Category Archives: Security – CCNA / CCNP Security

How to add ASA Firewall to GNS3

1. Download GNS3, I accept all the defaults (I actually tick to install SuperPuTTy, as tabbed console windows can be handy when using GNS3). Launch the program, you will be greeted with the following setup wizard. Select Option 1. Note: You can do the same in future, by going to Edit > Preferences 2. Check thatContinue reading “How to add ASA Firewall to GNS3”

Botnets

A botnet is a collection of Internet-connected programs communicating with other similar programs in order to perform tasks. This can be as mundane as keeping control of anInternet Relay Chat (IRC) channel, or it could be used to send spam email or participate in distributed denial-of-service attacks. The word botnet is a combination of the wordsrobot and network. A quick introduction toContinue reading “Botnets”

Proxy Servers / Anonymous Surfing (Hotspot Shield/Tor Browser – DarkNet/Deep Web)

In computer networks, a proxy server is a server (a computer system or an application) that acts as an intermediary for requests from clients seeking resources from other servers. A client connects to the proxy server, requesting some service, such as a file, connection, web page, or other resource available from a different server and the proxy server evaluates the request asContinue reading “Proxy Servers / Anonymous Surfing (Hotspot Shield/Tor Browser – DarkNet/Deep Web)”

BYOD security (ISE/Airwatch/Fixmo/LabTech) (MDM/MCM/NAC)

Bring your own device (BYOD) (also called bring your own technology (BYOT), bring your own phone (BYOP), and bring your own PC (BYOPC) refers to the policy of permitting employees to bring personally owned mobile devices (laptops, tablets, and smart phones) to their workplace, and to use those devices to access privileged company information and applications.[1] The term is also used to describeContinue reading “BYOD security (ISE/Airwatch/Fixmo/LabTech) (MDM/MCM/NAC)”

TCPDump Packet Sniffing on Linux Back track 5

tcpdump is a common packet analyzer that runs under the command line. It allows the user to intercept and display TCP/IP and other packets being transmitted or received over a network to which the computer is attached.  Tcpdump prints the contents of network packets. It can read packets from a network interface card or from a previously created saved packet file. Tcpdump canContinue reading “TCPDump Packet Sniffing on Linux Back track 5”