After referencing the publication year in the version since 2012, Tufin now has introduced the new naming convention - starting with 5.0.00 (even if that version number has already been published in 2010/2011).

Starting with 5.0.00 Tufin will provide major versions (PGA) and hotfixes (PHF), respectively. Regarding versions this needs to be considered

• Platform version, e.g. TOS 5, TOS 6
• Initial release version, e.g. 5.0.00, 6.0.00 -> not for production
• Feature version, e.g. 5.1.0, 5.2.0 with feature enhancements, bug fixes, but hardly any infrastructure changes

In version 5.1.0 some new features and options have been integrated

• Operating System:
  TOS can now be installed on Red Hat Enterprise Linux 9 and Rocky Linux 9 operating systems
  
  
• For Amazon AWS, TOS now supports not only SDKv1, but also SDKv2 for AWS Monitoring. SDKv1 has reached End of Support.
• Amazon AWS RDS instances are now visible in TOS. It requires AWS SDKv2 and delivers some advantages (details here).   
• Amazon AWS accounts can be monitored by TOS, i.e. AWS opt-in regions using assume role authorization. SDKv2 required.
• Arista VeloCloud SD-WAN devices can now be monitored by TOS
  Please follow these links to find information about feature support in SecureTrack and SecureChange.
• Cisco IOS-XE SDWAN (cEdge) - GRE Tunnel is supported by TOS now, more here.
• Regarding Cisco FMC, FQDN objects are supported now in SecureTrack and SecureChange.
• In Microsoft Azure, TOS now supports VNet flow logs when configured correctly.
  
  
• Tufin AI support is integrated, allowing e.g. own dashboards and reports.

TOS 5.1.0 is available in the Download Section of the Tufin Portal: https://portal.tufin.com (authentication required).