Very easy to use - Portable - Free -128KB (Both Client & Operator)
http://www.ammyy.com...n_overview.html
http://www.ammyy.com/AMMYY_Admin.exe
Ammyy Admin - is the system of remote computer access. It's reliable and accessible way of providing remote computer assistance and remote teaching for your clients or employees in any place of the world. Ammyy Admin connects remote computers within some seconds without any installation or configuration. You can view a computers of your clients, manage their keyboard and mouse.
Features
Access Computers from Anywhere
Administrators and employee users can access host computers from any computer
No software installation on your servers are required
No additional infrastructure or IT resources are required
View only option
Configure permissions on a per computer ID (based on hardware)
Use with existing remote control programs: VNC, Terminal Server and so on
Firewall Friendly
No need real ip-address (neither for Client nor for Operator)
No configuration of IP addresses
No need to change or open ports
No need setup Firewall or VPN, so you'll avoid new "holes" in your system
Work with all existing firewall and internet infrastructure
No extra hardware of software to deploy
Access computers behind gateways NAT without port mapping
Absolute Free of Charge
No installation required
Transfer Files between Local and Remote Computers
Maximum Security
Protected against man in the middle attacks
All communications between the local and remote computers are encrypted by AES using a different key for each session
No open ports on the local or remote side
No plain text data packets passing over the network
Nothing available for an attacker to exploit
Remote Administration of Unattended Servers
Can work as system service
Allow remote reboot, log on, log off, switch user, reconnect and so on