Before showing you how to configure a basic IP phone on Cisco CallManager Express (CCME), you need first to understand the concepts of ephone and ephone-dn. In CCME, “ephone” (short for Ethernet Phone) refers to the physical IP phone device, and is configured with the Ethernet MAC address of the IP phone. The MAC address […]
Archives for March 2009
Connections and Translations on Cisco ASA Firewalls
In order to be able to monitor and troubleshoot your Cisco ASA firewall, you need to understand the difference between connections and translations. Refer to the diagram above for an explanation about Connections and Translations. A Connection works at the Transport Layer and includes the Source IP/Source Port and the Destination IP/Destination Port. Connections are […]
Cisco ASA Multiple Context Mode – Configuring Virtual Firewalls on Same Chassis
A single Cisco ASA appliance can be partitioned into multiple virtual firewalls known also as “Security Contexts”. Each security context acts as a separate firewall with its own security policy, interfaces and configuration. However, some features are not available for virtual firewalls, such as IPSEC and SSL VPN, Dynamic Routing Protocols, Multicast and Threat Detection. […]
Cisco ASA Firewall Fundamentals ebook : Rapidshare and Torrent Free Download
The “Cisco ASA Firewall Fundamentals” ebook, that I have authored and been selling on this website, took me many hours of hard work to write. In addition to the work effort of writing this ebook, it encompasses also enormous value from many years of experience in administering and implementing Cisco ASA firewalls. Why am I […]
CCNA 640-802 Tutorial: seven-layer OSI Model
The first computer networks contained only computers from the same manufacturer because of incompatibilities between the vendors. For example, enterprise networks ran either a DECnet solution or an IBM solution, but not both. The International Organization for Standardization (ISO) decided to overcome this problem by creating a unified reference framework model, the Open Systems Interconnection […]