Full English Description for Cisco ASA5510-K8
1. Official Short Order Description
Cisco ASA5510-K8: Mid-tier rack-mount legacy Adaptive Security Appliance from Cisco ASA 5500 Series, base DES-only license variant for medium branch offices. Equipped with five fixed 10/100 Fast Ethernet ports (Outside, Inside and three multi-purpose DMZ interfaces), 1 expansion slot for AIP-SSM intrusion prevention or CSC-SSM content security modules, running Cisco ASA OS 8.x / 9.x. Powered by Cisco Adaptive Security Algorithm, it delivers stateful SPI firewall, IPsec IKEv1/IKEv2 site-to-site & remote access VPN, basic IDS, NAT/PAT, PPPoE, VoIP fixup inspection and stateless Active/Standby failover. Performance: up to 300 Mbps cleartext firewall throughput, 130,000 maximum concurrent TCP/UDP connections, 50 simultaneous IPsec VPN tunnels, 50 logical routed VLAN interfaces. K8 license limited to DES encryption, no multi-context virtual firewall capability, restricted TLS proxy sessions. Managed via serial CLI, embedded ASDM web GUI, Cisco Security Manager (CSM), Syslog and SNMPv3. Fully End-of-Sale (2018) and End-of-Support (2023) obsolete hardware, superseded by ASA 5512-X next-gen firewalls.
2. Complete Detailed Product Overview
Product Line Positioning
The Cisco ASA5510-K8 sits between entry desktop ASA5505 and higher ASA5520/5540 models, designed for medium branch, multi-segment DMZ and regional VPN hub deployments requiring expandable modular security services. It uses a dedicated rack-mount chassis without integrated PoE switch ports, supporting external switches for scalable LAN segmentation.
The K8 suffix denotes a base export license bundle restricted to DES encryption only, with capped VPN tunnel capacity and no multi-context virtual firewall support; the Security Plus K9 bundle unlocks 3DES/AES strong crypto, 150 VPN peers and multi-context Active/Active failover. The platform reached EoS in 2018 and EoS in 2023; no official firmware patches, vulnerability fixes or Cisco TAC technical support are available today.
Physical Hardware & Modular Architecture
Form Factor & Mechanical Specifications
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Standard 1U 19-inch rack-mount metal chassis, optional rubber feet for desktop placement
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Single internal universal AC power supply (100–240V auto-switch); redundant power supplies not supported
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Front panel multi-color LED indicators: Power, System Fault, Module Status, Global Traffic Activity
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Integrated physical security lock slot for anti-tampering protection
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Hardware core: 1.6 GHz Intel Celeron processor, base 256 MB SDRAM (cannot be field-upgraded), 64 MB flash storage for ASA OS, configurations and event logs
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One horizontal SSM expansion slot for field-installable security service modules (AIP-SSM-10/20 IPS, CSC-SSM content filtering)
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Dual USB 2.0 rear ports for flash storage backup, firmware upgrades and log archiving
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Environmental compliance: 0°C to +40°C operating temperature, 10%–90% non-condensing humidity, FCC Class A, CE certified
Rear Panel Fixed Port Layout
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5 × 10/100 Fast Ethernet Auto-MDI/MDIX RJ45 Ports (Ethernet0/0 – 0/4)
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Eth0/0: Default Outside untrusted WAN uplink for cable/DSL routers
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Eth0/1: Default Inside trusted LAN interface
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Eth0/2, Eth0/3, Eth0/4: Multi-purpose DMZ/secondary WAN/managed segmentation ports for multi-zone network isolation
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RJ45 RS-232 Serial Console Port
Out-of-band CLI management at 9600 baud for bootstrap, password recovery and offline config editing
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2 × USB 2.0 Storage Ports
Supports external USB flash drives for config backup and OS image deployment
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SSM Expansion Slot Bay
Compatible modules:
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AIP-SSM-10 / AIP-SSM-20: Hardware inline intrusion prevention
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CSC-SSM-10 / CSC-SSM-20: Web filtering, anti-spam, antivirus content security
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IEC AC Power Input Socket
Integrated internal power supply with standard detachable power cord
Core Performance & K8 Base License Restrictions
Throughput & Connection Benchmarks
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Maximum cleartext stateful firewall throughput: 300 Mbps
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Maximum concurrent TCP/UDP connection table entries: 130,000
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Maximum new connections per second: 9,000
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IPsec VPN throughput (DES only on K8): Up to 80 Mbps; 3DES/AES disabled without upgrade license
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IPS throughput with AIP-SSM-20 module: Up to 150 Mbps
K8 License Hard Limits
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Encryption suite: Only DES 56-bit encryption enabled (3DES/AES-128/192/256 locked)
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Simultaneous IPsec IKEv1/IKEv2 tunnels (site-to-site + remote access): Max 50 peers (150 on K9 Security Plus)
