# Document history for Network Load Balancers The following table describes the releases for Network Load Balancers. | Change | Description | Date | | --- |--- |--- | | [Weighted target groups](#doc-history) | This release adds support for default action with weighted target groups. | November 19, 2025 | | [QUIC and TCP\_QUIC Protocol Support](#doc-history) | This release adds support for QUIC and TCP\_QUIC protocols. | November 13, 2025 | | [Secondary IPv4 addresses](#doc-history) | This release adds support to add secondary IPv4 addresses to the load balancer network interfaces. | July 29, 2025 | | [Disable Availability Zones](#doc-history) | This releases adds support to disable an Availability Zone for an existing load balancer. | February 13, 2025 | | [Capacity Unit reservation](#doc-history) | This release adds support to set a minimum capacity for your load balancer. | November 20, 2024 | | [UDP support over IPv6 for dualstack load balancers](#doc-history) | This release enables clients to access UDP-based applications using IPv6. | October 31, 2024 | | [RSA 3072-bit and ECDSA 256/384/521-bit certificates](#doc-history) | This release adds support for RSA 3072-bit certificates, and Elliptic Curve Digital Signature Algorithm (ECDSA) 256, 384 and 521-bit certificates via AWS Certificate Manager (ACM). | January 19, 2024 | | [FIPS 140-3 TLS termination](#doc-history) | This release adds security policies that use FIPS 140-3 crypotographic modules when terminating TLS connections. | November 20, 2023 | | [Zonal DNS affinity](#doc-history) | This release adds support for clients resolving the load balancer DNS to receive an IP address in the same Availability Zone (AZ) they are in. | October 12, 2023 | | [Disable unhealthy target connection termination](#doc-history) | This release adds support to maintain active connections to targets that fail health checks. | October 12, 2023 | | [Default UDP connection termination](#doc-history) | This release adds support to terminate UDP connections at the end of the deregistration timeout by default. | October 12, 2023 | | [Register targets using IPv6](#doc-history) | This release adds support to register instances as targets when addressed by IPv6. | October 2, 2023 | | [Security groups for your Network Load Balancer](https://docs.aws.amazon.com/elasticloadbalancing/latest/network/load-balancer-security-groups.html) | This release adds support to associate security groups with your Network Load Balancers at creation. | August 10, 2023 | | [Target group health](#doc-history) | This release adds support to configure the minimum count or percentage of targets that must be healthy, and what actions the load balancer takes when the threshold is not met. | November 17, 2022 | | [Health check configuration](#doc-history) | This release provides improvements to health check configuration. | November 17, 2022 | | [Cross-zone load balancing](#doc-history) | This release adds support to configure cross-zone load balancing at the target group level. | November 17, 2022 | | [IPv6 target groups](#doc-history) | This release adds support to configure IPv6 target groups for Network Load Balancers. | November 23, 2021 | | [IPv6 internal load balancers](#doc-history) | This release adds support to configure IPv6 target groups for Network Load Balancers. | November 23, 2021 | | [TLS 1.3](https://docs.aws.amazon.com/elasticloadbalancing/latest/network/describe-ssl-policies.html) | This release adds security policies supporting TLS version 1.3. | October 14, 2021 | | [Application Load Balancers as targets](https://docs.aws.amazon.com/elasticloadbalancing/latest/network/application-load-balancer-target.html) | This release adds support to configure an Application Load Balancer as the target of a Network Load Balancer. | September 27, 2021 | | [Client IP preservation](https://docs.aws.amazon.com/elasticloadbalancing/latest/network/load-balancer-target-groups.html#client-ip-preservation) | This release adds support to configure client IP preservation. | February 4, 2021 | | [Security policy for FS supporting TLS version 1.2](https://docs.aws.amazon.com/elasticloadbalancing/latest/network/describe-ssl-policies.html) | This release adds a security policy for Forward Secrecy (FS) supporting TLS version 1.2. | November 24, 2020 | | [Dual-stack mode](https://docs.aws.amazon.com/elasticloadbalancing/latest/network/load-balancer-ip-address-type.html) | This release adds support for dual-stack mode, which enables clients to connect to the load balancer using both IPv4 addresses and IPv6 addresses. | November 13, 2020 | | [Connection termination on deregistration](#doc-history) | This release adds support to close connections to deregistered targets after the end of the deregistration timeout. | November 13, 2020 | | [ALPN policies](https://docs.aws.amazon.com/elasticloadbalancing/latest/network/load-balancer-listeners.html#alpn-policies) | This release adds support for Application-Layer Protocol Negotiation (ALPN) preference lists. | May 27, 2020 | | [Sticky sessions](https://docs.aws.amazon.com/elasticloadbalancing/latest/network/load-balancer-target-groups.html#sticky-sessions) | This release adds support for sticky sessions based on source IP address and protocol. | February 28, 2020 | | [Shared subnets](#doc-history) | This release adds support for specifying subnets that were shared with you by another AWS account. | November 26, 2019 | | [Private IP addresses](#doc-history) | This release enables you to provide a private IP address from the IPv4 address range of the subnet you specify when you enable an Availability Zone for an internal load balancer. | November 25, 2019 | | [Add subnets](#doc-history) | This release adds support for enabling additional Availability Zones after you create your load balancer. | November 25, 2019 | | [Security policies for FS](#doc-history) | This release adds support for three additional predefined forward secrecy security policies. | October 8, 2019 | | [SNI support](https://docs.aws.amazon.com/elasticloadbalancing/latest/network/tls-listener-certificates.html) | This release adds support for Server Name Indication (SNI). | September 12, 2019 | | [UDP protocol](#doc-history) | This release adds support for the UDP protocol. | June 24, 2019 | | [Available in new region](#doc-history) | This release adds support for Network Load Balancers in the Asia Pacific (Osaka) Region. | June 12, 2019 | | [TLS protocol](#doc-history) | This release adds support for the TLS protocol. | January 24, 2019 | | [Cross-zone load balancing](#doc-history) | This release adds support for enabling cross-zone load balancing. | February 22, 2018 | | [Proxy protocol](https://docs.aws.amazon.com/elasticloadbalancing/latest/network/load-balancer-target-groups.html#proxy-protocol) | This release adds support for enabling Proxy Protocol. | November 17, 2017 | | [IP addresses as targets](https://docs.aws.amazon.com/elasticloadbalancing/latest/network/load-balancer-target-groups.html#target-type) | This release adds support for registering IP addresses as targets. | September 21, 2017 | | [New load balancer type](#doc-history) | This release of Elastic Load Balancing introduces Network Load Balancers. | September 7, 2017 |