Secure connectivity:  Secure Sockets Layer (SSL) VPN for secure remote access  Hardware-accelerated DES, 3DES, AES 128, AES 192, and AES 256  Public-Key-Infrastructure (PKI) support  50 IPsec tunnels  Cisco Easy VPN client and server  NAT transparency  Dynamic Multipoint VPN (DMVPN)  Tunnel-less Group Encrypted Transport VPN (GET VPN)  VRF-aware IPsec  IPsec over IPv6  Adaptive control technology  Session Initiation Protocol (SIP) application-layer gateway  Cisco IOS Firewall:   Zone-based policy firewall   VRF-aware stateful inspection routing firewall   Stateful inspection transparent firewall  Advanced application inspection and control  HTTPS, FTP, and Telnet Authentication Proxy  Dynamic and static port security  Firewall stateful failover  VRF-aware firewall  Cisco IOS Software black and white lists  Integrated threat control:   Intrusion Prevention System (IPS)  Control plane policing  Flexible packet matching  Network foundation protection |