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Logical routed VLAN interfaces: Up to 50 (100 on K9)
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TLS proxy sessions for encrypted VoIP inspection: Hard capped at 1000 sessions (K9 unlimited to chassis maximum)Cisco
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High Availability: Only stateless Active/Standby failover supported; no multi-context Active/Active load balancing
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Security contexts: Zero virtual firewall contexts (K9 unlocks up to 5 multi-context instances)
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Internal LAN host capacity: Unlimited, no user count throttling
Full Integrated Security & Networking Feature Suite (ASA OS 8.x / 9.x)
1. Stateful Adaptive Security Algorithm Firewall
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Full stateful packet inspection tracking all TCP/UDP connection states to block stateless filter bypass attacks
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Object-based inbound/outbound ACLs for granular traffic permission/denial rules
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Multi-vector DoS/DDoS mitigation: SYN flood protection, port scan detection, malformed packet filtering
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Layer 7 fixup protocol inspection for FTP, H.323, SIP, SCCP Skinny, RTSP, NetBIOS to preserve NAT traversal for VoIP and multimedia
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Transparent Layer 2 firewall mode native support
2. Standards-Based IPsec & SSL VPN Suite
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Site-to-site LAN-to-LAN IPsec tunnels for inter-branch private connectivity over public internet
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Remote access IPsec VPN for legacy Cisco VPN Client
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Clientless SSL VPN + AnyConnect Secure Mobility Client TLS remote access for teleworkers
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IKEv1/IKEv2 key exchange; K8 limited to DES encryption only
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X.509 digital certificate enrollment via SCEP for scalable multi-site deployments
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GRE tunnel encapsulation for routed non-IPsec traffic across VPN links
3. Broadband NAT & Routing Services
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Static one-to-one NAT, dynamic NAT pools, PAT port address translation for single public IP multi-device sharing
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Native PPPoE client for DSL broadband ISP authentication and dynamic public IP assignment
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Local DHCP server supporting up to 1024 internal IP address leases for LAN endpoints
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Static routing and policy-based routing (PBR); dual-stack native IPv4 / IPv6 support on ASA OS 9.x
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Local DNS caching to reduce external DNS query latency
4. Threat Defense & Unified Security Stack
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Base built-in IDS engine; enhanced inline IPS with optional AIP-SSM hardware module with hundreds of exploit signatures
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Automatic dynamic host blocking to quarantine malicious source IP addresses after detected security breaches
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Unicast Reverse Path Forwarding (URPF) strict/loose anti-spoof filtering to block forged source IP traffic
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Third-party URL web content filtering integration (expandable via CSC-SSM module)
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Local event logging + remote Syslog export to external SIEM platforms for compliance audit trails
5. AAA Access Control & Audit Logging
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Complete AAA authentication, authorization and accounting via external RADIUS and TACACS+ servers
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Local user credential database for standalone device administrative login
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Encrypted administrative access only: SSHv2 remote CLI, HTTPS ASDM web GUI
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SNMPv3 monitoring for device health, traffic utilization and fault alert reporting
6. Application-Aware Hierarchical QoS & Bandwidth Management
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Deep application recognition to classify Microsoft Teams, Zoom, enterprise SaaS, streaming media and P2P file-sharing traffic
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Four-level priority queuing to prioritize real-time voice/video conferencing over recreational internet traffic
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Per-link bandwidth shaping on all WAN/LAN/DMZ interfaces to eliminate link congestion
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DSCP marking preservation across IPsec VPN tunnels for consistent enterprise end-to-end QoS policy enforcement
Management & Configuration Tools
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ASA CLI Console: Traditional Cisco IOS-style command-line interface via serial console or encrypted SSH remote access
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Adaptive Security Device Manager (ASDM): Embedded HTTPS graphical web GUI for single-device visual configuration, real-time traffic dashboards and security event reporting
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Cisco Security Manager (CSM): Centralized enterprise policy management platform for bulk multi-ASA deployment orchestration, mass firmware upgrades and cross-device audit reporting
