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Release Notice: LoadMaster LMOS

Release Notice: LoadMaster LMOS

Release Date: 27th April 2021


Upgrade Patch XML File Verification Notes:

By default, verification of the digital signature on upgrade images is required in LMOS 7.2.50 and above. See the Update Verification Options setting under System Administration > Miscellaneous Options > WUI Settings. If the unit you are upgrading is set to require validation, you'll need to supply the XML Verification File supplied with this release.

Note that:

  • In previous releases, two verification files were provided: one for pre-7.2.51 systems and one for later systems. This restriction has been removed with this release; use the same XML file regardless of the LMOS version from which you are upgrading.
  • LoadMasters running an LMOS version prior to 7.2.49 do not provide the option of XML file verification in the UI or API. If you are upgrading from one of these releases to this release, you can verify the digital signatures offline using a manual process documented on the support website.

If you are currently running LMOS 7.1.x or an earlier version, please see the article Kemp LoadMaster Firmware Upgrade Path for full upgrade path information.


Downgrading to Earlier Versions:

Downgrading a LoadMaster running LMOS 7.2.54 to LMOS 7.2.51 (or a later release) can be performed using any desired Update Verification Options setting.

Downgrading to LMOS 7.2.50 or a previous release can only be done when the Update Verification Options setting is set to Optional or Legacy. When performing the downgrade, do not specify an XML file. If you want to verify the digital signature on the image before downgrading, you can do so using a manual process documented on the support website.


Release Highlights:

New Features:

  • Enhanced Web Application Firewall (WAF)
    • We have introduced a number of enhancements on our Web Application Firewall (WAF) that will provide improved protection, visibility and reporting for your applications. Please see here for more detailed information including a comparison matrix on these enhancements.

      Action Required

      We recommend upgrading your LoadMaster to use the latest WAF feature. This will not affect your currently configured WAF implementation and provides access to all new functionality to enable migration planning.

      Legacy WAF rules are being retired on the 29th of June 2021 and no further updates will be available. The LoadMaster user interface will reflect this with the title ‘WAF Options (Legacy)’ in this release.

Download Links:

Download Current GA Feature Version -


Recommended Reading:

For full details on all the firmware updates, consult the LoadMaster Release Notes

To get the latest firmware updates please visit our Firmware Downloads page.