Managing and using network connectivity on a Ubuntu system

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How to use the --configure option in the network-admin tool

Well, I have no idea. Neither Ethernet connection 1 nor the standard interface name pair eth0/eth1 nor the internal interface name of my network adapter works here. It occurs to me that network-admin ...
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7 views

Determine nameserver to use behind a proxy

I have access to internet only behind a proxy. apt-get works fine but when I do ping google.com I get ping: unknown host google.com. This is not the case when I do ping without a proxy. How can I ...
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MAAS Region and MAAS Cluster Master on the same machine

I have installed MAAS with Ubuntu 14 server and I am trying to set up the cluster master. When I make any change to the cluster master interface I get this error Error: Unable to connect to cluster ...
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15 views

ipaddress of ipv4/ipv6 address

IM new to networking and would like to know the ipaddress of the given address :- c23385f4-80ab-4501-b123-d2b6ae9bb60d (I have changed the nos little bit) How will I know if this is a ipv4 or ipv6 ...
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1answer
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Test my custom created DNS?

I used VPS Ubuntu 14.04 (x64) to install test environment for my Ruby on Rails development. And I succeed with installing and configuring. Now I also configured DNS on that VPS server, everything ...
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7 views

Disconnected- you are now offline Error

I am new to Linux and this group as well. I have installed Ubuntu 14.04. And I am currently facing an issue with internet connectivity. From past few days, I have read several posts related to ...
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9 views

CUPS not working

so .. we have a problem hemre! server with ip 192.168.1.2 on the adapter1 /internal network/ ip 10.8.0.1 on the adapter 2 /external network/ cups installed with /etc/cups/cupsd.conf MaxLogSize 1m ...
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Toshiba Laptop wifi issues using live Ubuntu

I am running my Toshiba laptop from Ubuntu live distros mounted on an external usb hard drive. I had been using Ubuntu 14.xx without any issues. However, being curious, I wanted to try another ...
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8 views

How to install tomcat 8 in ubuntu 14.04 along with setting the path

I tried to install tomcat 7 earlier, but while i was executing my application, the the java file could not run. Because the path was not set. So please tell me How to install tomcat 8 in Ubuntu ...
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15 views

Why does not the Wireless Connection get any Internet access?

I have been carefully reading a few web pages related to this topic before deciding to ask Ubuntu, but unfortunately now I have to come out of my hide-out and to ask for some more professional help. ...
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24 views

Cannot connect to ethernet

I have a dual boot laptop. In Windows I can connect to ethernet without a problem but in Ubuntu Trusty it cannot get an IP address. Doesn't seem to be the network's fault because I've had this problem ...
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Dell XPS 13 (2015) cannot find some wireless networks

I have Dell XPS 13 9343 (Ubuntu 15.04, 3.19 kernel) with Broadcom BCM4352 wireless card and it cannot find some wifi networks including mine. My other notebook (same Ubuntu version) and cellphone have ...
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Steam does not connect to network

Full disclaimer: I am running SalenOS, which is an Ubuntu 14.04 derivative, but not vanilla Ubuntu. I don't have some things like the Ubuntu GUI Package Manager. When I try connecting to Steam, it ...
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18 views

Wireless connections do not work in Ubuntu 14.04 LTS

I'm on a HP laptop running ubuntu with windows 10 (dual boot). All wireless connections are being detected by the network manager but I'm not able to connect to any of them. I ran this script : ...
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5 views

Common solutions not fixing wireless internet dropouts

I've been working on this since I installed 14.04 LTS almost two weeks ago, and nothing is working. I've disabled IPv6, redownloaded the wireless driver, updated the driver, set the dns server to both ...
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16 views

Accessing router with Ubuntu client from remote

Is it possible to use my router Dlink-655 as a (gate)way to watch Netflix when travelling abroad? In other words, can I connect to the internet abroad and from there to my router and use my router's ...
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11 views

wi-fi, driver problem

I recently installed ubuntu 14.04 alongside windows, and one of the first things i noticed is that my wi-fi switch (fn+f3) didn't have any effect. I looked up the problem online, and the only results ...
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12 views

Routing within Linux while connected via VPNC

I have a trouble, when i connect to A vpn server at that time my VPNC client machine is not locally available within the Local Network and VPNC client machine is only accessible within the Same WLAN ...
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18 views

Lubuntu 15.04 WiFi

I have a macbook 5,2 and downloaded Lubuntu 14.04 and WiFi won't work. I did a command to find the card (forgot what command exactly) and it came up as a Broadcom BCM4322. On the mac system profiler ...
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15 views

Ubuntu update failed because of forced ads from ISP

Sudo apt-get update never finished, giving "GPG Error bla bla InRelease: Clearsigned file isn't valid, got 'NODATA' (does the network require authentication?)" I believe the culprit is my ISP, they ...
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18 views

Wireless disabled problem

I had a problem with wifi on my Lenovo g50-30. wifi was disabled. I read on ubuntuforums that command: sudo modprobe -r ideapad-laptop sudo rfkill unlock all rfkill list all would help and it ...
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20 views

libvirt networking problem: Host cannot access Internet (while guests can!)