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TFTP + USB flash dual methods for OS firmware and full configuration backup/restore
Key Differentiators vs Related ASA Platforms
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vs ASA5510-SEC-BUN-K9 (Security Plus K9):
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K8 restricted to DES encryption; K9 unlocks full 3DES/AES strong crypto
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K8 capped at 50 IPsec tunnels / 50 VLANs / 1000 TLS proxy sessions; K9 supports 150 VPN peers, 100 VLANs and unlimited TLS proxy
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K8 lacks multi-context virtual firewall and Active/Active failover capability
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vs ASA5505-K8/K9: 1U rack-mount chassis with five dedicated FE ports (no PoE switch), higher 300 Mbps throughput and 130,000 concurrent sessions, SSM expansion slot for IPS/content modules
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vs ASA5520: Lower throughput, smaller connection table, single internal power supply, no Gigabit Ethernet ports native support
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vs Discontinued PIX-525: Modern ASA OS architecture, native IPv6, ASDM graphical GUI, AnyConnect SSL VPN, modular SSM IPS expansion capability
Typical Historical Deployment Scenarios
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Medium multi-segment branch office internet edge firewall with dedicated DMZ zones for web, email and application servers
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Regional corporate IPsec VPN hub aggregating dozens of remote retail and satellite office tunnels
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Small MSP multi-tenant colocation boundary security gateway with isolated customer VLAN segments
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Stateless Active/Standby redundant firewall pair for business continuity disaster recovery
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Legacy network lab training platform for ASA OS stateful firewall, IPS and multi-VLAN VPN architecture learning
3. E-commerce Short Marketing Description
Cisco ASA5510-K8 Mid-Tier 1U Rack-Mount Adaptive Security Appliance, legacy ASA 5500 series base DES license firewall with five 10/100 Fast Ethernet multi-purpose ports and one SSM expansion slot for AIP/CSC security modules, running ASA OS 8.x / 9.x. Delivers unlimited internal host capacity, stateful SPI firewall, IPsec site-to-site/remote access SSL VPN, basic inline IDS, NAT/PAT, PPPoE broadband and VoIP fixup inspection. Up to 300 Mbps cleartext throughput, 130,000 concurrent TCP/UDP sessions and 50 simultaneous DES-only IPsec VPN tunnels, stateless Active/Standby failover, managed via serial CLI, embedded ASDM web GUI and Cisco Security Manager. Obsolete end-of-support rack-mount firewall for medium branch and multi-segment DMZ deployments, upgradeable to Security Plus K9 license for strong crypto and expanded feature scale.
4. Product Catalog Keyword Tags
Cisco, ASA5510-K8, ASA 5500 Series Mid-Tier Rack-Mount Adaptive Security Appliance, Legacy Stateful Inspection Firewall, 1U 19-inch Rack-Mount Chassis, 5 × 10/100 Fast Ethernet Auto-MDI/MDIX Ports, Single SSM Expansion Slot (AIP-SSM / CSC-SSM Modules), Dual USB 2.0 Storage Ports, RJ45 Serial Out-of-Band Console Port, 1.6 GHz Intel Celeron Processor, 256 MB SDRAM, 64 MB Flash Memory, Cisco Adaptive Security Algorithm ASA, ASA OS 8.x / 9.x Firmware, Stateful Packet Inspection SPI, IPsec IKEv1/IKEv2 Site-to-Site & AnyConnect SSL Remote Access VPN, DES-Only Encryption (3DES/AES License Upgrade Required), Optional AIP-SSM Inline IPS Intrusion Prevention, CSC-SSM Web Content Filtering/Anti-Spam, NAT PAT Static Dynamic Address Translation, PPPoE DSL Broadband Client, VoIP H.323 SIP SCCP Fixup Protocol Inspection, Transparent Layer 2 Firewall Mode, Stateless Active/Standby Failover Redundancy, 50 Logical Routed VLAN Maximum (K8 Base License), 50 Max Simultaneous IPsec VPN Peers, 1000 TLS Proxy Session Hard Limit, 300 Mbps Max Cleartext Firewall Throughput, 130,000 Concurrent TCP/UDP Connections, ASDM Adaptive Security Device Manager Embedded Web GUI, Cisco Security Manager CSPM Centralized Policy Orchestration, Syslog SNMPv3 Monitoring, Dual-Stack IPv4/IPv6 Native Support, Application-Aware Hierarchical QoS Scheduling, End-of-Sale 2018 End-of-Support 2023 Obsolete Hardware, Upgradeable to Security Plus K9 Bundle, Medium Enterprise Multi-Segment DMZ Branch Internet Edge Firewall, Regional IPsec VPN Aggregation Hub
Naming Rule Explanation
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ASA: Adaptive Security Appliance, Cisco unified post-PIX firewall product family integrating firewall, VPN and IPS services
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5510: Mid-tier rack-mount model number within the legacy ASA 5500 branch security appliance lineup
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K8: Base export license identifier restricted to DES weak encryption, capped VPN/VLAN/TLS proxy limits and no multi-context support; contrasted with K9 Security Plus bundles unlocking full 3DES/AES strong crypto and expanded feature scale
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Hardware Distinction Note: All ASA5510 chassis share identical physical ports and hardware performance; only software feature scale, encryption algorithms and resource limits differ between K8 base and K9 Security Plus license bundles. The platform is fully obsolete with no official Cisco firmware updates, vulnerability patches or technical support available today.
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