Network technologies and trends:

Cisco


February 11, 2016  8:14 PM

Cisco ASA Firewalls can be exploited by sending crafted UDP packets

Yasir Irfan Yasir Irfan Profile: Yasir Irfan
Cisco, Cisco ASA, firewall, IPsec, IPsec VPN, LAN, UDP, vulnerabilities

Yesterday I received an email from Cisco Security Advisories about the critical vulnerability related IKE version 1 and IKE version 2 code of ASA Software which could empower an unauthenticated remote attacker to reload or even execute a code remotely on a affected ASA firewall.

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February 5, 2016  10:51 AM

Cisco intents to acquire Jasper Technologies

Yasir Irfan Yasir Irfan Profile: Yasir Irfan
Cisco, cloud, Internet of Things, iot, SaaS, Software as a Service

The era of technology is evolving and trends are moving towards a connected world, be it humans , machines, automobiles or household appliances, people are making efforts to connect them. So did the word "Internet of Things" (IoT) emerged. I could see Cisco is quite serious on this direction and...


February 1, 2016  6:37 AM

Oracle to stop Java browser plug-in

Yasir Irfan Yasir Irfan Profile: Yasir Irfan
ACS, ASDM, Cisco, Java, Network security appliances, Oracle

Oracle recently announced their decision to stop its Java browser plug-in, well this is a great move from Oracle.  Their next Java Development Kit "JDK 9" will be shipped without a browser plug-in. These days most of the browsers stopped supporting Oracle Java plug-in for oblivious reasons like...


January 27, 2016  6:00 AM

How to configure OSPF Totally Stubby Area in Cisco Routers- Series 2?

Yasir Irfan Yasir Irfan Profile: Yasir Irfan
Cisco, Cisco IOS, Cisco Routers, IP Routing, Loopback, OSPF, OSPF protocol, Routing, Routing Table

In my previous post we studied the topology and saw how Type 3, Type 4 and Type  LSA routes are installed in non 0 Area. Now lets configure Area 5...


January 26, 2016  5:16 AM

How to configure OSPF Totally Stubby Area in Cisco Routers- Series 1?

Yasir Irfan Yasir Irfan Profile: Yasir Irfan
areas of use, Cisco, Cisco Routers, Loopback, OSPF, OSPF protocol

In this series of posts lets configure OSPF Totally Stubby Area, but before proceeding further lets summarise the below topology

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January 24, 2016  5:33 AM

How to configure Stub Area in OSPF – Series 2?

Yasir Irfan Yasir Irfan Profile: Yasir Irfan
Cisco, Cisco IOS, Dynamic Routing, IP routing protocols, Loopback, OSPF, OSPF protocol, Routing

In my previous post we studied the topology and saw how Type 5 LSA routes are installed in non 0 Area. Now lets configure Area 5 as a stub area. Its very easy to...


January 4, 2016  5:04 AM

How to restore Cisco ASA Firewall to factory default?

Yasir Irfan Yasir Irfan Profile: Yasir Irfan
ASDM, Cisco, Cisco Firewall, Console port, DHCP, IOS commands

  Restoring the Cisco ASA Firewall to default settings is quite easier , there are two ways to do this. In this post lets see how we can do this using the Cisco IOS Command

config factory-default
Step 1 Connect the console...


December 28, 2015  4:12 AM

How to configure Site-to-Site IPSec VPN on Cisco Routers? – Series 2

Yasir Irfan Yasir Irfan Profile: Yasir Irfan
ACL, Cisco, CRYPTO, IPsec, VPN

In my previous post we talked briefly about IPSec. We will be using the below topology for our set up.

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December 27, 2015  5:26 PM

How to configure Site-to-Site IPSec VPN on Cisco Routers? – Series 1

Yasir Irfan Yasir Irfan Profile: Yasir Irfan
ACL, Cisco, Cisco Routers, IPsec, IPsec VPN, Topology, VPN

IPSec is the protocol one can use to establish a Site-to-Site VPN , as it is widely used because its an open standard protocol which offers secure and encrypted communication over the public internet domain. IPSec works at Network later and only pass unicast traffic. I will brief you all about how...


December 20, 2015  4:49 AM

How to capture packets in Cisco VIRL?

Yasir Irfan Yasir Irfan Profile: Yasir Irfan
Cisco, Packet capture, Packet Sniffing, router, SSH, Telnet, Wireshark

With the introduction of Cisco VIRL 1.0.0,capturing the  traffic has become quite simpler. One can now directly click the link on a device and do a packet capture. , in this post lets see how we can capture the traffic in Cisco VIRL and analyse it. Step 1: Login in to VRIL server form your web...


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