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SynLink Firmware Changelog

A historical listing of all firmware updates, enhancements, and fixes for SynLink PDUs.

2.5.102

Released: May 12, 2025

New features and improvements

  • Support added for on-premises Synaccess Central Management Portal
  • More comprehensive data logging
  • Improvements for CMP integration

2.5.98

Released: February 17, 2025

New features and improvements

  • Internal OS enhancements
  • RADIUS now functional in bridged mode
  • LTE functionality improvements

Fixes

  • IPv6 disabled by default for compatibility and security

2.5.96

Released: January 18, 2025

New features and improvements

  • Security hardening
  • Improved internal diagnostic logging

2.5.95

Released: January 18, 2025

New features and improvements

  • Internal OS enhancements
  • Auto-ping functionality now working in bridged mode

2.5.94

Released: January 6, 2025

New features and improvements

  • IPv6 support added
  • Syslog TCP encryption added
  • Self-hosted Synaccess Portal functionality added
  • Security enhancements
  • CLI and shell improvements

2.5.93

Released: November 21, 2024

New features and improvements

  • Internal OS improvements
  • Additional endpoints to clear monthly kWh logs

2.5.90

Released: October 31, 2024

New features and improvements

  • Configuration API enhancements

Fixes

  • Bug fixes for networking bridged mode
  • Various system stability fixes

2.5.88

Released: August 21, 2024

New features and improvements

  • Improvements to NTP usage
  • Improvements to controller reboot behavior
  • Improvements to cloud pairing behavior

Fixes

  • Leak detection bug fix for improper characters

2.5.87

Released: July 31, 2024

New features and improvements

  • Security improvements for multiple networking protocols

2.5.86

Released: July 17, 2024

New features and improvements

  • Additional sensor port options and configurations

Fixes

  • Bug fix for web POST HTTP actions for sensor data

2.5.83

Released: July 9, 2024

Fixes

  • SMTP header formatting updated to conform to RFC requirements

2.5.81

Released: May 6, 2024

Fixes

  • Outlet state setting bug fix
  • Default gateway configuration bug fix
  • Firmware update reboot hang fix

2.5.80

Released: April 29, 2024

New features and improvements

  • Ability to globally enable or disable event monitoring based on time and day
  • Security patches
  • Additional validation for user inputs, blocking disallowed special characters
  • Auto-ping now defaults to the primary network interface
  • Netbooter CLI support

Fixes

  • Fix for device power-up hang issue
  • Fix for system resource leaks

2.5.79

Released: March 6, 2024

New features and improvements

  • Override DNS DHCP option added
  • Added “time executed” field for triggered events
  • Added “counter since event triggered”
  • Performance enhancements

Fixes

  • LCD display bug fix on three-phase models
  • Outlet CLI help section fix

2.5.75

Released: December 12, 2023

New features and improvements

  • Smart hub support
  • PAT support when updating firmware
  • Enhanced security for multiple temperature sensors per port
  • Stricter password requirements
  • Web page auto logout when idle
  • Password expiration
  • Account lockout after repeated unsuccessful login attempts
  • Manual lock and unlock controls for user accounts
  • USB port can be configured as COM mode
  • Auto login in serial console
  • Device name displayed in web app sidebar
  • Device name included in email alerts

Fixes

  • DHCP gateway reporting fix in bridged mode
  • Temperature sensor LCD reporting fix

2.5.73

Released: November 7, 2023

New features and improvements

  • Option to disable TLS versions lower than TLS 1.2 (enabled by default)

2.5.72

Released: November 2, 2023

New features and improvements

  • SNMP OIDs added for event trigger state and event trigger time

2.5.71

Released: October 23, 2023

Fixes

  • Bug fix for networking configuration changes

2.5.68

Released: October 10, 2023

New features and improvements

  • Security update for additional security protocols

2.5.67

Released: October 9, 2023

New features and improvements

  • DNS nameservers now supplied by DHCP
  • Security update for cloud connectivity

2.5.66

Released: August 18, 2023

New features and improvements

  • Power readings added for 120 V / 208 V PDU models

Fixes

  • Sensor connectivity bug fix

2.5.64

Released: June 13, 2023

New features and improvements

  • Error reporting added when cloud pairing fails
  • Support added for inlet plug IEC 60309 316P6

