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QSS 4.5.0 build 20260908

2026-09-10

Applicable Models

  • QSW-IM3216
  • QSW-M321x
  • QSW-M3224
  • QSW-M7308R
  • QSW-M5218(P)
  • QSW-M7230(P)

Important Notice

  • MC-LAG Firmware Version Compatibility
  • Ensure that both switches in an MC-LAG configuration use the same firmware version.

New Features

Multiple Account Management
  • Added support for up to 16 local accounts with Administrator or Viewer roles, individual passwords, and account status controls.
Support for Second-Generation ADRA NDR
  • Expanded ADRA NDR integration to monitor downstream devices through related functions.
DoS Attack Prevention
  • Added detection and filtering for common denial-of-service attack patterns, including Land, Blat TCP/UDP, and Null Scan attacks.
Configurable Session Timeout
  • Added independent web and CLI inactivity timeouts, with web timeout options of 5, 10, 15, 30, or 60 minutes.
Dual Image Firmware Protection
  • Added two independent firmware partitions with active, next-boot, and backup image controls, including automatic fallback when the primary image cannot start.
PD Alive Check and Continuous PoE
  • Added LLDP- or ping-based Powered Device monitoring with alarm or power-cycle recovery actions, plus Continuous PoE to maintain power during switch restarts.
Expanded Command-Line Interface
  • Expanded CLI command coverage for configuring, monitoring, and troubleshooting switch functions.
Remote Syslog
  • Added remote Syslog delivery to up to five servers over UDP, TCP, or TLS, with configurable facility, severity, and timestamp settings.
AV-over-IP Network Profiles
  • Added predefined Network Profiles for AES67, Dante, NDI, Q-SYS, Audio-Technica, sACN, and Art-Net deployments, with advisory health status for applied settings.
Precision Time Protocol Boundary Clock
  • Added IEEE 1588v2 PTP Boundary Clock support on QSW-M7230(P)-2X4F24T for high-precision time synchronization using BMCA-selected master and slave ports.
Queue Statistics
  • Added real-time egress queue counters for traffic classes 0 through 7, along with VLAN ingress and dropped-packet monitoring in the web interface and CLI.
DHCP Relay
  • Added IPv4 DHCP Relay on supported Layer 3 models, with per-VLAN server configuration, up to eight relay servers, and DHCP Option 82 handling.
NIC Compatibility Mode
  • Added a per-port compatibility mode that adjusts hardware behavior for network adapters affected by throughput degradation.
Readable Configuration Backup and Restore
  • Added readable .conf backups in CLI command syntax, with editable and protected sections plus integrity validation for same-model restoration.

Enhancement

MC-LAG Configuration Without Restart
  • Improved MC-LAG so configuration changes can be applied without restarting the switch.
Diagnostic Log Guidance
  • Added clearer guidance that diagnostic log packages are encrypted and intended for QNAP Support analysis.
Stronger SSH Security
  • Added web-based SSH control and support for Ed25519 and RSA-SHA2-256/512 while removing the legacy ssh-rsa/SHA-1 algorithm.
Improved Dual Image Upgrade Guidance
  • Improved firmware upload validation and restart guidance for same-version upgrades, upgrades, downgrades, and manual Set as Boot operations.
Dual Image Compatibility Validation
  • Added firmware-partition and PoE MCU compatibility checks before automatic partition switching and restart.
Expanded Link Aggregation Support
  • Increased the maximum number of link aggregation groups according to the port count supported by each model.
Serial Number in System Information
  • Added the device serial number to the System Information page for easier identification and support.
IP Configuration Enhancements
  • Improved IP configuration pages with clearer gateway and DNS information, guidance links, and display-only handling for automatically assigned entries.

Fixed Issues

  • Improved the stability and reliability of MC-LAG, DHCP Relay, PTP, and related network services.
  • Improved the reliability of firmware management and configuration backup and restore operations.
  • Fixed several issues affecting account management, CLI configuration, and remote logging.
  • Fixed various user-interface, event-log, help-text, and localization issues.
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