While the AWS Cloud provides many additional components and services beyond what is offered by Application Load Balancer(ALB), KEMP’s Virtual LoadMaster VLM for AWS has additional and enhanced features and capabilities that provide a rich set of integrated functionality, easily configured and managed via the Web User Interface. The same set of capabilities are available when LoadMaster, as an appliance or virtual machine, is used on premises. Having a common interface across all environments is a big advantage and provides a simpler, consistent management experience when deploying hybrid or heterogeneous cloud environments.
| Features | Application Load Balancer (ELB) | Virtual LoadMaster (VLM) |
|---|---|---|
| Pre-configured application templates | ||
| Clustering | ||
| Content Based Routing | URL Path based Routing | URL path, Header info & Payload |
| Round Robin Scheduling Method | Round Robin & Weighted Round Robin | Round Robin & Weighted Round Robin |
| Least Connections Scheduling Method | Least Connections Only | Least Connections & Weighted Least Connections |
| Fixed Weighting & Weighted Response Time Based Scheduling Method | ||
| Source IP based scheduling Methods | ||
| Server Cookie (Passive) Persistence | ||
| Server Cookie (Active) Persistence | ||
| Source IP Persistence | ||
| Advanced Session Persistence (Super HTTP, URL Hash, HTTP host Header, SSL Session ID, SIP, etc.) | ||
| Multi-protocol Support | Http & Https only | Support L4 & L7 TCP & UDP Protocols |
| SSL Offload/re-encryption | Off Load Only | Both |
| Content Caching/Compression | ||
| Advanced Authentication | * | (Advanced Options) |
| Multi-Application Support | (1 ALB/App) | |
| Web Application Firewall Protection |
* Supported by other services with AWS