2.5.62

Released: June 8, 2023

Fixes

  • Fixed non-responsive behavior when incorrect credentials are used during login

2.5.61

Released: April 6, 2023

New features and improvements

  • Support added for 120/208 V three-phase PDUs
  • Factory reset and control module pairing process updated

2.5.60

Released: March 21, 2023

New features and improvements

  • Support added for a new triple-circuit/input 36-outlet PDU
  • Reduced redundant logging

2.5.58

Released: March 16, 2023

New features and improvements

  • Cloud support added (disabled by default)
  • RADIUS remote authentication support added
  • HTTPS POST action support added
  • Quad circuit support added
  • Control module re-pair behavior improved

2.5.57

Released: December 6, 2022

Fixes

  • Gateway IP display fix on LCD screen
  • Networking issues fixed for select routes with multiple network interfaces

2.5.55

Released: September 13, 2022

New features and improvements

  • Support added for quad-circuit configuration PDUs
  • Support added for WYE three-phase PDU configurations

2.5.51

Released: July 5, 2022

New features and improvements

  • LDAP remote authentication added
  • LDAP configuration testing tool added
  • 30-minute timeout added for the web interface
  • Outlet grouping added
  • Navigation improved for selected configuration pages

2.5.49

Released: May 18, 2022

New features and improvements

  • Weekly event triggers added
  • Mining OS only: Slush API passthrough update
    (contact us directly for Mining OS firmware)

Fixes

  • x-axis mislabeling fix on line charts
  • Bug fix when flushing logging data

2.5.48

Released: April 21, 2022

New features and improvements

  • Monthly kWh consumption tracking added
  • “Reset kWh” action added for automation
  • Monthly event triggers added
  • Secondary and backup network interface support added via USB–Ethernet dongle
  • IP access control added for cellular code bases only
  • Mining OS only: preset mining events, miner API passthrough, and Bitcoin exchange rate LCD behavior
    (contact us directly for Mining OS firmware)

2.5.47

Released: March 9, 2022

New features and improvements

  • Support added for SynLink Switched modules
  • Current RMS reporting added

2.5.45

Released: May 18, 2022

Fixes

  • SNMP sysLocation and sysContact field bug fix

2.5.41

Released: March 2, 2022

New features and improvements

  • sysContact, sysName, and sysLocation fields added on web interface for SNMP

2.5.40

Released: February 16, 2022

Fixes

  • Fixed SNMP not reporting beyond IP address when booting after factory reset
  • Fixed apparent power reporting for each outlet in SNMP

2.5.38

Released: February 16, 2022

New features and improvements

  • Replaced watts as unit of measurement with apparent power

2.5.37

Released: January 31, 2022

New features and improvements

  • Faster auto-ping interval and auto-ping timeout options
  • Power measurements added to outlet API

2.5.36

Released: January 26, 2022

New features and improvements

  • Configuration backup and restore functionality added
  • Ethernet passthrough Realtek r8512 driver added
  • SSL keys and certificates regenerated more frequently
  • SSL certificate validity extended to 20 years
  • Outlet info screensaver added
  • “Mini leaf” for Banyan support added
  • Bitcoin screensaver added
  • SMS command “outlet status all” added
  • Action added to trigger other PDUs

Fixes

  • NTP drift error fix

2.5.33

Released: December 10, 2021

New features and improvements

  • Ability added to use outlet relay as an action
  • Ability added to use outlet index to modify outlet state or configuration instead of outlet UUID

Fixes

  • Fix for bankCurrentRms not updating for banks 2, 3, and higher via SNMP
  • Fix for erroneous inlet line current RMS in SNMP

2.5.31

Released: November 5, 2021

New features and improvements

  • SNMPv3 trap settings configuration added
  • SNMPv3 enable and snmp_port configuration added
  • SNMPv3 settings added on users
  • SNMPv3 trap action added
  • SNMPv3 authentication role permissions added

2.5.30

Released: October 18, 2021

Fixes

  • Horizontal LCD screensaver fix for three-phase PDUs

2.5.29

Released: October 15, 2021

New features and improvements

  • Circuit breaker type selection updated to Single Pole / Double Pole

2.5.28

Released: October 8, 2021

New features and improvements

  • ATS added to warning events on the frontend

2.5.6

Released: July 14, 2021

New features and improvements

  • Flag added to hide logs for outlet switching
  • Syslog format reverted to traditional
  • Enable or disable switch added for outlet switching logs
  • Outlet action section renamed in system outlet item page
  • User activity logs in overview page reordered

