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Archive for the ‘CISCO’ Category

NetFlow Primer

April 8th, 2010 No comments

Because it is part of Cisco IOS software, NetFlow enables networks to perform IP traffic flow analysis without deploying external probes, making traffic analysis economical even on large IP networks. Read more…

Cisco “leans on” Jeremy Cioara! (What are they thinking?)

April 5th, 2010 No comments

Jeremy Cioara has,  for many years, encouraged countless hundreds of thousands of would-be Cisco engineers through his skillful training and fabulous Cisco expertise.

In his spare time, he runs a blog “ciscoblog.com” which gets in excess of 600,000 unique visitors per month.  Jeremy’s blog is mainly devoted to Cisco and provides valuable and harmless (quite the opposite) marketing for Cisco.

This is how Cisco thanks him:

Read more…

Categories: CISCO, Diary of Events Tags:

ACL for Internet Facing Router

April 5th, 2010 No comments

A base Access List for any internet facing router, re-produced from Mike Storm and Jeremy Cioara’s blogs:

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Categories: Network Design, Security Tags: ,

Quick Practice Lab: Configure CBAC

April 5th, 2010 No comments

This quick lab demonstrates how CBAC is configured and applied to interfaces.

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Categories: CISCO, Security Tags:

Quick Practice Lab: Configure IPsec Tunnel between two Cisco routers

April 5th, 2010 No comments

Try this quick and simple practice lab, where a secure IPsec tunnel is configured between two routers.  Use debug to see ISAKMP and IPsec working.

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Categories: CISCO, Security Tags:

MPLS FAQ – For Beginners

April 3rd, 2010 No comments

Here is a basic overview of MPLS describing:

  • What is Multi?Protocol Label Switching (MPLS)?
  • What is a label? What is the structure of the label?
  • Where will the label be imposed in a packet?
  • What is a Forwarding Equivalence Class (FEC)?
  • What is an upstream label switch router (LSR)?
  • What is a downstream LSR?
  • What do the terms incoming, outgoing, local, and remote mean when referring to labels?
  • Can an LSR transmit/receive a native packet (non?MPLS) on a MPLS interface?
  • Can an LSR receive/transmit a labeled packet on a non MPLS interface?
  • What platforms and Cisco IOSs® support MPLS?
  • Generic Routing Encapsulation (GRE) tunnel has a overhead of 24 bytes.  How much overhead does an MPLS LSP tunnel have?
  • How does the LSR know which is the top label, bottom label, and a middle label?
  • What is the range of label values? What label values are reserved andWhat do the reserved values signify? Read more…
Categories: Network Design Tags:

Cisco IOS version 15.0

April 1st, 2010 No comments

Cisco has announced a major change in the IOS versions, from the latest version 12.4 up to version 15.0

This is a major change and introduces some key changes, particularly to the way in which additional features are now “activated” using a licence key. Read more…

Categories: CISCO Tags:

Ipv6 using “6to4 Tunnelling”

March 31st, 2010 No comments

This article discusses configuration of the 6to4 tunnel on an IOS-based access router, however this concept applies to any router or end host which supports 6to4 tunneling and has a global IPv4 address. Read more…

Categories: Network Design Tags:

Basic Cisco ASA Configuration

March 30th, 2010 No comments

This is the base setup of a Cisco Adaptive Security Appliance:

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Categories: CISCO, Security Tags:

Enabling ASDM on PIX and ASA

March 30th, 2010 No comments

ASA_firewall_policy_lgCisco Adaptive Security Device Manager provides setup wizards that help you configure and manage Cisco firewall devices, including:

  • the Cisco ASA Adaptive Security Appliances,
  • Cisco PIX appliances,
  • Cisco Catalyst 6500 Series Firewall Services Modules

All without “cumbersome” command-line scripts

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Categories: CISCO, Security Tags: