Random Dialing Or War Dialing:
Random dialing or war dialing means dialing of phone numbers randomly, just to see that which one of them is a modem connected to the computer and is available to bypass the firewall and other security technologies.
Prevention:
- Ensure that all the modems are secured and authenticated with strong encryption technology.
- Modems should be protected by centralizing them at single physical location in order to prevent other network segments from being attacked.
- Set the modem to the dial-back mode to prevent unauthorized third party.
