Configuration of a drop-in bridged CISCO Router / Firewall

Configuration of a drop-in bridged CISCO Router / Firewall: "Configuration of a drop-in bridged CISCO Router"

Often, you have a given network layout which cannot be changed. For example, you own only a few routable IP-Addresses and therefore must use the same Network-ID for the DMZ (Demilitarized Zone) and your Internet connection. Some modern Firewalls / Routers allows to "drop-in" in such a network configuration. That means, no network changes have to be made and only one IP-Address is used for the router / firewall. If you use a Cisco Router, this can be difficult, because usually each interface on a Cisco Router must have one IP-Address assigned to it. But there is a trick - so called bridging - using this feature you can overcome these difficulties.