Ubuntu Linux: Install RT2870 Chipset Based USB Wireless Adapter

Posted on in Categories Ubuntu Linux last updated October 19, 2010

This blog post listed Linux Compatible USB wireless adapters. It seems that many new Linux users frequently have problems learning how to install RT2870 driver under Linux. I also received email requesting installation instructions for the same device. This quick tutorial will explains how to install RT2870 based chipset device with WPA2 authentication and TKIP wireless encryption.

Send ICMP Nasty Garbage Packets to Network Hosts With sing Utility

Posted on in Categories Howto, Linux, Networking, Security, Tips, UNIX last updated January 29, 2008

Generally, I prefer to use nmap command for ICMP network scanning to probe all my network devices. By finding out unprotected devices you can improve network security and troubleshoot network problems. Recently, I discovered a cool utility called sing. It allows you to sends ICMP packets fully customized from command line. It allows you to do ICMP network scanning. Now you must be wondering, why perform ICMP network scanning? You can troubleshoot many network related problems without leaving your desk. For example,

  1. Find out using record route IP option to see the route that takes to vpn.nixcraft.in
  2. Find out remote server / network device operating system
  3. Diagnosing data-dependent problems in a network
  4. Test firewall security for invalid and garbage ICMP packets
  5. ICMP message types that generate responses from target routers / firewalls / IDS and other hosts
  6. Try to spoof router address and see how overall network reacts and many other things

This tool is not for a new UNIX / Linux user. It requires some sort of understanding for Internet hosts – communication layers and ICMP router discovery messages etc.
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Simple Linux and UNIX Shell Script Based System Monitoring With ping Command

Posted on in Categories Monitoring, Networking, Shell scripting last updated October 24, 2015

You can simply monitor your remote system hosted in some remote IDC. There may be many reasons for which system may out of the network. This simple script is useful to monitor your own small network at home or work.
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