Abstract: Systems, methods, apparatuses, and software for a content delivery network that caches content for delivery to end user devices is presented. In one example, a method includes assigning prefixed network addresses for the sites of the content delivery network, with ones of the prefixed network addresses indicating associated pathways for routing network traffic to reach the sites over more than one backhaul packet network. The method includes announcing groups of the prefixed network addresses to selected ones of the backhaul packet networks, with each to the groups comprising a backhaul network-independent prefixed network address, a backhaul network-specific prefixed network address, and a failover prefixed network address. The method includes receiving the network traffic at the sites over ones of the backhaul packet networks that are selected among for routing the network traffic by source network addresses indicated in content requests issued from the sites.

Abstract: Described herein are methods, systems, and software for accommodating failover of a content node in a content delivery network. In one example, a method of operating a content node includes receiving a communication for an end user device from a control node, wherein an interrupted content node previously handled the communication. The method further includes determining if the communication includes a synchronization packet and identifying connection information for the communication. The method also provides, if the communication includes a synchronization packet, accepting the communication and handling delivery for the end user device. The method also includes, if the communication does not include the synchronization packet, determining if a match exists between the connection information for the communication and connection information stored in a flow table, and handling the communication based on the match.

Abstract: Systems, methods, apparatuses, and software for a content delivery network that caches content for delivery to end user devices is presented. In one example, a content delivery network (CDN) is presented having a plurality of cache nodes that cache content for delivery to end user devices. The CDN includes an anonymization node configured to establish anonymized network addresses for transfer of content to cache nodes from one or more origin servers that store the content before caching by the CDN. The anonymization node is configured to provide indications of relationships between the anonymized network addresses and the cache nodes to a routing node of the CDN. The routing node is configured to route the content transferred by the one or more origin servers responsive to content requests of the cache nodes based on the indications of the relationships between the anonymous network addresses to the cache nodes.

Abstract: Disclosed herein are methods, systems, and software for configuration change processing for end-user content request handling in content delivery nodes. In one example, a method of changing a content configuration for a content delivery node includes receiving a configuration change request by an end user. The method further provides, processing the configuration change request and a present configuration to generate a changed configuration comprising an assembly level code representation of the changed configuration, and transferring the changed configuration for delivery to the content delivery node.

Abstract: Methods, systems, and software for operating a data storage system of a content delivery node are provided herein. In one example, a method of operating a data storage system of a content delivery node is presented. The method includes receiving content data into a storage system, storing the content data in a first storage space, determining popular content data within the content data based on at least user requests for the content data, and storing the popular content data in a second storage space.

Abstract: Systems, methods, apparatuses, and software for caching tracking elements of network content are provided herein. In one example, a method of operating a cache node of a content delivery network that caches content for delivery to end user devices is provided. The method includes receiving content requests from an end user device for content cached by the cache node and responsively providing the content for delivery to the end user device, processing the content requests to determine properties related to the end user device based at least on the content requests, and executing a per-user function in the cache node for the end user device based at least on the properties related to the end user device.

Abstract: Systems, methods, apparatuses, and software for provide a digital media caching environment are provided herein. In one example, a method of operating a content node to provide a digital media caching environment is provided. The method includes receiving a request transferred by an end user device for digital media content. Responsive to the request, the method includes retrieving at least a header portion and a content subset of the digital media content from an origin server and transmuxing the content subset of the digital media content from an origin format into a stream format suitable for streaming to the end user device, and streaming the content subset in the stream format for delivery to the end user device.

Abstract: Systems, methods, apparatuses, and software for operating content delivery networks are provided herein. In one example, a method of operating a domain name translation node in a first point-of-presence of a content delivery network is presented. The method includes receiving a translation message issued by an end user device for translation of a domain name into a content network address, and processing the translation message to identify a network address of a node that transferred the translation message. The method also includes selecting the content network address based at least in part on correlations between network addresses and performance factors to direct the end user device to a target cache node at a point-of-presence different than the point-of-presence of the domain name translation node, and transferring a response message indicating the content network address which directs the end user device to the target cache node at the second point-of-presence.

Abstract: Disclosed herein are methods, systems, and software for bypassing a domain name system. In one example, a method of operating a user communication device includes receiving a user instruction requesting content within a user application of the user communication device. The method further provides, in response to the user instruction, processing at least a domain name system bypass data structure on the user communication device to identify a network address for retrieving the content. The method further includes, requesting the content from a content node using the network address.

Abstract: Systems, methods, apparatuses, and software for caching tracking elements of network content are provided herein. In one example, a method of operating a cache node of a content delivery network that caches content for delivery to end user devices is provided. The method includes receiving content requests from an end user device for content cached by the cache node and responsively providing the content for delivery to the end user device, processing the content requests to determine a edge state that corresponds to the end user device, transferring information related to the edge state for delivery to at least one other cache node of the content delivery network for handling of content requests received at the at least one other cache node.

Abstract: Systems, methods, apparatuses, and software that select network addresses of a content node of a content delivery network are provided herein. In one example, a method of operating a control node to perform network address selection that selects between different communication service providers according to network characteristics is presented. The control node receives a domain name lookup request from an end user device to reach a content node. The control node processes network characteristics and the domain name lookup request to select a network address that corresponds to one of the communication service providers. The end user device can use the selected network address to reach the content node over the selected communication service provider.

