1/28/2010

Who am I?

Internet technologist, doing IP since 1988.  

“Garage Entrepreneur”

#4 at Milkyway Networks (1994)

IETF standard security:IPsec/VPN

RFC4025

RFC4322

(1998)

Xelerance Corp 2003

FreeS/WAN (2001)

 

 

Agenda.

  • ●What is remote access? 

  • ●Telnet 

  • ●X-Windows 

  • ●Ssh 

  • ●RDP and VNC 

  • ●Summary 

This talk at http://www.sandelman.ca/SSW/talks/remoteaccess2011

 

What is remote access?

  • ●use a computer that is not in front of you. 

  • ●Some systems think of a “login” as really being a drive share (Novell). This is not remote access. 

  • ●Why do you want to do this? 

 

Terminals (and modems)

 

Shells and TTYs

 

 

RS-232

 

Telnet

 

 

 

 

 

 

 

 
 

Firewalls

  • ●Firewalls (and more so, NAT as pseudo-security) prevent telnet and remote access. 

  • ●If you have a DSL/cable “router” then you have this, and you need one of: 

    • –IPv6 

    • –Port forward rules 

    • –a VPN 

 

X-Windows

 

 

 

 

 

Xserver: xorg

 

Secure Shell

 

 

 

 

 

 

 

 

Secure Shell and port forwarding

 

 

 

 

 

 

 

Secure Shell and X-windows forwarding

 

 

 

 

Xserver: xorg

 

 

Secure Shell and agent forwarding

  • ●An example. 

 

 

 

ssh-add

 

 

magic

 

 
 

Remote Desktop Protocol (RDP)
Part 1: how things normally work

 

 

 

 
 

Remote Desktop Protocol (RDP)
Part 2: with RDP

 

 

 

 

Virtual Network Computing (VNC)
Part 1: windows or vino

 

 

 

 

VNC

server

 

Virtual Network Computing (VNC)
Part 2: Xvnc

 

 

SPICE, NX, TurboVNC, ...

  • ●SPICE is a protocol invented by Redhat/Qumranet. 

  • ●NX is a reduced bandwidth X-windows 

  • ●TurboVNC is a Sun project to bring OpenGL capabilities into the VNC fold.  

    • –Xvnc server has no hardware underneath it normally! 

  • ●There are others, including Citrix, SIMtone/XDS, and many extensions to RDP. 

 

Virtualized Desktops

  • ●Step 1: Pick one of the previous solutions. 

  • ●Step 2: Run server machine in a virtual machine. 

  • ●Step 3: Profit! 

 

Conclusions

  • ●You can do a lot with SSH.  

  • ●VNC works much better than RDP over WANs 

  • ●No “standard” yet. 

  • ● 

This talk at http://www.sandelman.ca/SSW/talks/remoteaccess2011