That means your security sensitive cloud solutions not only gain access to Azure industry-leading reliable and scalable asynchronous messaging capabilities, but they can now use messaging to create communication paths between secure solution compartments that are inherently more secure than what is achievable with any peer-to-peer communication mode, including HTTPS and other TLS-secured socket protocols. Workloads in two distinct virtual networks that are both bound to the same Event Hubs instance can communicate efficiently and reliably via messages, while the respective network isolation boundary integrity is preserved. ![]() Messaging services provide insulated communication paths, where messages are even written to disk as they transition between parties. Solutions that require tight and compartmentalized security, and where virtual network subnets provide the segmentation between the compartmentalized services, still need communication paths between services residing in those compartments.Īny immediate IP route between the compartments, including those carrying HTTPS over TCP/IP, carries the risk of exploitation of vulnerabilities from the network layer on up. Advanced security scenarios enabled by VNet integration This feature isn't supported in the basic tier. You can add specific IP addresses in the IP firewall to enable access to the Event Hub public endpoint. Enabling a service endpoint, by default, enables the denyall rule in the IP firewall associated with the virtual network. The result is a private and isolated relationship between the workloads bound to the subnet and the respective Event Hubs namespace, in spite of the observable network address of the messaging service endpoint being in a public IP range. From the virtual network perspective, binding an Event Hubs namespace to a service endpoint configures an isolated networking tunnel from the virtual network subnet to the messaging service. Once configured to bound to at least one virtual network subnet service endpoint, the respective Event Hubs namespace no longer accepts traffic from anywhere but authorized subnets in virtual networks. The integration of Event Hubs with Virtual Network (VNet) Service Endpoints enables secure access to messaging capabilities from workloads such as virtual machines that are bound to virtual networks, with the network traffic path being secured on both ends. IP filter rules are applied in order, and the first rule that matches the IP address determines the accept or reject action.įor more information, see How to configure IP firewall for an event hub Network service endpoints The response does not mention the IP rule. Any connection attempt from an IP address that does not match an allowed IP rule on the Event Hubs namespace is rejected as unauthorized. Therefore, the rules apply to all connections from clients using any supported protocol. The IP firewall rules are applied at the Event Hubs namespace level. For example, if you use Event Hubs with Azure Express Route, you can create a firewall rule to allow traffic from only your on-premises infrastructure IP addresses. Firewall rules enable you to configure rules to accept traffic originating from specific IPv4 addresses. This feature is helpful in scenarios in which Azure Event Hubs should be only accessible from certain well-known sites. With IP firewall, you can restrict it further to only a set of IPv4 addresses or IPv4 address ranges in CIDR (Classless Inter-Domain Routing) notation. IP firewallīy default, Event Hubs namespaces are accessible from internet as long as the request comes with valid authentication and authorization. Service tagĪzure Event Hubs service tag contains some of the IP addresses used by Azure Service Bus because of historical reasons. By specifying the service tag name (for example, EventHub) in the appropriate source or destination field of a rule, you can allow or deny the traffic for the corresponding service. Use service tags in place of specific IP addresses when you create security rules. You can use service tags to define network access controls on network security groups or Azure Firewall. For more information about service tags, see Service tags overview. Microsoft manages the address prefixes encompassed by the service tag and automatically updates the service tag as addresses change, minimizing the complexity of frequent updates to network security rules. This article describes how to use the following security features with Azure Event Hubs:Ī service tag represents a group of IP address prefixes from a given Azure service.
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