Cisco L-SL-44-SEC-K9 | Security License for 4431/4451 | E-Delivery

About This Product

Buy Cisco L-SL-44-SEC-K9 | ISR 4400 Series Security (SEC) Technology Package License for ISR 4431 & ISR 4451-X | E-Delivery

This license on sale are available exclusively Traditional License.

The L-SL-44-SEC-K9 is the Cisco ISR 4400 Series Security (SEC) Technology Package License — the essential security feature unlock for your Cisco ISR 4431 and ISR 4451-X Integrated Services Routers. This Cisco 4400 Security license builds on the IP Base foundation to deliver a complete suite of enterprise-grade security capabilities including IPsec VPN, Next-Generation Firewall (NGFW), Intrusion Detection/Prevention (IDS/IPS), and Advanced Malware Protection — all running natively on your existing ISR 4400 hardware without additional appliances.

Also referenced as SL-44-SEC-K9, SL-44-SEC-K9=, or L-SL-44-SEC-K9=, this Cisco ISR 4400 security technology package is a perpetual, electronically delivered Right-to-Use (RTU) license. The SEC license unlocks: site-to-site and remote-access IPsec VPN for encrypted branch connectivity, Zone-Based Firewall (ZBFW) for granular traffic filtering, IDS/IPS for real-time threat detection and automated response, advanced malware protection against sophisticated cyber threats, DMVPN and FlexVPN for scalable secure WAN, and comprehensive security visibility and compliance reporting. For organizations handling sensitive data, regulated industries, or any deployment requiring production-grade network security, the Cisco 4400 SEC license transforms your ISR 4400 router into a full-featured secure gateway — no extra hardware, no additional footprint.

✅ Key Features

• • IPsec VPN — site-to-site and remote-access VPN with strong encryption for secure branch and remote user connectivity
• • Next-Generation Firewall (NGFW) — Zone-Based Firewall with application-aware filtering and granular access control
• • IDS/IPS — real-time intrusion detection and prevention with automated threat response and signature-based analysis
• • Advanced Malware Protection — protection against sophisticated malware, ransomware, and zero-day threats
• • DMVPN & FlexVPN — scalable, dynamic VPN architectures for multi-site secure WAN deployments
• • Security visibility & compliance — detailed traffic analytics, audit trails, and regulatory compliance reporting
• • Perpetual RTU license — one-time purchase, right-to-use activation, no recurring subscription or annual renewal fee

Compatible Platform

The SL-44-SEC-K9 Security license is exclusively 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). Requires a universalk9 IOS XE image with IP Base foundation. This is the securityk9 technology package — the prerequisite for the FL-44-HSEC-K9 high-security crypto license. Not compatible with ISR 4321, ISR 4331, ISR 4351, ISR 4461, or Catalyst 8000 Series routers. For higher feature requirements, consider SL-44-APP-K9 (AppX, includes SEC + WAAS + AVC). For voice/video, see SL-44-UC-K9 (Unified Communications).

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 Security feature set is immediately active.

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.