Managing and using network connectivity on a Ubuntu system

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16
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1answer
678 views

How to build a simple chat using netcat?

I am currently working on a project and I have implemented a simple chat application using the netcat libraries. The client is prompted to enter port number and the command nc -l -p xxxx where ...
0
votes
0answers
14 views

Selectively route through VPN connection

For a single Ubuntu PC connected to the internet via a normal home router, and with a regular VPN connection as set up through the GNOME network tool, is it possible to apply any constraints as to ...
0
votes
1answer
35 views

ubuntu server - can not ping

I have a problem to ping some network from my VMware Virutal Machine. I'm using ubuntu server 14.10, and VM network conection is set to NAT. For some reason I can not ping to www.google.com nor my ...
0
votes
0answers
15 views

how to install software for wifi dongle [duplicate]

I've got a new Realtek USB wifi dongle comes with installation cd. that includes Linux. It is not, despite assurances that it should be, recognised by the system. How can I use the software supplied ...
0
votes
0answers
21 views

having difficulty editing /etc/hosts

I'm trying to accomplish two things, the first was to disable the ability for two card catalogs which are supplied by DHCP and AD integrated DNS to get to google.com, I have finally accomplished this ...
0
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0answers
15 views

ERR_CONNECTION_TIME_OUT on random pages

I installed ubuntu 15.04 on my laptop. Since then I've ERR_CONNECTION_TIMEOUT error using chrome on webpages I use the most. It is neither browser, nor internet fault. On windows 7 everything works ...
0
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0answers
37 views

Ubuntu 14.04 with Gnome 3, Network Manager issue

I have been trying to update the network setting of a fresh install via the GUI but am seeing this error: error editing connection: did not find a connection with UUID '(null)' The Network Icon in ...
0
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0answers
24 views

How to communicate between two laptops using Wi-Fi

I have to laptops and each one has Ubuntu 14.04. I would like to communicate between these two laptops by using their Wi-Fi cards. I don't want to use a router and I don't need internet access so I ...
0
votes
2answers
27 views

Recommended branch

I am on 14.04 and I was trying to solve my weak wireless connection (download 1Mbs vs 30 Mbs wired) problem using this tread. http://ubuntuforums.org/showthread.php?t=2219952 by doing the following ...
0
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0answers
26 views

How to MAC-Nat in Openflow/Openvswitch?

I got one simple Question as in the Title ... how can i achieve a MAC-Address-Translation in OpenFlow? I need to capture DHCP Packets that are destinated for the MAC of the public interface and give ...
1
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0answers
23 views

How to debug the network disconnection?

if UBUNTU server with working static network configuration is suddenly disconnected and not able to reach the Gateway. How can i debug? Can any one please help on this.
-1
votes
1answer
19 views

Is there a ip address for adsl modem?

I am surfing the web this way:isp telephoneline > separator > adsl modem > route > my pc . In my pc : ifconfig inet addr:192.168.1.100 It is my intranet ip address. In the admin interface ...
0
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0answers
19 views

Troubleshoot Beabglebone Black Rev C Networking issues

We just built the snappy Ubuntu image (stable) in the SD card of our BBB, but when we boot it connectivity problems appear. The BBB is not establishing an IP address in its interface. Using command ...
0
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0answers
32 views

Ubuntu 14.04.3 freeze whenever Ethernet cable plugged in

I have hp pavilion dv2000 laptop and i have installed windows 7 and Ubuntu server 14.04.3 parallel. After that from Ubuntu I install xen 4.4. Now when I start Ubuntu with xen and plug Ethernet cable ...
0
votes
1answer
30 views

How to fix PPTP split tunnel?

I have installed Ubuntu 14.04 and it is fully updated. I have established the vpn connection to the host vpn server using Network Manager with PPTP. However, when I check the "use this connection ...
0
votes
1answer
29 views

Ubuntu shared folders using samba not getting listed in windows 7

I am trying to share files using samba from my Ubuntu 14.04 machine to Windows 7 machine which are connected to the same network . I have set up samba in my ubuntu machine, gave sharing permissions to ...
0
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0answers
31 views

Why can't I see one specific wifi network?

I bought my Lenovo IdeaPad S400 few years ago and immediately installed Ubuntu. Up to this day, Ubuntu 14.04 is running (without problem). However, without changing anything in the system or in the ...
0
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0answers
45 views

Netowork manager doesnot show wireless option

I forced closed my ubuntu 14.04 while updating and now i think some drivers aren't working since there is no sound while playing video and i cannot find wired and wireless option in network manager ...
0
votes
1answer
58 views

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 ...
0
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0answers
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 ...
0
votes
1answer
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 ...
0
votes
0answers
28 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 ...
1
vote
1answer
38 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 ...
0
votes
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 ...
0
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0answers
11 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 ...
0
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0answers
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 ...
0
votes
0answers
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 ...
1
vote
0answers
22 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 ...
0
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0answers
22 views

How can I port forward for a remote tool? [on hold]

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 ...
0
votes
0answers
26 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. ...
0
votes
1answer
35 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 ...
0
votes
0answers
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 ...
0
votes
0answers
157 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 ...
1
vote
0answers
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, ...
0
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0answers
66 views

Lenovo X250 - Wifi Connection drops constantly - Ubuntu 14.04 [duplicate]

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 ...
0
votes
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.
0
votes
2answers
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 ...
0
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0answers
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 ...
0
votes
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 ...
0
votes
0answers
28 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 ...
0
votes
1answer
22 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.
0
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0answers
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 ...
0
votes
1answer
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 ...
0
votes
0answers
71 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 ...
0
votes
1answer
48 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 ...
3
votes
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 ...
0
votes
0answers
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, ...
0
votes
1answer
35 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 ...
0
votes
0answers
19 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 ...
0
votes
0answers
89 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 ...