I also have a 2 Gbps connection and nothing is throttled here.
What’s your actual internet speed? Quite a few people here, including Comodo staff, have confirmed the issue. Comodo Firewall Driver throttling 2Gbps Fiber connection - #4 by Gene
Do you use the NDIS or the NetAdapterX driver ?
I use Windows 11 which uses the latter more modern drivers.
I think Windows 10 uses the old NDIS.
This is what AI says about it:
NetAdapterCx (Network Adapter Class Extension) is a newer, highly efficient Windows driver model designed for modern high-bandwidth architectures. NDIS (Network Driver Interface Specification) is a legacy model that can bottleneck multi-gigabit connections, particularly if it lacks proper hardware offloading support for speeds above 1 Gbps.
Several factors dictate how these drivers handle a 2 Gbps connection:
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Hardware Offloading: NDIS drivers frequently fail to engage hardware acceleration at speeds above 1 Gbps, shifting the packet processing burden onto your CPU, which creates a data bottleneck.
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Power Saving Features: Many legacy NDIS drivers default to aggressive power-saving states (like Energy Efficient Ethernet or Green Ethernet), which can throttle or drop link speeds to 1 Gbps or 100 Mbps. NetAdapterCx drivers handle power management directly via the OS, which prevents this.
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CPU Overhead: NetAdapterCx serializes input directly into queues and relies on polling-based I/O to distribute interrupts efficiently across CPU cores. NDIS lacks this optimization, leading to latency and throttling on high-throughput transfers.
In the link you posted no Comodo staff confirmed the issue and only Gene said that is a known issue without further prove.
What Windows version you are using and what motherboard you have ?