Find all active IPs your local network using nmap
BY Anoop John
6 years ago
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Nmap is a Free Software tool that can be used for a variety of network network exploration tasks and security auditing. Nmap ("Network Mapper") scans IP packets to determine a lot of different aspects about hosts available on the network and also about services these hosts are offering. It can help you find a lot of information about these hosts including reverse DNS names, operating system guesses, device types, and MAC addresses.

Here is a simple command to find all active IPs in your local area network using nmap

nmap -sP

You can install nmap in Ubuntu / Debian by running

sudo apt-get install nmap

Alternatively you can also use

 sudo arp-scan -I eth0



on 05th May 2007 / by webmaster
BSNL is one of the leading broadband providers in India. They have managed to provide blazing fast internet connections at rates affordable to an average middle class Indian. Although they provide top quality connection speeds with very little down time, their technical support leaves a lot to be desired. More so when it comes to configuring connections in Linux. They just mention Linux as "other operating systems" in their help guides. This article covers the configuration of the BSNL Dataone broadband connection over a Dare Global DB108 modem-router on Ubuntu. Although we have tested it only on Ubuntu the steps should more or less apply for other flavours of Linux as well. There are two ways of configuring a PPPOE connection - one is using the pppoeconf command and the other by configuring the router directly. The former requires you to log on an log off from your pc while the latter lets you have a full-time-up connection which lets you go online the moment you turn on your PC. We are covering only the second strategy in this tutorial. Connect the BSNL DB108 modem/router to the BSNL line and the power supply Connect the modem to the computer using an ethernet cable Power on the modem and the computer. Go to System/Administration/Network and ensure that the network card (most probably eth0) is the default connection and that it is active. In the properties dialog for eth0, change the IP address to static IP and set the IP to Set the DNS servers as,, and; Leave the other settings as default. Check if you have connectivity to the router by running 'ping' in a terminal. Open firefox and go to This will bring up the authentication dialog. Enter user-admin and password-password to log into the router administration system. Click on WAN in the left menu. In the WAN setup page identify the row with VPI/VCI value as 0/35 (probably the third row) and click on the Edit button. In the wizard that follows, select PPP over Ethernet (PPPoE) as the connection type and enter your BSNL broadband connection username(eg: anoopjohn) and password(eg: asdf123). Leave all other settings as is and save by clicking next. Reboot the router by clicking on reboot in the left menu. Test the connection by pinging some public IP address (eg: of the Also check your dns settings by pinging Verify this by trying to open in your browser. If all goes well you should be able to access internet on your system by this point. In step 6 if you dont have connectivity to the router then you have to check if your ethernet card is up by running 'ifconfig -a'. If the card is up then you should be able to ping If both card and cable are up then you should try resetting the router and see if it is working fine. Normally there shouldn't be any problem. In step 12 if there are problems accessing internet sites but are able to ping public ip addresses then check your DNS server settings in /etc/resolv.conf. This file should be of the format nameserver nameserver nameserver nameserver If you have any questions you can contact us by commenting to this article. Hardware Linux Networking Ubuntu Leave a reply Your email address will not be published. Required fields are marker * Abhi (not verified) access_time 23 May 2019 - 04:21 Hello, I am trying to connect to my D-link DI-614 wireless router to the my BSNL ADSL broadband modem DB108. My PC is currently connected to the modem via an ethernet link. Instead, I established a two-way connection in the following way: 1) Router - modem via ethernet cable. 2) PC - Router via an ethernet cable. However when I do this, my PC is not able to connect to the internet. I am wondering if anyone can help me out with this. Subhadeep (not verified) access_time 23 May 2019 - 04:21 Thankx for this i was in a real problem connecting to the net via broadband on BSNL. Thankx again man u r life saver... Add new comment

on 12th August 2007 / by webmaster
One of the strange types of complaints we receive from our customers is "The system was working fine till yesterday, I had shut down the system and it is not booting now". Strange as it may sound the common feature of these support requests included burnt motherboards, non-functional PCI Card slots and sometimes burnt Ethernet cards. One common factor in such cases was that these customers had Asianet Dataline as their internet service. Asianet's cable line is prone to power surges that could burn your modem, ethernet card and if you are unlucky motherboard, processor and even monitor. The possible reason for this is that they depend a lot on KSEB transmission posts to support their cable infrastructure and they do not have surge protection devices at the customer side of the cables. Whatever be the reason there is a risk of power surges damaging the computer connected through Asianet Dataline. Asianet themselves confirm this issue by specifically requesting users to not connect through the USB or on-board ethernet card and instead use a PCI ethernet card to connect. Following are some precautionary steps you should be taking to protect your PC if you are an Asianet Dataline subscriber Always connect to Asianet Dataline using a PCI Ethernet card. Spending an additional 200-300 bucks is worth it. DONOT connect to Asianet Dataline using the USB port DONOT connect to Asianet Dataline using the onboard ethernet card (built-in network card) Physically disconnect your Asianet Dataline cable from the modem when you are not using internet. Physically disconnect your Asianet Dataline cable from the modem when there is rain and/or thunder and/or lightning Computers Hardware Networking Leave a reply Your email address will not be published. Required fields are marker *

on 27th June 2009 / by webmaster
BSNL is the largest broadband provider in India and probably the most preferred as well by the customers because of its reliable network and excellent customer service at Indian costs. Now let us take a look at the different kinds of Modem provided by BSNL. BSNL basically provides four types of Modems(CPEs). The following post will give you the details regarding the available modems in BSNL and also the customer end requirements for these modems. Type of CPEs ( Modems) supplied by BSNL    1. Type 1: One Ethernet port + one USB port ( Models: Huawei MT800, Huawei       MT880, Huawei MT882, DareGlobal DB108). MT800 and DB108 do not have       USB ports.    2. Type 2: One Ethernet port + One USB port + Wi-Fi (Models: Huawei       WA1003A)    3. Type 3: Four Ethernet ports + One USB port. (Models: Huawei MT841)    4. Type 4: Four Ethernet ports + One USB port + Wi-Fi ( Models: Huawei MT841       with wi-fi module) Customer End requirements:    1. BSNL Landline.    2. Computer with -                   i. Operating system: Linux/win2000/winNT/Win 98/WinXP or                      higher. For exploiting speed of Dataone to maximum, WIN XP                      will be better.                  ii. Memory: Can work with minimum memory but 64MB or above                      will give better experience.                 iii. One Ethernet port or USB port. Networking Windows BSNL Leave a reply Your email address will not be published. Required fields are marker * ashik (not verified) access_time 23 May 2019 - 09:08 can any one tell which modem is best to select from bsnl. plssssssss......... VINODH SIMON (not verified) access_time 23 May 2019 - 09:08 Pl let me know the type of modem to be selected for the PLAN-BB HOME COMBO 900. prasanta sahoo (not verified) access_time 23 May 2019 - 09:08 dear sir we required a SNMP based modem with wifi enabled modem fpr a big project which monitor the modem and device status through NMS tool.please suggest a specific model for our project. thanks prasanta sahoo 9040006200 Add new comment
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