Cisco ASA5520-AIP20-K9 | ASA 5520 Security Appliance

1. Firewall protection: Stateful inspection throughput of up to 450 Mbps
2. VPN support: Up to 750 IPsec VPN peers, up to 250 SSL VPN peers
3. Intrusion Prevention System (IPS): Up to 2 Gbps throughput
4. Network protocols: TCP/IP, IPv4, IPv6, DHCP, ICMP, ARP, HTTP, FTP, SMTP, DNS, POP3, IMAP, Telnet, SSH, SSL, SNMP
5. Authentication methods: RADIUS, TACACS+, LDAP, Active Directory, Kerberos
6. Management interfaces: CLI, ASDM, SNMP, SSH, Telnet
7. High availability support: Active/standby failover, stateful failover, dual ISP support
8. Power supply: Dual AC or DC power supplies
9. Rack-mountable: Yes, 1U rack height
10. Memory: 2 GB RAM, 256 MB flash memory
11. Interfaces: 4 Gigabit Ethernet interfaces, 1 Fast Ethernet interface, 1 management interface
12. Operating temperature: 32 to 104°F (0 to 40°C)

Helpful notes:
1. The ASA 5520 supports up to 10 virtual contexts, allowing multiple firewalls to be run on a single physical appliance.
2. The appliance can be configured to block traffic based on country of origin using the GeoIP feature.
3. The IPS feature includes over 1,000 pre-defined signatures for commonly known attacks, as well as the ability to create custom signatures.