TCP Acceleration

TCP Acceleration
The TCP Acceleration Performance Enhancing Proxy (PEP) is an optional feature that can be enabled on the Wan Accelerator to significantly enhance performance when sending TCP traffic over suboptimal network conditions or to improve TCP performance of slow TCP stack implementations.

Note: The PEP TCP Accelerator is available in v.4.
Limitations of Standard TCP
Most applications such as Email, HTTP, FTP and [...]

Packet Loss Recovery


Modern TCP stacks have become more efficient at dealing with latency by adding TCP Window Scaling and Selective Acknowledgements. However TCP is still vulnerable to packet loss and this has a drastic impact on network performance. Some degree of packet loss is almost always present in every wide area network. At times it is due to link quality but at other [...]

Router Mode – Out of Path

Wanos runs in bridge mode by default. In some cases it might not be possible to place a simple bridge appliance in-line or in-path. In this scenario out of path can be used by configuring the wan optimizer in router mode or server mode. This mode needs to be manually configured.

When router mode is configured, only the physical wan0 interface [...]

Virtual Wan Optimization – ESXi Lab Guide

Step by Step Guides with screenshots:
Single VM install on ESXi
Complete Lab on ESXi

Quick Start Guide:
By default Wanos runs in bridge or switch mode. In this back to back lab example, theoretically no configuration is required on the Wanos appliance to test optimization. In other words, it is plug and play, as long as the wan0 and lan0 are plugged into [...]

High Availability

Wan Optimization high availability or redundancy can be achieved by running a backup network cable parallel to the Wanos device.

When running RSTP the Wanos device is placed between two switches, connected via wan0 to the outside switch and lan0 to the inside switch. The backup link is cabled between the same two switches. Hence two cables run between the outside [...]


Wan Optimization Multipoint enables optimization between multiple fully meshed sites. The default configuration is sufficient for optimization over a point to point link. When enabling MultiSite on a dedicated appliance running the HDD/USB image, additional disk space may be required. This allows for a larger datastore which caters for the additional sites. If required, please see the steps to add [...]

Configuring QoS

Configuring Wan Optimization QoS
Any Wan Optimizer is not complete without QoS. Not only because QoS can be the best form of bandwidth optimization but also since Wan optimization techniques change the traffic signatures similar to how encryption does. Configure QoS to ensure traffic gets the most appropriate treatment over the WAN.  Wanos supports  classification, marking, shaping and priority queuing.
In this first [...]

vSphere vSwitch Guide

Wan Optimization Virtual Appliance on VMware vSwitch
When installing the virtual appliance, these guidelines can ensure that a bridge loop does not form. Both physical and virtual appliances bridge traffic. The in-path interface is a bridged connection between the lan0 and wan0 interfaces. The lan0 and wan0 virtual interfaces needs to map to distinct virtual switches and physical interfaces. In other [...]

Pass-through Traffic Policy

WAN Optimization QoS is essential to any optimization solution. This is because some protocols will always require a higher priority over another. In some cases the traffic needs be to be shaped or can be excluded from optimization. For example attempting to compress and deduplicate encrypted traffic is often counter productive. In this case an exclusion rule based on the protocol [...]

Quick Start Guide – VMware

Wan Optimization Virtual Appliance – VMware

Step by Step Guides with screenshots:
Single VM install on ESXi
Complete Lab on ESXi
Quick Start Guide:
It is recommended to use the OVA package to create the wan optimization virtual appliance. When using the VMDK file steps 1-3 from this guide is required.

By default Wanos runs in bridge or switch mode. In this back to back lab [...]