VNC - RDP

Remote Graphic Terminal Solutions

• Access to desktop applications
• Thin client compatible
  • Horse power is somewhere else
  • Log in remotely to a graphic user interface
  • This is not Telnet or SSH, they are command-based
• Microsoft offers Remote Desktop Protocol (RDP)
• Many Linux distributions package VNC
• Commercial third-party offerings exist
• *Consider bandwith requirements over CLI tools

Remote Desktop Services (RDS)

• Formerly known as Terminal Services
• Actual service is termdd.sys
• Listening on TCP 3389
  • There have been bugs historically in Remote Desktop leading To RCE (Remote Code Execution)
  • We never want to have RDP services exposed to the internet
  • Put up a firewall and require someone to use a VPN to RDP
• RDP Clients encapsulate KVM (Keyboard Video Mouse) over IP
• RDS passes KVM data to device drivers

Virtual Network Computing (VNC)

• VNC Client

• VNC Protocol

• VNC Server

• Leverages Remote Frame Buffer Protocol (RFBP)

  • Recording what's happening on our screen and its encapsulating it on over IP

• RFBP is extensible

• Capabilities are negotiated

• TCP 5900+N client interface

  • Ports that you want to allow vary a little bit

• TCP 500 typically a browser interface

  • Is not as sharp or as snappy, but there is broader compatibility