Other Recent Posts

HSRP : the definitive guide


Hot Standby Routing Protocol (HSRP) is a Cisco proprietary default gateway redundancy protocol. If the primary gateway fails, HSRP automatically redirects hosts to the the backup gateway. HSRP has been covered in few RouterFreak’s articles such as: Comparing HSRP vs VRRP How to configure HSRP on a Cisco router First Hop Redundancy …

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GNS3 network simulator for CCNA

gns3 ccna

GNS3 network simulator has become part of the daily work for many network engineers around the world. It became so popular that it even surpassed other network virtualization training solutions. It all started with Dynamips  written by Christophe Fillot in 2005. The software was used for emulation of some of …

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Cisco ASA as DHCP Server with Multiple Internal LANs

cisco asa multiple lans

This article describes the configuration of an interesting network scenario that is applicable in many real world situations, mainly in small to medium networks. We have three different internal LAN networks which host user computers and other IT infrastructure (servers, network printers etc). We want to separate the three internal …

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