TrueNAS Stable Version Documentation
This content follows TrueNAS 25.04 (Fangtooth) releases.
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TrueNAS 25.04 (Early)
2 minute read.
25.04 Fangtooth
TrueNAS 25.04 (Fangtooth) brings many new features and improvements to the TrueNAS experience:
NFS over RDMA support (Enterprise Feature - see Configuring the NFS Service)
Fibre Channel support (Enterprise Feature)
iSCSI XCOPY support through ZVOL block cloning (NAS-130017).
Versioned TrueNAS JSON-RPC 2.0 over WebSocket API with new and improved API documentation (see API Reference)
User-linked API Keys (see Managing API Keys)
Improved UI Login Experience (NAS-130810)
Improved STIG Compliance and Security Focus (Enterprise Feature - NAS-127235)
Enable support for ZFS Fast Deduplication (NAS-127088)
New experimental Instances (formerly Virtualization) features.
TrueNAS 25.04 replaces the previous libvirt implementation (TrueNAS 24.10 and earlier) with Incus for virtual machine (VM) deployment. It also introduces support for Linux system containers (LXC), enabling lightweight isolation similar to jails in TrueNAS CORE.
Instances are an experimental feature intended for community testing only. Users with production VMs on TrueNAS 24.10 should not upgrade to TrueNAS 25.04 until after this experimental feature stabilizes in a future TrueNAS release.
See Migrating Virtual Machines for more information.
Improvements to the TrueNAS apps service, including per-app selection of IP addresses (See TrueNAS Apps in the Upgrade Notes).