Managing and using network connectivity on a Ubuntu system

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Ubuntu 15.04 server DNS server - private network (no internet access)

Can anyone assist me in setting up a DNS server inside Ubuntu 15.04 server edition (inside VirtualBox)? This is on a private network in an area with absolutely no internet access, so I need to ...
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21 views

Ubuntu Clients Ignore DNS Server on local network

I currently have a dnsmasq DNS server running on my desktop Ubuntu 15.04 installation. I use it to point to local devices on my network. For example, I have a record linking kerberos.dgourd.com to ...
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35 views

Wired LAN is being connected, but can't access internet

I live in a hostel. We have a LAN network and ports in each room. To access internet, we need to enter specific IPV4 settings. I have the necessary settings, and on connecting the cable, it shows that ...
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27 views

How could I change the eth1 IP with command line where eth0 should be also working

I changed my eth1 IP from 133.130.60.38 to 133.130.60.36 with the following command but it didn't work, However, it will cause netowrk totally unavailable sudo ifconfig eth1 133.130.60.36 ...
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36 views

Can't connect to internet on minimal Ubuntu

I just installed minimal Ubuntu to a pendrive. I did this by using VirtualBox, connecting the pendrive to it and installing to it. I did not install any additional software. But when I booted to it I ...
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1answer
12 views

Wired connection is not showing in the menu (ubuntu 14.04)

Wired connection is not showing in the menu (ubuntu 14.04) ifconfig -a lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host ...
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10 views

Wifi ap-hotspot starts but not detecting

I have installed the ap-hotspot on my ubuntu machine. Anyhow I installed this & when going to start it gives me : HP-Pavilion-dv6-Notebook-PC:/tmp$ sudo ap-hotspot start Starting Wireless ...
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11 views

Relay Wifi on Ubuntu 14.04

The wifi in my bedroom is really weak, So I used windows program Maryfi to create a wifi point on my laptop, and extend the signal so other devices can use the wifi. This works flawlessly, except I ...
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12 views

Maas-Juju DNS Name Resolver Problem

I've been using my Maas (1.7.0+bzr3299-0ubuntu1~utopic) and Juju(1.24.2-utopic-amd64) setup for a few months now, and lately have noticed that neither mass server or juju services are able to resolve ...
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21 views

Cannot enable wireless, cannot shutdown after sleep

I'm running Lubuntu 15.04 on a 2009 Acer Aspire One and I love it when it works but every time I close the laptop lid, the network gets disabled (and I can't enable it) and I can't shutdown through ...
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22 views

How can I port forward for a remote tool?

I have looked everywhere and haven't found anything to work. I recently wanted to get into ethical hacking since I know physical security really well. I downloaded a RAT tool to play with but don't ...
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25 views

VNC connection refused

I have an ubuntu 14.04 server running xubuntu desktop and x11vnc as a vnc server. I am connecting to it via VNC from another xubuntu dekstop using xvnc4viewer. The server has a dedicated IP address. ...
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32 views

Can't connect to Wifi 5GHz with Broadcom Corporation BCM4311

I am using b43 driver installed via synaptic package manager and I have loaded the module through command line “modprobe -r b43 bcma”. The wifi indicator on my pc light up and the wifi manager ...
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16 views

usb0 interface is not listing in ifconfig ubuntu 12.04

I m using Ubuntu 12.04 and wanted to change usb0 interface MTU to 1500. With reference to thread http://ubuntuforums.org/showthread.php?t=1284176 I have tried below options. added "mtu 1500" to ...
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152 views

I can't get wireless networking to work on my acer aspire laptop. (qualcomm atheros AR956x card)

I have been searching for about 5 hours on how to fix this, but it won't work. anyways, I just installed ubuntu 15.04 on my new Acer aspire 15" laptop. Inside, it has a Qualcomm Atheros AR956x ...
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23 views

Community computer lab

I would like to set up a server, that monitors and pushes down software, along with a clean sweep/restoration at log out to 10 laptops - 8 windows and 2 Ubuntu. I know there are more Windows laptops, ...
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61 views

