A system is provided for generating and signing cryptographically generated addresses (“CGA”) using computing network traffic. In particular, the system, as well as any authorized computing systems within the network, may monitor network traffic during a specified time window for designated types of data or information during the time window. Based on monitoring the network traffic, the system may generate a cryptographic hash output of the data or information collected. The hash output may then subsequently be used, in part or whole, as the modifier in a CGA algorithm to generate a CGA. The system may then selective authorize devices which have generated the CGA using the correct modifier.

Methods and apparatus for filtering lawfully intercepted encrypted traffic are described. A communications service provider network includes a mediation device and a security device. The mediation device receives a provisioned intercept request including a target IP address and one or more unique identifies corresponding to the target. The security device acquires certificates and private keys corresponding to one or more content distribution networks of interest for which intercepted traffic is to be partially or fully discarded. The mediation device receives filtering requests specifying filtering rules to be applied. Intercepted traffic is processed by the mediation device operating in conjunction with the security device to attempt decryption and identify the corresponding CDN network for the intercepted traffic. The mediation devices filters the decrypted traffic in accordance with the filtering rules, discarding traffic that is not of interest to the law enforcement agency (LEA) and sending traffic of interest to the LEA.

Techniques are described for improving real-time application protection (RTAP) systems (e.g., web application firewalls (WAFs), runtime application self-protection (RASP) systems). In particular, a device within a trusted network may be configured to identify risks of the RTAP systems. For example, the device may compare a plurality of attack signatures, from configuration settings of an application protection system to a plurality of defects from a defect data store; determine that at least one configuration setting of the application protection system corresponding to an application does not include protections for at least one defect of the plurality of defects; and in response to determine that the at least one configuration setting of the application protection system does not include protections for the at least one defect, generate an alert corresponding to the at least one defect.

A packet-filtering device may receive packet-filtering rules configured to cause the packet-filtering device to identify packets corresponding to network-threat indicators. The packet-filtering device may receive packets and, for each packet, may determine that the packet corresponds to criteria specified by a packet-filtering rule. The criteria may correspond to one or more of the network-threat indicators. The packet-filtering device may apply an operator specified by the packet-filtering rule. The operator may be configured to cause the packet-filtering device to either prevent the packet from continuing toward its destination or allow the packet to continue toward its destination. The packet-filtering device may generate a log entry comprising information from the packet-filtering rule that identifies the one or more network-threat indicators and indicating whether the packet-filtering device prevented the packet from continuing toward its destination or allowed the packet to continue toward its destination.

Provided is an intrusion detection technique configured to: obtain kernel-filter criteria indicative of which network traffic is to be deemed potentially malicious, determine that a network packet is resident in a networking stack, access at least part of the network packet, apply the kernel-filter criteria to the at least part of the network packet and, based on applying the kernel-filter criteria, determining that the network packet is potentially malicious, associate the network packet with an identifier of an application executing in userspace of the operating system and to which or from which the network packet is sent, and report the network packet in association with the identifier of the application to an intrusion-detection agent executing in userspace of the operating system of the host computing device, the intrusion-detection agent being different from the application to which or from which the network packet is sent.

Techniques are disclosed for generating intent-based policies and applying the policies to traffic of a computer network. In one example, a policy controller for the computer network receives traffic statistics for traffic flows among a plurality of application workloads executed by a first set of computing devices. The policy controller correlates the traffic statistics into session records for the plurality of application workloads. The policy controller generates, based on the session records for the application workloads, application firewall policies for the application workloads. Each of the application firewall policies define whether traffic flows between application workloads are to be allowed or denied. The policy controller distributes the application firewall policies to a second set of one or more computing devices for application to traffic flows between instances of the application workloads.

Techniques are disclosed for redirecting network traffic of virtualized application workload to a host-based firewall. For example, a system comprises a software defined networking (SDN) controller of a multi-tenant virtualized data center configured to: receive a security policy expressed as one or more tags to redirect traffic of a virtualized application workload to a host-based firewall (HBF) of the multi-tenant virtualized data center; configure network connectivity to the HBF in accordance with the security policy; a security controller that manages the HBF configured to: obtain the one or more tags from the SDN controller; receive one or more firewall policies expressed in terms of the one or more tags, wherein each of the one or more firewall policies specifies a function of the HBF; and configure the function of the HBF in accordance with the one or more firewall policies.

There is provided a method comprising receiving a domain name system (DNS) query from a client computing device, decrypting the DNS query by a DNS resolver device, and requesting reputation information related to the FQDN from an agent device of the router apparatus. If a matching FQDN is not found in a local database, the DNS query is allowed to proceed from the DNS resolver device to a cloud DNS resolver, the IP and MAC address of the client computing device are logged and mapped to the local database, the reputation information related to the FQDN is requested from a cloud FQDN server, and if the reputation information indicates that the FQDN should be blocked, the local database is updated with the reputation information and further queries to the FQDN are blocked.

The subject matter described herein provides technical solutions for technical problems facing computing network security. Technical solutions described herein include adaptive sniffing of networking traffic, such as using a brokered network traffic sniffing framework. A brokered sniffing framework may be used to provide dynamic adjustment of network access points and network traffic sampling queries, such as by providing dynamic adjustment in response to changes to the network topology or network traffic. The brokered sniffing framework may provide improved statistical sampling of network traffic using improved network traffic telemetry, such as by modifying a statistical profile of network traffic contents that are collected. The network traffic telemetry may be used to identify various changes in network traffic, such as by identifying statistically significant changes in latencies, bandwidths, or other data center performance metrics.

Some embodiments provide a system for detecting threats to a datacenter. The system includes a set of processing units and a set of non-transitory machine-readable media storing an analysis appliance. The analysis appliance includes multiple event detectors that analyze information received from host computers in the datacenter to identify anomalous events occurring in the datacenter. The analysis appliance includes a graph generation module that generates a graph of connections between data compute nodes (DCNs) in the datacenter based on the information received from the host computers. The analysis appliance includes a lateral movement threat detection module that (i) uses the graph of connections to identify a set of connections between a set of the DCNs based on a particular anomalous event and (ii) uses the set of connections and the identified anomalous events to determine whether the set of connections is indicative of a lateral movement attack on the datacenter.