Abstract: Disclosed herein are methods, systems, and software for modifying a communication path based on content delivery performance data. In one example, a method of operating a content server that hosts content to be provided to a plurality of end user devices includes identifying latency data for a plurality of end user devices communicating with the content server, and identifying that the one or more end user devices in the plurality of end user devices exceed a latency threshold based on the latency data. The method further includes, in response to identifying that the one or more end user devices in the plurality of end user devices exceed the latency threshold, modifying the communication path between the content server and the one or more end user devices by modifying a domain name system (DNS) configuration for the content server.

Abstract: Systems, methods, apparatus, and software for transitional caching in content delivery networks includes edge cache nodes configured to receive and reply to content requests. Content can be cached in edge cache nodes before receiving user requests or retrieved from an origin server. A transitional cache node array is configured to receive content requests from edge cache nodes and to receive origin content from edge cache nodes and/or origin servers, as well as to modify origin content to generate modified content. Modified content can include re-written origin content (e.g., translations), transcoded data (e.g., video), compressed or otherwise adjusted data (e.g., images), and transformed files (e.g., CSS and JavaScript files), among others. In addition to assisting with original and modified content flow to end users, transitional caching also can assist in threat detection and mitigation within a CDN, helping to protect the network, origin servers and the like.

Abstract: Systems, methods, apparatuses, and software that announce prefixes associated content nodes of a content delivery network are provided herein. In one example, a method of operating a communication system comprising Internet service providers configured to exchange content requests between end user devices and content nodes is presented. The method includes assigning a content node of the content delivery network a first Internet Protocol (IP) address having an associated first short prefix and a first long prefix, and assigning the content node a second IP address having an associated second short prefix and a second long prefix. The method also includes announcing the first short prefix and the first long prefix to a first Internet service provider communicatively coupled to the content node, and announcing the second short prefix and the second long prefix to a second Internet service provider communicatively coupled to the content node.

Abstract: A privatized link between an origin server and a content delivery network is provided. A privatized link can be direct connection that does not route over the internet. Another privatized link is one that rotates IP addresses. An origin server may be assigned to use a set of multiple IP addresses for communication with the content delivery network. However, at any given time, the origin server is only using a small number of IP addresses. When one of the IP addresses being used to communicate with the content delivery network comes under attack, the origin server switches to another IP address in the set in order to continue serving content to the content delivery network via an IP address that is not under attack.

Abstract: Systems, methods, apparatuses, and software for a content delivery network that caches content for delivery to end user devices is presented. In one example, a method includes establishing address translations which translate domain names into network addresses usable by the end user devices for reaching content at the cache nodes, with portions of the network addresses comprising stenographic information, and responsive to domain name translation requests from the end user devices, providing ones of the network addresses. The method includes receiving content requests transferred by the end user devices that comprise the network addresses, and performing one or more actions based on the stenographic information in the network addresses.

Abstract: Systems, methods, and software for operating a content delivery system are provided herein. In one example, a method includes, in a first content delivery node, receiving a purge instruction to purge first content stored in the first content delivery node and responsively purging the first content. Responsive to purging the first content, the method includes transferring a content request for delivery to a second content delivery node, where the content request comprises a request for second content to replace the first content and a revision indicator of the first content. Responsive to the content request, the method includes receiving the second content for storage in the first content delivery node.

Abstract: Disclosed herein are methods, systems, and software for modifying a communication path based on latency. In one example, a method of operating a content node to alter a communication path includes identifying latency data for a plurality of end user devices communicating with the content node, and identifying that the one or more end user devices in the plurality of end user devices exceed a latency threshold based on the latency data. The method further includes, in response to identifying that the one or more end user devices in the plurality of end user devices exceed the latency threshold, modifying the communication path between the content node and the one or more end user devices by modifying a domain name system (DNS) configuration for the content node.

Abstract: Systems, methods, and software for operating a content delivery system to purge cached content are provided herein. In one example, purge messages are transferred for delivery to content delivery nodes (CDNs) in the content delivery system. The CDNs receive the messages, purge content associated with the messages, and compile purge summaries based on the messages. The CDNs further periodically transfer the purge summaries to one another to compare the messages received, and gather purge information for purge messages that may have been inadvertently missed by the CDNs.

Abstract: Systems, methods, apparatuses, and software for a content delivery network that caches content for delivery to end user devices is presented. In one example, a method includes assigning prefixed network addresses for the sites of the content delivery network, with ones of the prefixed network addresses indicating associated pathways for routing network traffic to reach the sites over more than one backhaul packet network. The method includes announcing groups of the prefixed network addresses to selected ones of the backhaul packet networks, with each to the groups comprising a backhaul network-independent prefixed network address, a backhaul network-specific prefixed network address, and a failover prefixed network address. The method includes receiving the network traffic at the sites over ones of the backhaul packet networks that are selected among for routing the network traffic by source network addresses indicated in content requests issued from the sites.