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Networking


July 2, 2015  9:28 AM

CCIE rescheduling policy is changed

Yasir Irfan Yasir Irfan Profile: Yasir Irfan
CCIE, Cisco, Cisco certifications

Cisco changes their CCIE retake policy, the new email I received from Cisco Learning states “For a limited time, we will waive the current lab retake policy so that all lab candidates will be able to retest for their lab exam with...

May 30, 2015  8:05 AM

How to Configure uRPF in Strict Mode?

Yasir Irfan Yasir Irfan Profile: Yasir Irfan
Cisco IOS, Cisco security, IP address, router, Topology

In this post lets configure uRPF in Strict mode, I have created the below topology using Cisco VIRL, a great tool to test many things.

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May 28, 2015  6:55 PM

CCNA Cloud and CCNP Cloud is here – Series 2

Yasir Irfan Yasir Irfan Profile: Yasir Irfan
CCIE, CCNA, CCNP, Cisco certifications, Cloud infrastructure, Design, Internet of Things, Linux, Storage, UC, Virtualization, Windows

The next major addition of Cisco Certifications towards Cloud is CCNP Cloud. Like all Cisco Professional Certifications the prerequisite for

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May 28, 2015  5:02 AM

CCNA Cloud and CCNP Cloud Certifications are here – Series 1

Yasir Irfan Yasir Irfan Profile: Yasir Irfan
CCIE, CCNA, CCNP, Cisco certifications, Design, Linux, Storage, UC, Virtualization, Windows

Cisco announced the release of new Associate and Professional level of Certifications targeting Cloud. Seems like Cisco wants Networking professional to be aware of SDN, ACI, Virtual Application Containers and SAN. These certifications are known as CCNA Cloud and CCNP Cloud. In order to be a...


May 27, 2015  6:10 AM

What is uRPF – Strict Mode?

Yasir Irfan Yasir Irfan Profile: Yasir Irfan
Networking

As discussed in previous post, uRPF (Unicast Reverse Path) works in two modes strict mode and loose mode, in this post lets discuss more about Strict mode In Strict mode the router will perform following...


May 26, 2015  4:52 AM

What Is uRPF?

Yasir Irfan Yasir Irfan Profile: Yasir Irfan
IP, IP address, IP packets, RFC, Routers, Routing Table

uRPF also known as Unicast Reverse Path Forwarding is a great security feature found in Cisco IOS Router and ASA Firewalls which is used to limit the malicious traffic on an enterprise network. Generally when a router receive a unicast IP Packet, the routers cares only about the destination IP...


May 25, 2015  4:43 AM

What is Cisco IOS Software Checker?

Yasir Irfan Yasir Irfan Profile: Yasir Irfan
ASA, Cisco, Cisco Nexus, firewall, IOS, Nexus, Security, Switches

We are all leaving in the age, where Network Security is given upmost importance; almost every major Organization does have a good Security team who are even responsible for looking at the vulnerabilities reported in their Network Security products. Cisco does have a great tool called

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May 21, 2015  6:28 PM

Beware of Trojanized version of PuTTY

Yasir Irfan Yasir Irfan Profile: Yasir Irfan
Blog, Cisco, Filezilla, FTP, Networking, PuTTY, Website

It all started in late 2013 and early2014, a compromised FTP client dubbed “StealZilla,” based off the open source FileZilla FTP client was discovered. Now in 2015 new attack is discovered based on the same techniques and the actors as StealZilla” to alter the source code of the widely used...


May 20, 2015  8:33 AM

What is Cisco Switch Selector?

Yasir Irfan Yasir Irfan Profile: Yasir Irfan
Cisco, Collaboration, firewall

When it comes to selecting a Cisco Switch either a new Switch or need an upgrade an existing Cisco Switch one needs to consider many things be it the feature set, type of modules needed, wither it need be a stackable or modular switch.One has to go through many parameters, which may some times...


May 7, 2015  6:00 AM

Two resources one should consider to pass F5 101- Application Delivery Fundamentals exam

Yasir Irfan Yasir Irfan Profile: Yasir Irfan
F5, TCP/IP

When it comes to any certification exams ,the key thing anyone looks for is the resource. F5 101- Application Delivery Fundamentals exam is no different from any other certification exam. F5 team have ensured that, good resources and teams are available to help some one who is perusing his /her F5...


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