Lenovo X250 - Wifi Connection drops constantly - Ubuntu 14.04

I'm running Ubuntu 14.04 on my Lenovo X250 and I experience frequent drops of my WIFI connection. After the connection has gone down I can still see my network's name in the list of available ...
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1answer
13 views

Xubuntu Install-No Network

I installed Xubuntu 14.04 clean on a Dell Vostro 1000 and now I have no network at all. Entering ifconfig gets a return of ifconfig not found. Everything was fine from the live disk.
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21 views

Wifi Is remained Off in HP Laptop Ubuntu14.04

I am not able to turned on the wifi and light on the button is remain orange(which means off). I found that it may because of hardware switch off. But i tried using rfkill ubloack all then rfkill list ...
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5 views

Wireless adapter not connecting until login

I have Ubuntu Mate 15.04 installed on Raspberry Pi 2. I connected a wireless USB adapter to it, and it works fine until reboot. When the system is started up, there is no connection to the network ...
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1answer
19 views

Two servers(services) on one machine (IP)

I'm wondering, is there any option to run multiple servers or services on one device (Ubuntu server) on one IP? For example I want to install something similar to ActiveDirectory, let's say it will ...
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26 views

Ubuntu 14.04 Wifi not working well in lenovo B5400 any help?

My Wifi not working regulerly it is working for 10 min and then stop although it is signal seems good. to work i must connect my laptop with the router to work the internet output of terminal ...
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21 views

How to prevent arp spoofing

How to prevent arp spoofing and mitm attack? I need simple solution. In network we have several workstation, switch and router.
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24 views

Network, airplane mode on: CAN'T CONNECT

I'm a new user of Ubuntu that's why I really have no idea about this. I checked the Network Settings and it says that the Airplane Mode is on. I can't turn it off so I searched how to. I think it's ...
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33 views

port forwarding to Arduino device on home network

I have a home server running Kubuntu 14.04. It serves a web page to the outside world and provides internet access to all devices on my home LAN. I have an Arduino device with a web server application ...
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68 views

Install AMD drivers [R9 280]

I have been using the Additional Drivers for my AMD GPU (non x version) since I got it. Everything seems to look fine on the outside; I get the right monitor resolution, colors seem right...but text ...
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1answer
47 views

DNS Server (a newbie asking)

I'm a new ubuntu user. I installed webmin to control my website better than command lines and also to not install desktop for perfomance. As I could understand what DNS is, how can I configure my ...
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1answer
31 views

Setting up community computer lab from scratch [closed]

I've been given 10 refurbished laptops, 1 wireless printer and licenses for MS Office 360. The majority of the computers are running Win7 with no issues. There are a few that have a few problems, but ...
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10 views

Neutron OpenFlow L2 Address Translation Mac help

Like the title says i need help configuring OpenFlow on my Network Node (Openstack). The pain is that the Server Hoster i am using, uses a DHCP-Server that binds IPs to MAC Adresses. Now they say, ...
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1answer
34 views

Connect Ethernet network to Wireless network on one computer

I have access to the internet via ethernet port. I've been given a WiFi dongle and a task to implement WiFi access point that devices can connect to and use internet trough the ethernet port. So far ...
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18 views

Relay Public IP's to remote clients with OpenVPN

Since the last few days I have been attempting different ways of accomplishing one thing that should be relatively simple; I have a Ubuntu VPS on my VMWare infrastructure at the datacenter with a ...
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87 views

Lenovo G50-80 Network not working

I have a Lenovo G50-80, I'm running Ubuntu from USB (haven't installed it yet). I was about to install it, but I noticed the wifi wasn't working.. I have a wifi chip built inside, and I'm afraid my ...
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63 views

Ubuntu 14.04,Wifi is disabled by Hardware Switch - Lenevo G50-80, Qualcomm Atheros QCA9565 / AR9565 Wireless Network Adapter (rev 01)

I have brought new Lenovo G50-80 Laptop and make it dual boot. My wifi works fine in Windows 8.1, but not working in Ubuntu 14.04, showing Wifi is disabled by hardware switch. When I do rfkill*, I got ...
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18 views

