Proprietary IPsec Solutions (2)

• Cisco Solution

  • Concentrator 3000/5000 Gateway, PIX Firewall, IOS VPN
  • VPN Client software

• Authorized protocols

  • IKE protocol: 500/udp
  • With NAT:
    • (IP Protocol) ESP : 50
  • Without NAT:
    • NAT-T (IETF Draft) – IPSec ESP encapsulated in UDP datagrams: 4500/udp
    • Cisco specific:
      • IPSec ESP encapsulated in UDP flow: 10000/udp
      • IPSec ESP encapsulated in TCP connection: 10000/tcp