credible management and digital right management. The UCON access control model is used to control system resources in the storage and document layer. The access control model capable of being tailored in a custom-made mode is adopted on a server virtualization platform to protect the safety of cloud computing virtualization. In a network layer, and DDOS is attacked against, DNS safety communication monitoring is conducted. Illegal access is discovered and forbidden in time so as to ensure server communication safety.

Multiple peer domain name system (DNS) servers are included in a multi-master DNS environment. One of the multiple peer DNS servers is a key master peer DNS server that generates one or more keys for a DNS zone serviced by the multiple peer DNS servers. The key master peer DNS server can also generate a signing key descriptor that identifies the set of one or more keys for the DNS zone, and communicate the signing key descriptor to the other ones of the multiple peer DNS servers.

The invention belongs to the technical field of domain name system (DNS) security protection, and particularly relates to a solution for coping with reflection amplification attacks of a DNS server. The solution comprises the following steps that: a field of cookie is added into a pseudo resource record of EDNS0; a user generates random cookie while sending a request, and a recursive server checks whether the cookie exists or not after reception of the request, and returns truncate to require the user to perform retransmission by using a transmission control protocol (TCP) if the cookie does not exist; if the cookie exists, the recursive server checks whether the request carries Server Cookie or not, returns the Server Cookie together with Client Cookie if the request does not carry the Server Cookie, checks whether Server Cookie of the user is consistent with the Server Cookie generated by the recursive server if the request carries the Server Cookie, returns the Server Cookie and the Client Cookie to the user if the Server Cookie of the user is consistent with the Server Cookie, and returns the truncate to require the user to perform retransmission by using the TCP if the Server Cookie of the user is not consistent with the Server Cookie; and the user checks whether the Client Cookie is the same as the random cookie or not, receives the data if the Client Cookie is the same as the random cookie, and discards the data if the Client Cookie is not the same as the random cookie.

The invention discloses a self-certified root implementation method based on open source DNS software, and relates to the technical field of DNS security improvement. The invention aims to solve the problem that the root area glue record is tampered due to the fact that a signature mechanism for the root area glue record is not provided in an existing DNSSEC scheme. The method comprises the following steps: generating a regional key and a signature of the regional key to a glue record in a root server and a top-level domain server; and releasing the top-level domain key and the glue record signature thereof to a root server to replace the original glue record of the root region, and querying the top-level domain glue record from the root server on a recursive analyzer and carrying out DNSSEC verification. According to the self-certified root scheme, potential safety hazards that glue records in a DNSSEC scheme may be tampered are improved, and the safety of the glue records in the rootregion is improved by adding signatures of the glue records in the root region. By modifying the source code of the open source DNS software, a trust chain of glue recording from the root domain to the top domain is established in the root region, and self-certification of the root is achieved.

The invention belongs to the technical field of DNS security protection and especially relates to a DNS end-to-end analysis method capable of ensuring safety and privacy. The method comprises the following steps: a configuration file of a client operating system is configured with an address of a recursive server; a client sends a DNS query message to a local 127.X.X.X address, and a client proxy process receives the query message and establishes HTTP or HTTPS connection with a proxy of the recursive server; the client adopts a POST interaction mode to sent data to the recursive server, and the DNS message is sent to the proxy of the recursive server through the HTTP or HTTPS in the form of binary content; when a DNS response message IS received from the recursive server, the DNS response message is sent to the client by adopting the process opposite to the DNS query message; and when the cache of the recursive server does not have the DNS query message, the recursive server sends a DNS request to an authoritative server through DNSSEC.

The embodiment of the invention discloses a security protection method and device for a domain name system (DNS) and the DNS. The security protection method for the DNS comprises the following steps: setting a security protection strategy on at least one specified node of the DNS; and performing attack identification and/or filtering based on the security protection strategy.

The invention relates to a safe DNS system based on local analysis and a DNS security analysis method. The system comprises a user side module and a server side module, the user side module is deployed in a host of a user, and the server side module is deployed in a provider of a solution; the user side module is in communication with the server side module through a private encryption protocol. The user side module includes an encryption communication module, a fixed data module, an updatable data module and a strategy updating module. The server side module includes an encryption communication module, a data collection module, a data processing module, a data issuing module and a task scheduling module. The DNS security analysis solution which can be achieved rapidly by the common user is provided, the user can promote the security level through independent deployment without waiting the network provider to deploy safety equipment on a large scale, and therefore safety problems are controlled by the user.

The invention discloses a network-based DNS security updating method in MIPv6. The method comprises the following steps: adding new items with key information for AAAA record updating into Binding Update (BU) of MIPv6, and providing service regulations of the items; transmitting the AAAA updating key of MN to HA through MIPv6 signalling, thereby ensuring the security of the AAAA record and the PTR record updating. By adopting the method, HA takes the duty of DNS updating operation of MN, so that the efficiency of updating operation is improved, dynamic DNS updating of large-scale nodes is supported, and in addition, the operation process of the method is compatible with updating operation defined in later RFC5026.