Themenabend/Firewall Piercing

Contents:

• short Intro to Firewalls
  • Packetfilter
    • stateless
    • stateful
    • NAT (IP header recalculation, CRC checks ...)
  • Application Layer Gateway

• Basics
• nc / cryptcat
• the art of hiding (backpacking your data)
  • Tunnel
    • ip tunnel
    • ssh tunnel

• Simple Examples of tunnel

• • HTTPS-Tunnel (connect)
  • Http-Tunnel (GET / POST)
  • Web-Shell

• Advanced Examples
  • HTTP header
  • ICMP-Tunnel
  • DNS-Tunnel
  • hiding stuff in ip headers
  • E-Mail tunnel

more to come ...