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Tag: mac-address

  • ARPing – Ping using Address Resolution Protocol(ARP)

    ARPing is an utility that can be used to ping using ARP requests instead of using ICMP as used in standard Ping utility.

    Because it involves ARP, arping is limited to the local network to which the server or the interface (if more than one interface) is connected to. ARPing can be quite useful to

    • Check if an IP Address is already in use before assigning to another device
    • Duplicate address detection
    • Update neighbors ARP cache

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  • Configure Cisco Port Security on Switches and Router interface

    Cisco Port Security is a features that can help secure access to the physical network. Any Network admins nightmare is an unauthorised device or a PC connecting to the network. This could be as simple as an innocent guest plugging his PC into a floor port hoping to get an internet connection or a malicious intruder connecting to the network trying to gain access to confidential information.

    Consequences could as bad as

    • Virus, Spyware or malware infection from a PC unprotected PC
    • A malicious hacker or an intruder gaining access to the network
    • A malicous attacker launching a Denial of Service attack using MAC Address flooding

    Cisco IOS has the port-security feature which can be used to restrict the MAC-Address of the devices that connects to each of the physical switchports.

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  • getmac – Get the MAC address of a network adapter

    getmac may not be a known tool but is a very easy and effective way to obtain the MAC address of a Windows 2000, Windows 2003 and Windows XP computer. (more…)