Other Recent Posts

What To do about SNMP-3-AUTHFAIL Messages

SNMP-3-AUTHFAIL - community string or ACL - which comes first

Have you secured your router with an ACL for SNMP access but are still seeing pages of SNMP-3-AUTHFAIL messages in your logs? In this article we will be dig into this issue and find out exactly what's going and and why an SNMP-3-AUTHFAIL message might showing up in your logs ...

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Book review: Juniper SRX Series

Juniper SRX Series

I met Brad, co-author of "Juniper SRX Series", a few years ago when I was also working for Juniper Networks. I remember well how active he was in supporting the Juniper community on IDP first (the Intrusion Prevention solution) and SRX (the next-generation firewall family) later. So, when I saw ...

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Interview Questions for Network Engineers

man interviewing

Updated to January 2015! Are you thinking about getting a job as a Network Engineer?  Are you considering leaving your present position and getting a new job at a new company?  Has it been a while since you've interviewed?   If you've answered yes to any of these questions then ...

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Time–Based Access Control Lists


As you probably know, access control lists (ACLs in further text) are a means of providing firewall protection. Except the basic division on standard and extended ACLs, we distinguish between time-based, reflexive ACLs, turbo ACLs, and many other. The focus of this article are time-based ACLs, when should you use ...

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Understanding OSPF Areas

OSPF areas

Whether you are preparing for the Cisco IP Routing exam or you are an experienced network engineer planning to implement the Open Shortest Path First (OSPF) routing protocol, you should familiarize yourself with the capability to divide your network into separate OSPF areas. Using multiple OSPF areas reduces the frequency ...

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How to Become a Network Engineer

network engineer

So you want to become a network engineer?  I have a lot of people ask that exact question - "How can I get into Networking?"  or "How do I become a Network Engineer?".  I personally think that anyone who asks these questions and has a desire to learn about computer ...

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