Network Manager does not work the first time

There is a problem with my wifi(probably the Network Manager after I upgraded to 15.04 from 14.04. When I try to connect other wifis(secure, have password), it just load for a while and then jump back ...
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11 views

How can I install OS(Windows/ Ubuntu) from a networked Ubuntu system

I have two system networked. In first one I am using Ubuntu. The second PC doesn't have CD drive. I have no Pendrive to make bootable Pendrive. So I need to know that is it possible to Install Os from ...
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Wifi Drops out of nowhere

So here is my next question/issue... my WiFi stops working suddenly out of nowhere. First I thought it had to do whenever the computer locked from not being used but I was wrong. I wasn't aware of ...
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1answer
73 views

Broadcom wireless driver not working

I keep getting disconnected from the internet. When I try to reconnect, the system sometimes freezes completely. This is a known issue for my Wireless Card (Broadcom BCM43142) that has been covered ...
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1answer
23 views

smbclient finds NAS, but mount can't find it

I'm trying to auto-mount a NAS drive I have to Ubuntu Server, but it's giving me an issue where it doesn't seem to find the NAS name on the network when I mount it. Pulling up the shares like this ...
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28 views

All outgoing connections blocked

I have a Minecraft server in development on an old PC running Ubuntu (14.04LTS) It's hosting a site as well for that same reason. All was good until it stopped accepting logins. It shows this to the ...
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1answer
84 views

WiFi connection much slower on 14.04 than windows

I just installed Ubuntu and am very new to it, but my connection is super slow: downloading at a rate of 8kb/s whereas on Windows I download a rate of 4MB/s on a 70mbps internet connection. How ...
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1answer
55 views

Manually edit DNS in Ubuntu 14.04

I have problem with network connection. Internet don't work but when I type ping 8.8.8.8 in terminal it works. So I called ISP and operator tell me that to change DNS but I don't know where it is. ...
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17 views

(Neutron Openvswitch) bridge cant obtain dhcplease

I am trying to bridge my external network ... for that i have to give my eth1 (external) 0.0.0.0 and the bridge the public ip. after that i start dhclient br-ex ... dhclient tries to find an offer ...
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1answer
19 views

Remote package installation over LAN

I am trying to work on a project where i am supposed to install softwares and packages on one system and it should replicate on other systems connected on LAN. How can i proceed with this? I was ...
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15 views

Dual Boot Ubuntu 14.04 looses connection

I recently dual booted my laptop with Ubuntu 14.04 and Windows 8.1. However while running Ubuntu after a few minutes I can not connect to the internet. This happens on multiple wifi networks so it is ...
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2answers
48 views

wlan0 interface is missing

Whan I ran;: ifconfig eth0 Link encap:Ethernet HWaddr xxxxxxxxxxxxxxxxx inet addr:192.168.1.7 Bcast:192.168.1.255 Mask:255.255.255.0 inet6 addr: xxxxxxxxxxxxxxxxxxxxxx ...
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9 views

Problem AMD Raedon R2 Wireless & RJ 45 wired, Lenovo 45-45 Ubuntu 12.04 AMD R2

I have an issue neither my wireless nor Ethernet are working. I looked on the disk and recognized a pattern for loading drivers from the disk but can't remember how/ I have a Lenovo B50-45 with AMD ...
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60 views

BCM43142 monitor mode : operation not suported!

I'm using Ubuntu 14.04 LTS in an HP pavilion 15 laptop which has BCM43142 hybrid adapter. But when I try to put my adapter in monitor mode I get the following message : Error for wireless request ...
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1answer
21 views

No network with HP ProLiant DL380 G5

I'm using Ubuntu 14.04.3 LTS with my ProLiant. Here's the problem: During installation, when it goes to configure the network, it detects my five network ports and the type of hardware for them just ...
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My SSH between laptop and server works in localhost, but not remote

I know that this is a common issue, and ive seen alot of posts about it and read alot, but i think alot of the articles and guides assume that the remote connection will work just as easy as the ...
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25 views

How to check wether remote client is running firefox using ssh?

I want to login to client who is using firefox, i am using arp-scan to fing ip address and ssh to connect to respective client but i want to connect to client who is using firefox so how will i know ...