Cisco L-SL-4350-SEC-K9 | Security License for ISR 4351 | E-Delivery

About This Product

Buy Cisco L-SL-4350-SEC-K9 | ISR 4351 Security Technology Package License | E-Delivery

The L-SL-4350-SEC-K9 is a Cisco ISR 4351 Security Technology Package License — the comprehensive security feature set for the high-performance Cisco ISR 4351 Integrated Services Router. This Cisco ISR 4351 SEC license activates Zone-Based Firewall (ZBFW), IPsec VPN with IKEv2, DMVPN, GET VPN, FlexVPN, and SSL VPN with 200 Mbps base throughput, making it the essential upgrade for enterprise campus, data center edge, and large regional hub deployments that require carrier-grade security with the highest throughput in the ISR 4000 family.

Also referenced as SL-4350-SEC-K9 or L-SL-4350-SEC-K9=, this Cisco ISR 4351 Security license is a perpetual IOS XE Smart License that transforms the ISR 4351 into a full-featured high-throughput secure WAN platform. The license includes Zone-Based Policy Firewall for granular inter-zone traffic control at wire speed, IKEv2/IPsec VPN with hardware-accelerated AES-GCM encryption, DMVPN for large-scale dynamic hub-and-spoke VPN fabrics, GET VPN for any-to-any group encryption, FlexVPN for unified IKEv2-based policy-driven VPN, SSL VPN for high-concurrency clientless remote access, and Network Foundation Protection for comprehensive DDoS defense. For unlimited crypto throughput and tunnel capacity, pair with FL-4350-HSEC-K9. Whether securing a campus WAN edge or building an enterprise encrypted backbone, the ISR 4351 SEC license e-delivery delivers maximum security on the highest-performance ISR 4000 platform.

✅ Key Features

• • Zone-Based Policy Firewall (ZBFW) — high-throughput stateful inspection with per-zone security policies for wire-speed inter-segment traffic control
• • IKEv2/IPsec VPN with AES-GCM — hardware-accelerated AES-GCM encryption delivering high-throughput site-to-site and remote-access VPN
• • DMVPN and FlexVPN — large-scale Dynamic Multipoint VPN for hub-and-spoke fabrics and FlexVPN for unified IKEv2 policy-driven configuration
• • GET VPN — Group Encrypted Transport VPN for any-to-any encrypted group communication with minimal overhead at scale
• • SSL VPN (WebVPN) — high-concurrency clientless browser-based remote access for large enterprises with flexible access policies
• • Network Foundation Protection — enterprise-grade control-plane policing and secure management for comprehensive infrastructure defense
• • Perpetual License — one-time purchase,  no recurring subscription fees
• • Ideal for campus WAN security, data center edge, and enterprise encrypted backbone on the highest-performance ISR 4000 platform

Compatible Platform

The L-SL-4350-SEC-K9 is exclusively compatible with the Cisco ISR 4351 Integrated Services Router running IOS XE. Requires IOS XE software version 16.x or later with Smart Licensing enabled. Base throughput is 200 Mbps; for unlimited crypto throughput and IPsec tunnels, pair with FL-4350-HSEC-K9. For higher aggregate throughput, add FL-4350-PERF-K9 (400 Mbps) and FL-4350-BOOST-K9. Not compatible with ISR 4221, ISR 4321, ISR 4331, or ISR 4431/4451/4461 — each platform requires its own license SKU. Please verify your router model before purchase.

Information Needed

To generate your license file, please send the output of show license udi from your Cisco ISR 4351 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 ISR 4351 Security technology package license is delivered electronically. Once your device UDI is confirmed, we will send you the license entitlement by email. No physical shipment is required .

This license on sale are available exclusively Traditional License.

Warranty

We provide a 100% working warranty on all licenses. If the license 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.