Hello there, this is Harris Andrea. Today I have redirected my older blog Cisco-Tips.com to its new domain home which is the website you are viewing now (NetworksTraining.com). Please update your bookmarks accordingly. I have configured a permanent 301 domain redirect (using .htaccess file) for the whole cisco-tips.com website and I have moved the old […]
Cisco Aggregation Services Router 9000-ASR 9000
The ASR 9000 has 6 times more capacity and is 4 times faster than any other router in the same category. It is able to transmit data at a rate of 6.4 terabits per second. What does this mean? It means that it is capable of transmitting 200 dvd video / sec or 250.000 mp3s […]
Forwarding a DHCP Request using Cisco ip helper-address command
DHCP, as we all know, is a broadcast protocol (shame on you if you don’t know that already 🙂 !!) which normally works only on the same Layer 2 broadcast domain. Does this mean that you need to have your DHCP Server connected to the same network subnet as the DHCP clients? If this was […]
Cisco ACE Web Application Firewall Appliance
I was reading a security statistics report the other day and it seems that web vulnerabilities take up the majority of the pie. SQL injections, Cross Site Scripting, Code injections etc are found everywhere in web applications. Unfortunately secure coding (not only for HTML but for any software application) is not yet widely adopted, so […]
Cisco IOS jumps from version 12 to version 15
The latest Cisco IOS version was 12.4 until recently when Cisco IOS version 15.0 was introduced. Have you noticed the jump from version 12 to 15? Do you wonder why versions 13 and 14 were skipped? Well, rumors say that Cisco avoided those version numbers because 13 is considered unlucky in the Western Culture and […]
Cisco launches SA 500 Series Security Appliance
Cisco announced a new security appliance model, the SA500 series, which is focused for the small business market. Cisco tried to fill the gap of the UTM (Unified Threat Management) appliance market in which other competitors (such as Fortinet, Checkpoint etc) were already ahead. Following the philosophy of the UTM appliance, the SA500 offers an […]
BlackHat 2009 Router Exploitation Presentation
I was reading an interesting presentation the other day, taken from BlackHat USA 2009 Briefings from Felix Lindner, and thought about sharing the main points here. The guy presents a reasonable analysis of the current situation regarding Router security and exploitation. As we all know, routers are exploitable of course, but not as easy as […]
Cisco IOS Command Line Interface Keyboard Shortcuts
Learning to configure your Cisco devices from the Command Line Interface (CLI) is an essential step towards your Cisco networking career. This means that you need to learn how to configure the Cisco IOS operating system which runs on routers, switches and other network devices. Acquiring this hands-on experience with the Cisco IOS CLI will […]
Cisco ASA 5500 new software 8.2 released
A new software version 8.2 was released for the Cisco ASA 5500 appliance in mid-April 2009. All prior ASA releases (7.0, 7.2, 8.0, and 8.1) can be upgraded to version 8.2. If you have a Cisco SMARTnet services contract you can download version 8.2 free of charge. All ASA models (from 5505 up to 5580) […]
Top 10 technical certifications for 2009
A few days ago I stumbled upon a post on About.com which listed the top 10 technical certifications for 2009. The rankings were evaluated according to the website’s visitors feedback, to the profitability and relevancy to today’s market, and from the popularity of the certifications discussed on the site. First on the list is Cisco […]
Some Interesting Cisco Related Blogs and Websites
My everyday browsing activity for refreshing my Cisco technical knowledge includes visits to various blogs and websites that I have found over the years and that I believe are among the best Cisco resources you can find in the web in addition to the official cisco.com site. These sites are all maintained by industry experts […]
User Authentication for Web Server Access
Imagine the following scenario: We have a web server on a DMZ protected by a Cisco ASA 5500 firewall. We would like to allow external Internet users to access this web server only after they successfully authenticate with a username/password credential. Maybe this scenario could be applicable in situations where we need to allow employees […]
Cisco Branch Virtual Office Solutions
Extending the central office enterprise environment to remote branch office locations gives employees greater flexibility while enhancing productivity and reducing costs. Cisco Virtual Office solution is an umbrella of technologies and products that delivers secure data, voice, and video communication to remote teleworkers and branch offices, providing to remote employees a seamless office-caliber experience to […]