When would you need this: When you need to configure your router remotely through an insecure environment.
Special Requirements: IOS version over 12.1.3.T (with a "k9" in its feature set).
When would you need this: When you need to configure your router remotely through an insecure environment.
Special Requirements: IOS version over 12.1.3.T (with a "k9" in its feature set).
When would you need this: When you need to setup Telnet on a Cisco Router do facilitate remote configuration.
Special Requirements: None.
When would you need this: When you want to create a secure tunnel to transfer data between two sites without the use of VPN concentrator or other security devices.
Special Requirements: The routers used must support IPSec. Most of Cisco routers do. Another need is that both sides use a static public IP address to connect to the Internet.