Archive for March, 2009

Reflexive access-list are one of the method that help us achive firewall functionality with a router hardware. The other methods that serve to the same purpose are Context-Based Access Control (CBAC) and TCP Intercept. For an introduction to CBAC with example please check my older post Cisco: Use CBAC...

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The IETF Thursday threw a birthday party for one of its most successful standards: Multi-Protocol Label Switching. The Internet’s leading standards body hosted a panel discussion outlining the reasons why the 12-year-old protocol has been so widely deployed and such a big moneymaker for carriers. “MPLS...

This announcement is from The Cisco Learning Network: Effective July 16th, 2009, important content changes will be implemented in the CCIE Voice Lab Exam. Candidates for lab exams scheduled July 16th, 2009 or later should prepare using the v3.0 Lab Equipment and Software Versions. Candidates scheduled...

The IETF is forming a new working group to address scalability issues in the Internet’s routing system caused by companies splitting their network traffic over multiple carriers, a practice called multihoming. The new working group will build upon a base proposal from a team of Cisco engineers...

Cisco has released eight security updates for the Internetwork Operating System (IOS) software used to power its routers. The patches were released Wednesday, the day Cisco had previously scheduled for its twice-yearly IOS updates. None of the bugs had been publicly disclosed ahead of Wednesday’s...

This post has nothing with tech section…or maybe everything! Cuddling up with your loved ones and admiring the stars in the night sky or organising a treasure hunt in the dark? At 8:30pm on Saturday 28 March, people from all corners of the world will turn off their lights for one hour – Earth...

In this article I want to show you how to extend your posibilities to test a network in GNS3. Sure, it’s simple sometime to use a Loobpack interface on one of your edge routers to simulate an external network, but sometime is useful to have something connected to the router port. Take as an example...