Alibaba Cloud provides two editions of Application Load Balancer (ALB) instances: basic and standard. The features vary based on the edition. This topic describes the features of basic and standard ALB instances.
The following table describes the features supported by basic and standard ALB instances.
| Feature | Basic | Standard |
|---|---|---|
| Listening protocols | ||
| QUIC | Supported | Supported |
| HTTP/2 | Supported | Supported |
| WebSocket | Supported | Supported |
| Forwarding rules | ||
| Distribute network traffic based on domain names or URLs | Supported | Supported |
| Distribute network traffic based on HTTP headers | Supported | Supported |
| Distribute network traffic based on query strings | Not supported | Supported |
| Distribute network traffic based on cookies | Not supported | Supported |
| Distribute network traffic based on HTTP request methods | Not supported | Supported |
| Distribute network traffic based on source IP address | Not supported | Supported |
| Distribute network traffic based on response status codes | Not supported | Supported |
| Distribute network traffic based on response headers | Not supported | Supported |
| Redirects | Supported | Supported |
| Rewrite requests or return custom responses | Not supported | Supported |
| Add or delete headers | Not supported | Supported |
| Traffic mirroring | Not supported | Supported (submit a ticket to be included in the whitelist first) |
| QPS throttling | Not supported | Supported (submit a ticket to be included in the whitelist first) |
| AScript | Not supported | Supported (submit a ticket to be included in the whitelist first) |
| Security | ||
| Access control based on whitelists and blacklists | Supported | Supported |
| TLS cipher suites | Supported | Supported |
| Server Name Indication (SNI) for multiple certificates | Supported | Supported |
| Rivest-Shamir-Adleman (RSA) and elliptic-curve cryptography (ECC) certificates | Supported | Supported |
| ECC certificates | Supported | Supported |
| End-to-end data transfer over HTTPS | Not supported | Supported |
| Custom TLS cipher suites | Not supported | Supported |
| TLS 1.3 | Supported | Supported |
| Monitoring | ||
| Access log management | Supported | Supported |