Fixes

  • Flush logs notification message fix
  • Graceful shutdown button renamed

2.5.5

Released: July 7, 2021

New features and improvements

  • CLI keywords for outlet set commands updated
  • Ability added to change global reboot time via CLI
  • WebSocket event history trigger states added
  • Graceful shutdown command renamed on web interface
  • Help menu added for LCD settings
  • Batch operation on web interface skips outlets already in intended state and informs users when all are already switched
  • Type field removed in CLI settings port set
  • portAExpansionPwrShare settings hidden

Fixes

  • Validation fixes for global reboot time
  • Factory reset bug fix for pwrOnState not resetting

2.5.4

Released: July 2, 2021

New features and improvements

  • Batch operation for outlet switching added on web interface
  • Help icons added throughout web interface next to inputs and data rows
  • “Pending reboot” status added to outlet sections when rebooting
  • USB firmware update section added on web interface
  • Data fetch behavior improved when components mount
  • JSON commands separated for CLI
  • Example sections added to CLI IP configuration
  • Help menus reworded for clarity in CLI
  • USB firmware update functionality added

2.5.3

Released: June 30, 2021

Fixes

  • Error message fix for PUT /api/inlet web API for inlet energy accumulation

2.5.2

Released: June 29, 2021

New features and improvements

  • Ping command added to CLI
  • “Last updated” coloring added on web interface
  • Firmware version shown in side header of web interface
  • HTTPS redirect disabled when HTTP is disabled
  • Data reloads improved on frontend navigation changes

2.5.1

Released: June 24, 2021

New features and improvements

  • Warning label added on frontend for IP and web changes

Fixes

  • Fix for issue when clearing logs; user is prompted
  • Fix for user initialization issue with SSH keys

2.5.0

Released: June 24, 2021

New features and improvements

  • Factory reset now resets power-up state and energy accumulation
  • Factory reset now clears log files
  • Default action created for SynLink Switched and Switched Pro+ during reset
  • Test ping command added
  • Invalid hosts allowed for auto-ping triggers
  • Trigger state added to event trigger object
  • Limits added for number of groups, actions, events, and SSH keys
  • Proper error responses when reaching maximum counts or violating uniqueness constraints
  • Example commands added in CLI
  • Telnet disabled by default
  • Output relay model support added in CLI and HTTP
  • Session cookie expiration changed to 24 hours

2.4.3

Released: June 9, 2021

Fixes

  • Telnet module issues fixed

2.4.1

Released: June 8, 2021

New features and improvements

  • Warning messages added when changing SSH, IP, or web settings
  • Password static text type added for web interface
  • SSH session now resets when SSH settings change

2.4.0

Released: June 4, 2021

New features and improvements

  • Ability to set time manually added
  • Polyfill added to support more legacy browsers on frontend
  • Personal access token functionality added for web API
  • Diagnostics info page added
  • System logs added for changes to settings, outlets, banks, groups, and inlets
  • Button added for graceful shutdown

Fixes

  • Bugs fixed when deleting SSH keys from web interface

2.3.1

Released: May 17, 2021

New features and improvements

  • Permissions added for additional shell commands
  • Configuration issues resolved for outlet settings on web interface

2.3.0

Released: May 13, 2021

New features and improvements

  • Logging page added for event trigger logging, internal logging, and user logging in web API and web interface
  • Groups functionality added to CLI
  • Ability to configure ports and display them in CLI added

2.2.2

Released: April 21, 2021

New features and improvements

  • User role permission checking enforced in CLI

Fixes

  • Firmware update issue on web interface fixed

2.2.1

Released: April 20, 2021

Fixes

  • Modem CLI bugs fixed
  • CLI outlet JSON output bugs fixed
  • Version reporting issues fixed

2.2.0

Released: April 19, 2021

New features and improvements

  • Configurable outlet boot state added and controllable via web interface
  • Modem functionality added to CLI
  • Hardware and firmware reporting added
  • SSH key functionality added