flexiWAN Release 4.1.4

Release 4.1.4 includes:

  • flexiManage release 4.1.6

  • flexiEdge release 4.1.16

Release Notes:

flexiWAN is the world’s first open source SD-WAN with a modular and open architecture.

Version 4.1.2 was updated on June 29th, 2021. This version introduces a upgraded vpp version, performance improvements, IKEv2, multiple interfaces local breakout and bug fixes. Latest bugfix, 4.1.4, released on August 2nd, 2021.


It is not mandatory to upgrade the latest version, it has a fix when sending traffic from branch to the data center.

There are three options for hosting flexiManage, each relevant for companies with a different set of requirements. All of these options come with support services.

  • SaaS model in a shared environment - flexiManage hosted by flexiWAN

  • Dedicated environment - a dedicated, white-label deployment just for you

  • Self-hosting - self-hosting of flexiManage is typically best for large service providers

More information about these 3 options and in order to understand which of these is best for you, please read this blog post. Pricing information can be found here.

Please contact us for further questions.

New in this release:

  • VPP upgrade to release 21.01

  • Use Python 3 for agent code

  • Additional tunnel encryption key exchange protocols: IKEv2 and No-Encryption

  • Allow to define a policy for local breakout across multiple WAN interfaces

  • Performance improvements and Multi-Core enhancements using RSS acceleration

  • Interfaces DNS configuration

  • Improved WiFi 5G driver

  • flexiEdge UI improvements

  • STUN improvements (4.1.12)

  • Policy DIA fix (4.1.12)

  • From tunnel NAT fix (4.1.14)

  • Branch to DC fix (4.1.16)

  • Other bug fixes


Tunnels in this release are not compatible with releases prior to 4.1.X. When upgrading to this release, all organization devices should be upgraded for tunnels to be established.

Supported and Planned Features

The list of supported and planned features description can be found in the Feature Overview page

Please send us your feature needs and prioritization.

REST API changes in this release

List of REST API Changes



Backward Compatible?

ALL /devices/{id} - Interfaces

Add dnsServers, dnsSomains, useDhcpDnsServers fields


ALL /organizations

Add encryptionMethod field


Known Issues

List of Known Issues



UI hangs on Redis failure

When redis fails, UI might hang and not complete the request

During login, the username email is case sensitive

The email used in account creation and login is case sensitive

Slow websocket connection during heavy load

During heavy traffic load, device connection to flexiManage may be impacted

On unstable/slow connections some jobs may fail on timeout

In most cases the system recover itself by re-syncing the configuration

Switching WiFi from 2.4Ghz to 5Ghz doesn’t restart DHCP server

To restart the DHCP server for the WiFi interface, stop and start the flexiEdge router