Operating Systems

Debian 10.8.0 AMD64 (needed for release 4.0 or later) click here (Note: This is a “netinstall” image that requires Internet access to properly install.)

Debian 8.10.0 AMD64 ISO Image (Note: This is a “netinstall” image which requires Internet access to properly install.)

Tech Bulletins

Patch 1 for version 5.0.0.760 #TSB-C4-2023-03 (released 7/6/2023)

Nyquist Firmware 3.0.678 #TSB-C4-2023-04 (released 8/17/2023)

Nyquist Firmware 3.0.679 #TSB-C4-2023-05 (released 9/21/2023)

Patch for Nyquist System Controller #TSB-C4-2023-06 (released 11/30/2023)

Nyquist Firmware 3.0.680 #TSB-C4-2023-07 (Released 12/12/2023)

Nyquist Firmware 3.0.686 #TSB-C4-2024-01 (Released 4/17/2024)

Patch 1 for version 4.0.0.310 #TSB-C4-2022-01 (released 4/27/2022)

Patch 4 for version 3.0.0.555 #TSB-C4-2022-02 (released 4/27/2022)

Nyquist Firmware Update for Nyquist C4000 S/W Release 4.0 #TSB-C4-2022-03 (released 5/15/2022)

Nyquist Firmware Fixes for Nyquist C4000 and Nyquist Standalone Appliances #TSB-C4-2022-04 (released 6/15/2022)

Google's Changes to Gmail Security #TSB-C4-2022-05 (released 6/28/2022)

Critical Patch Available for Nyquist C4000 S/W Release 4.0 #TSB-C4-2022-06 (released 8/22/2022)

Nyquist Firmware Update for Nyquist C4000 S/W Release 4.0 and Nyquist Standalone Appliances #TSB-C4-2022-07 (released 9/23/2022)

Nyquist Firmware Update for Nyquist C4000 S/W Release 4.0 #TSB-C4-2023-01 (released 2/3/2023)

Patch 3 for Version 4.0.0.310 #TSB-C4-2023-02 (released 4/11/2023)

Patch 3 for version 3.0.0.555 #TSB-C4-2021-04 (released 9/2/2021)

Patch 2 for version 3.0.0.555 #TSB-C4-2021-03 (released 6/3/2021)

Patch 1 for version 3.0.0.555 #TSB-C4-2021-02 (released 3/31/2021)

Important Network Setup Guidelines needed for upgrading to version 3.0.0.555 #TSB-C4-2021-01 (released 2/25/2021)

Tech Bulletin - C4000 Dashboard Compatibility Issue with Chrome Version 87.0.4280 (dated 12/10/2020)

Tech Bulletin C4000 Software and Firmware Update

Tech Bulletin C4000 End User License Agreement (added 3/11/19)

Server Software

C4000 Software General Release 5.0.0.740 (Released 5/16/23)

C4000 Software General Release 4.0.0.310 (released 12/16/2021) (Note: This software requires a valid License Activation Key to install and Internet access to activate.)

Nyquist C4000 Software General Release 3.0.555 (released 2/18/2021) (Note: This software requires a valid License Activation Key to install and Internet access to activate.)

Nyquist C4000 Software General Release 2.0.0.419 (released 12/05/2019) (Note: This software requires a valid License Activation Key to install and Internet access to activate.) If you downloaded Nyquist C4000 Software General Release 2.0.0.419 before Jan. 1, 2020, download the file again and perform a System Update.

Software Version 3.x.x Patch Release Notes

C4000 3.0.0.555 Patch 4 Release Notes

Tech Notes

C4000 Tech Note 2.0.0.419 Cisco ATA 191 Device Support Patch 2 (released 6/25/2020)

C4000 Tech Note 2.0.0.419 Patch 1 (released 2/5/2020)

C4000 Tech Note System Controller Host Name Resolution Patch (released 12/10/19)

C4000 Tech Note Controller Setup Wizard Patch (released 08/08/19)

Appliance Firmware and Tech Notes

NOTE: The appliance firmware for a given release is distributed as part of the server software package to ensure compatibility. As such, only subsequent updates to appliance firmware will appear in this section.

C4000 3.0 Firmware (Released 5/16/23)

C4000 3.0.678 Firmware (Released 8/17/23)

C4000 3.0.679 Firmware (Released 9/21/23)

C4000 3.0.680 Firmware (Released 12/12/23)

C4000 3.0.686 Firmware (Released 4/17/24)

C4000 Appliance Firmware 1.2.1657 (released 3/24/2021)

C4000 Appliance Firmware 2.0.611 (released 5/17/2022)

C4000 and Standalone Appliance Firmware Patch 2.0.615 (released 6/15/2022)

C4000 and Standalone Appliance Firmware Patch 2.0.623 (released 9/23/2022)

C4000 Appliance Firmware 2.0.627 (released 2/3/2023)

C4000 Appliance Firmware 1.2.1647 (released 2/18/2021)

C4000 Appliance Firmware 1.2.1059 (released 7/30/2020)