How to set up an isolated Guest WLAN on TP-Link WDR4300 with OpenWRT using command line

You have guests at your home and they want to use your wireless network to retrieve emails, etc off the Internet. This is not a unique situation, but is quite common everywhere, with the proliferation of devices and services that require Internet access. The only issue you face is that if you give them your . . . → Read More: How to set up an isolated Guest WLAN on TP-Link WDR4300 with OpenWRT using command line

How to obtain WLAN traffic statistics using Gkrellm

How to obtain WLAN traffic statistics using Gkrellm

Gkrellm is a powerful system monitor utility on Linux systems. If you need to obtain CPU temperatures, disk I/O, network traffic incoming and outgoing statistics (daily, weekly or monthly), then this is the right choice.

To gather a sizeable amount of WLAN traffic count, you need to . . . → Read More: How to obtain WLAN traffic statistics using Gkrellm

How to watch the internet connections established by devices on OpenWRT router real-time with iftop

We all want to know to which internet connections our devices connect to. One of the best ways to do that, is use iftop.

Install the iftop package in OpenWRT on the router itself to enable it to be used to monitor these network connections.

To do so, open a terminal window on your computer . . . → Read More: How to watch the internet connections established by devices on OpenWRT router real-time with iftop

How to monitor battery, network, CPU in Windows

Linux has an application called gkrellm. It displays battery, network, CPU usage, system temperature, disk usage etc on the desktop. Gkrellm is configurable and can run on system startup too. Gkrellm comes with most distributions. There is a Windows version too, but it is outdated as of now.

A good substitute that exactly does what . . . → Read More: How to monitor battery, network, CPU in Windows

Xiaomi or Xperia type security issues and how to detect them on any Android device

Anything that is too good to be true and available at dirt-cheap prices like the Xiaomi phones sold in flash sales on http://www.flipkart.com, always has a catch. It is like the Trojan horse. The security issue with Xiaomi phones is that the phone allegedly transmits user sensitive data like IMEI, contacts, numbers etc to servers . . . → Read More: Xiaomi or Xperia type security issues and how to detect them on any Android device

Create VLAN on TP-Link WDR4300 wireless router with isolation

The TP-Link WDR4300 wireless router has an Atheros Chip. Due to this, it is not easy to set up VLANs (Virtual Local Area Networks) on it. Below explains how this can be done with the kind of problem that was overcome.

Problem: I had a guest computer on my home wireless network that kept sending . . . → Read More: Create VLAN on TP-Link WDR4300 wireless router with isolation

Broadcom 4313 wireless does not connect to network or internet in Linux but detects wireless networks

Wireless adapter on Lenovo Z580 does not connect to Internet in Linux although it detects all the wireless networks. Finally, got the settings right to enable the use of built-in Broadcom 4313 Network controller [0280]: Broadcom Corporation BCM4313 802.11bgn Wireless Network Adapter [14e4:4727] (rev 01)

Here are the steps. Open a terminal window. In the . . . → Read More: Broadcom 4313 wireless does not connect to network or internet in Linux but detects wireless networks

How to draw network diagrams in LibreOffice or OpenOffice

You can use Dia to draw network diagrams in linux or windows. However, if you just want to use LibreOffice Draw or Impress or even Open Office, you can use network images from Cisco.

You can them at http://www.cisco.com/web/about/ac50/ac47/2.html

You will also find Visio templates at http://www.cisco.com/en/US/products/hw/prod_cat_visios.html

You can see the diagrams created using the . . . → Read More: How to draw network diagrams in LibreOffice or OpenOffice

gvfsd-http leaves open connections in Ubuntu 12.04 LTS

You will notice on a Ubuntu system when you give the following command in a terminal window, $ sudo netstat -tpW <enter>

it shows many open connections which do not get closed. These will have the process gvfsd-http listed against them.

To close these connections, you can kill the gvfsd-http process and also remove rhythmbox . . . → Read More: gvfsd-http leaves open connections in Ubuntu 12.04 LTS

List of all services connected to internet in Linux

To determine all services connecting to the internet, enter the command below in a terminal window: $ sudo lsof -n -P -i +c 15 <enter>

You can also find similar information using the command below: $ sudo netstat -anp | grep e tcp e udp <enter>

. . . → Read More: List of all services connected to internet in Linux

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