Cisco L-FL-44-HSEC-K9 | High Security License for 4431/4451 | E-Delivery

About This Product

Buy Cisco L-FL-44-HSEC-K9 | U.S. Export Restriction Compliance / High Security License for ISR 4400 Series | E-Delivery

This license on sale are available exclusively Traditional License.

The L-FL-44-HSEC-K9 is a Cisco U.S. Export Restriction Compliance / High Security (HSEC) License for the Cisco ISR 4431 and ISR 4451-X Integrated Services Routers. This Cisco 4400 Series HSEC license removes the U.S. government-imposed cryptographic throughput cap — unlocking your router's full hardware-accelerated IPsec VPN performance. Without HSEC, encrypted throughput is restricted to approximately 85 Mbps per direction regardless of the performance license installed. Once the FL-44-HSEC-K9 e-delivery license is applied, the export cap is lifted, enabling multi-gigabit IPsec VPN throughput when paired with the appropriate performance or booster license.

Also referenced as FL-44-HSEC-K9, FL-44-HSEC-K9=, or L-FL-44-HSEC-K9=, this Cisco ISR 4451 high security license is a permanent, non-evaluation software license that works in conjunction with the securityk9 technology package on a universalk9 IOS XE image. It is the essential prerequisite for any deployment requiring high-throughput IPsec VPN, large-scale DMVPN, GETVPN, FlexVPN, or secure SD-WAN edge connectivity beyond the default 85 Mbps crypto limit. Whether you are connecting branch offices, securing cloud backhauls, or deploying a regulated-industry encryption solution, the Cisco 4400 HSEC license is the mandatory key to achieving production-grade encrypted throughput on the ISR 4400 platform.

✅ Key Features

• • Removes the U.S. export-mandated 85 Mbps IPsec throughput cap — unlocks full hardware-accelerated crypto performance
• • Enables multi-gigabit IPsec VPN throughput when paired with FL-44-PERF-K9 (2 Gbps) or FL-44-BOOST-K9 (4+ Gbps)
• • Supports large-scale VPN deployments — DMVPN, GETVPN, FlexVPN, site-to-site IPsec, and secure SD-WAN
• • Perpetual license — one-time purchase, no recurring subscription, annual renewal, or term expiration
• • E-Delivery — license file delivered by email, activated via Cisco IOS XE CLI on the ISR 4400 Series
• • Compatible with all Cisco IOS XE universalk9 images — requires securityk9 technology package license
• • Covers both ISR 4431 and ISR 4451-X platforms with a single SKU — simplifies license procurement

Compatible Platform

The FL-44-HSEC-K9 HSEC license is compatible with the Cisco ISR 4431 (all models: ISR4431/K9, ISR4431-AX/K9, ISR4431-AXV/K9, ISR4431-SEC/K9, ISR4431-V/K9) and the Cisco ISR 4451-X (all models: ISR4451-X/K9, ISR4451-AX/K9, ISR4451-SEC/K9, ISR4451-V/K9). Prerequisites: universalk9 IOS XE image and securityk9 technology package license. Not compatible with ISR 4321, ISR 4331, ISR 4351, ISR 4461, or Catalyst 8000 Series routers. For ISR 4331, use FL-4330-HSEC-K9. For maximum encrypted throughput, pair with FL-44-PERF-K9 (performance) or FL-44-BOOST-K9 (boost) license.

Information Needed

To generate your license file, please send the output of show license udi from your Cisco ISR 4400 Series router to support@switchlicense.com, or leave a message online after placing your order. The license file is tied to your specific device UDI and cannot be transferred to another unit.

License Delivery

This Cisco software license is delivered electronically. Once your device UDI is confirmed, we will send you the .lic license file by email. No physical shipment is required — simply install the file on your ISR 4400 Series router and the full IPsec crypto throughput is immediately unlocked.

Warranty

We provide a 100% working warranty on all licenses. If the license file does not activate correctly on your device, we will resolve the issue at no additional cost. All payments are processed securely via PayPal for your peace of mind.