I run a Ubuntu machine which hosts via libvirt several guest VMs (also Ubuntu). The guests can access the Internet, while the host can only reach the local network, including the gateway. This seems ...
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Network disconnected over and over again

Network keeps on disconnecting after 2 to 3 mins on Ubuntu 15 gnome and every time I have to run sudo service network-manager restart to get it working again
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Broadcom BCM43142 driver

This is a continuation of this question. One answer said that the driver for the Broadcom BCM43142 wifi chip has "not been released into the mainstream yet". Does anyone know when it will become ...
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27 views

After modifying /etc/hosts which service is needed to be restarted in ubuntu

After modifying "/etc/hosts" which service is needed to be restarted in ubuntu !
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Wifi driver not working properly dell inspiron 1525

I tried just installed Ubuntu 14.04 LTS on a colleague's Dell inspiron 1525 who wasn't happy with his previous os... I tried to install the basic driver, with $sudo apt-get install ...
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Ubuntu vmware workstation guest doesn't connect anymore after windows host update from 8 to 10

I'm using VMWare Workstation 11 to power a Ubuntu 15.04 virtual machine. My Host operating system was Windows 8 and the NAT connection from Ubunto to the Internet via my host system worked perfectly. ...
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18 views

Bind on non-recursive mode doesn't work

I installed bind for caching server and recursive mode works well. But Non-recursive modes doesn't work well. Here are option contents of /etc/named.conf (For recursive) options { listen-on ...
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24 views

How to enable Wi-Fi in HP 15-r250TU

I have recently purchased a HP Laptop. Model number is HP 15-r250TU The problem is, I can not connect to Wi-Fi in Ubuntu. I tried installing Windows. Wi-Fi works fine in it. Can anyone help me?.
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Ubuntu Linaro 15.01, unable to get WiFi working

I installed the latest Ubuntu from the Linaro website to my Pandaboard ES. Everything works great and boots correctly but I can't get WiFi to work. When I run iwconfig it reports: wlan0 no wireless ...
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34 views

Why cannot allow/deny specific software in ufw Linux?

Why cannot allow specific software (like Firefox) to use internet but deny other software (link Chrome) that are using same port in ufw? In windows there is the feature, why ufw don't have that?
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Networking Issue, Binding on 14.04

IPs routed at the switch just fine. interface Vlan100 ip address xxx.xxx.235.1 255.255.255.0 secondary ip address xxx.xxx.236.1 255.255.255.0 secondary ip address xxx.xxx.237.1 255.255.255.0 ...
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18 views

How to rotate WiFi connections?

I have 2 WiFI connections available. Sometimes, the WiFi network disconnects, and when that happens, I'd like the system to automatically use the other connection. How can I do this in Ubuntu?
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No network in recovery mode

I have some problems with the display, so I need to go into recovery mode to repair that. Now the problem is that I can't get the Internet to work. After I get in the command line as root, I do ...
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1answer
27 views

Problem during install Ubuntu 14.04, 14.04.1 and 14.04.2 on HP DL360p Gen8

I'm trying to install Ubuntu 14.04.1 on a HP Proliant DL360p Gen8 with 2 HP Network card 560SFP+ (one onboard and one PCI-E). When network configuration comes up, no DHCP is found even if there is ...
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Create WPAD and PAC configuration files for branch proxy configurations

Below are the configuration of current proxy.pac file. function FindProxyForURL(url, host) { var resolved_ip = dnsResolve(host); if (isInNet(resolved_ip, "10.0.0.0", "255.0.0.0") || ...
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Change virtual box ip from 10.2.x.x to 192.168.x.x

I have applications and xampp setup on virtual box with ubuntu 12. The ip address for virtual machine 192.168.x.x but after installing vmware ,ip change for virtual box to 10.2.x.x I want to change ...
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1answer
573 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 ...
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33 views

Kali Linux 2.0 Wireless Adapter [on hold]

I have been having difficulty trying to get my wireless adapter to work with the new Kali Liunx 2.0. I have a Edimax EW-7822UAC wireless USB adapter. Everytime I download the driver on the Edimax ...
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13 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 ...
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1answer
30 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 ...
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10 views

how to install software for wifi dongle

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 ...
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20 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 ...
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12 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 ...
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25 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 ...
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23 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 ...
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2answers
25 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 ...
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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 ...
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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.
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What does the public1 mean here? [on hold]

$ tcpdump host 192.168.1.100 tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on eth0, link-type EN10MB (Ethernet), capture size 262144 bytes ...