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ICR-OS 6.6.1 Firmware Release


Written by Miloslav Bien on Monday 4 May 2026 in the category Firmware.

The latest ICR-OS release is here. Version 6.6.1 brings a focused set of stability fixes and incremental enhancements to Advantech cellular routers. As with all new releases, routers leaving our production line will come pre-installed with this firmware.

What Changed?

1. VXLAN Tunnel Support Introduced: Create isolated Layer 2 networks that span multiple sites using VXLAN tunnels. This enables seamless connectivity between geographically distributed offices or data centers, allowing devices on separate physical networks to communicate as if they were on the same local network.

2. Dynamic DNS Functionality Extended: Added support ...

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ICR-OS 6.6.0 Firmware Release


Written by Jakub Zikuška on Monday 5 January 2026 in the category Firmware.

Advantech is excited to announce the latest version of ICR-OS, the proprietary firmware for our cellular routers. This major release brings a range of new features and improvements aimed at enhancing both the functionality and security of our routers.

Detailed Changelog

For a full breakdown of the advancements and changes in this release, we encourage you to review the official Release Notes.

Major Enhancements

1. ETH0 Configuration Expanded: Extended configuration options for the switched ETH0 port on ICR-25xx/26xx and ICR-44xx. Switched routers now support per-port enable control, individual Media Type selection, and ...

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ICR-OS 6.5.4 Firmware Release


Written by Jakub Zikuška on Tuesday 22 July 2025 in the category Firmware.

Advantech is excited to announce the latest version of ICR-OS, the proprietary firmware for our cellular routers. This minor bugfix release addresses several small issues to improve the stability and reliability of our routers. All newly assembled routers will come with this firmware version pre-installed.

Detailed Changelog

For a full breakdown of the advancements and changes in this release, we encourage you to review the official Release Notes.

Major Enhancements

1. IPsec NAT Rule Handling Resolved: Resolved an issue where internal NAT rules were not properly removed.

2. Verizon Connectivity on ICR-41/4271 Fixed: Fixed a connectivity issue affecting ...

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ICR-OS 6.5.3 Firmware Release


Written by Jakub Zikuška on Thursday 29 May 2025 in the category Firmware.

Advantech is excited to announce the latest version of ICR-OS, the proprietary firmware for our cellular routers. This major release brings a range of new features and improvements aimed at enhancing both the functionality and security of our routers. All newly assembled routers will come with this firmware version pre-installed.

Detailed Changelog

For a full breakdown of the advancements and changes in this release, we encourage you to review the official Release Notes.

Major Enhancements

1. Cellular Synchronization with Date and Time Added: Added possibility to synchronize date and time with the cellular network.

2. ...

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ICR-OS 6.5.2 Firmware Release


Written by Michal Hašek on Wednesday 12 February 2025 in the category Firmware.

Advantech is excited to announce the latest version of ICR-OS, the proprietary firmware for our cellular routers. This major release brings a range of new features and improvements aimed at enhancing both the functionality and security of our routers. All newly assembled routers will come with this firmware version pre-installed.

Detailed Changelog

For a full breakdown of the advancements and changes in this release, we encourage you to review the official Release Notes.

Major Enhancements

1. WireGuard Tunnel Subnets Capacity: Increased the maximum number of Remote subnets in the WireGuard tunnel configuration from ...

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ICR-OS 6.5.1 Firmware Release


Written by Michal Hašek on Tuesday 19 November 2024 in the category Firmware.

Advantech is excited to announce the latest version of ICR-OS, the proprietary firmware for our cellular routers. This major release brings a range of new features and improvements aimed at enhancing both the functionality and security of our routers. All newly assembled routers will come with this firmware version pre-installed.

Detailed Changelog

For a full breakdown of the advancements and changes in this release, we encourage you to review the official Release Notes.

Major Enhancements

1. Minimum Severity Syslog Configuration: The Minimum Severity setting has been added to the Syslog service configuration across all platforms.

2. ...

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ICR-OS 6.5.0 Firmware Release


Written by Roman Peťura on Thursday 10 October 2024 in the category Firmware.

Advantech is excited to announce the latest version of ICR-OS, the proprietary firmware for our cellular routers. This major release brings a range of new features and improvements aimed at enhancing both the functionality and security of our routers.

Detailed Changelog

For a full breakdown of the advancements and changes in this release, we encourage you to review the official Release Notes.

Major Enhancements

1. VLAN Tagging: Added support for VLAN tagging (IEEE 802.1Q), enabling better network segmentation.

2. Sites Blocking: New configuration options under the Firewall section allow for the blocking of specific ...

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ICR-OS 6.4.2 Firmware Release


Written by Roman Peťura on Thursday 23 May 2024 in the category Firmware.

A new version of ICR-OS, the proprietary firmware developed for Advantech routers has been released. This patch-level release is packed with security enhancements, functional improvements, and several key updates that elevate router performance and reliability.

Detailed Changelog

To dive into the specifics of what's new and improved, we highly recommend reviewing the Release Notes. They provide a thorough overview of the advancements and modifications introduced in this update.

Major Enhancements

  • Added jq Command: Support for better JSON file manipulation.
  • SSH Port Configuration: The default listening SSH port can now be configured.
  • WiFi Connectivity Issues: Fixed ...

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ICR-OS 6.4.1 Firmware Release


Written by Roman Peťura on Monday 25 March 2024 in the category Firmware.

A new version of ICR-OS, the proprietary firmware developed for Advantech routers has been released. This patch-level release is packed with security enhancements, functional improvements, and several key updates that elevate router performance and reliability.

Detailed Changelog

To dive into the specifics of what's new and improved, we highly recommend reviewing the Release Notes. They provide a thorough overview of the advancements and modifications introduced in this update.

Major Enhancements

  • WiFi Module Insights: The WiFi Status page now includes additional details about the WiFi module, enhancing transparency and control over wireless ...

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ICR-OS 6.3.12 Firmware Release


Written by Roman Peťura on Monday 25 March 2024 in the category Firmware.

A new ICR-OS firmware version, specifically designed for the v2 product line of Advantech routers, has been released.

Detailed Changelog

To dive into the specifics of what's new and improved, we highly recommend reviewing the Release Notes. They provide a thorough overview of the advancements and modifications introduced in this update.

Major Enhancements

  • SNMP Custom Field Enhancement: This enhancement adds greater flexibility to SNMP configurations, allowing users to store and manage extra information for effective network management and monitoring.
  • Resolved Firmware Auto-update Issue: We've addressed a bug that caused firmware auto-update processes to crash, ...

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