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Server Load Balancer:Features

Last Updated:Nov 14, 2025

Application Load Balancer (ALB) is available in the following editions:

  • Basic Edition: provides basic Application Load Balancer features, such as routing based on domain names, URLs, and HTTP headers.

  • Standard Edition: builds on the Basic Edition and provides enhanced capabilities for forwarding, security, monitoring, and connection management.

  • WAF-enabled Edition: builds on the Standard Edition and integrates Web Application Firewall (WAF 3.0) to provide application-layer security protection for web services.

The performance metrics of an ALB instance are independent of the instance edition.
Upgraded ALB instances can manage traffic using security groups or access control lists (ACLs). Instances created before the upgrade support only ACLs. To use security groups, you can create a new instance or contact your account manager to upgrade your existing instance.

Feature

Basic Edition

Standard Edition

WAF-enabled Edition

Listener Protocols

QUIC protocol

Supported

Supported

Supported

HTTP/2 protocol

Supported

Supported

Supported

HTTP/3 protocol

Supported

Supported

Supported

WebSocket protocol

Supported

Supported

Supported

Forwarding Rules

Routing based on domain names or paths

Supported

Supported

Supported

Routing based on HTTP headers

Supported

Supported

Supported

Routing based on query strings

Not supported

Supported

Supported

Routing based on cookies

Not supported

Supported

Supported

Routing based on HTTP request methods

Not supported

Supported

Supported

Routing based on source IP addresses

Not supported

Supported

Supported

Routing based on response status codes

Not supported

Supported

Supported

Routing based on response headers

Not supported

Supported

Supported

Forward to

Supported

Supported

Supported

Redirection

Supported

Supported

Supported

Rewrite or return a fixed response

Not supported

Supported

Supported

Insert or remove a header

Not supported

Supported

Supported

Traffic mirroring

Not supported

Supported

Supported

QPS throttling

Not supported

Supported

Supported

Cross-domain

Not supported

Supported

Supported

AScript programmable script

Not supported

Supported

Supported

Server group types

Server, IP, and Function Compute types

Supported

Supported

Supported

Security

Blacklists and whitelists for access control

Supported

Supported

Supported

Security groups

Supported

Supported

Supported

TLS cipher suites

Supported

Supported

Supported

SNI for multiple certificates

Supported

Supported

Supported

RSA and ECC dual certificates

Supported

Supported

Supported

ECC certificates

Supported

Supported

Supported

End-to-end HTTPS

Not supported

Supported

Supported

Mutual authentication

Not supported

Supported

Supported

Custom TLS security policies

Not supported

Supported

Supported

TLS 1.3 support

Supported

Supported

Supported

Monitoring And Statistics

Access logs

Supported

Supported

Supported

Infrastructure monitoring metrics

Supported

Supported

Supported

Tracing Analysis

Not supported

Supported

Supported

Advanced features

Retrieve client source IP

Not supported

Supported

Supported

Web Application Firewall (WAF)

Not supported (You can upgrade to the WAF-enabled Edition)

Not supported (You can upgrade to the WAF-enabled Edition)

Supported

Enabling Global Accelerator (GA)

Supported

Supported

Supported

Session persistence

Supported

Supported

Supported

Backend persistent connections

Supported

Supported

Supported

Instance cloning

Supported

Supported

Supported

Slow start

Not supported

Supported

Supported

Connection draining

Not supported

Supported

Supported

Disable cross-zone load balancing

Not supported

Supported

Supported