Managing and using network connectivity on a Ubuntu system

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tenant and external network vlan mapping in openstack

have deployed openstack Juno on VMware with 3 nodes one for each network, controller & compute following the below link using VLAN network. http://docs.openstack.org/juno/instal... In the neutron ...
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how to install wifi driver on ubuntu 15.04 dell inspiron 3543

please help me to install wifi driver on Ubuntu 15.04 dell inspiron 3543 thanks
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2answers
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Configure client-side DNS?

I have a network with 2 machines. machine A has IP 192.168.1.100 , machine B has IP 192.168.1.101. Now i want to resolve machine B IP address to test. I don't want to pass through a dns server. ...
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changing ethernet drivers acer aspire one D250 ubuntu mate 14.04

I was wondering if someone can help me out, I'm trying to help my mom fix her laptop, she has an acer aspire one D250, her wired internet connection stopped working suddenly, I think i have it ...
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What is the next step when an 'ask ubuntu' question isn't answered? [migrated]

I asked a question months ago (back on 16 January 2015) about an 'invalid argument' when trying to access a shared folder on an external drive usb connected to a Win 8.1 box on my network. The ...
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how to revert back to 12.0 network manager

I recently did an automatic update from 12.04 to 14.0. everything seemed to work very well until I rebooted. Now the network doesn't work. The new plasma network manager either doesn't save the ...
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Wired network working but apps cannot see the DNS

I have a working network connection but none of the applications can see the Internet. Thunderbird, Ubuntu software center, chrome etc cannot connect. So I have to use microsoft windows to connect ...
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2answers
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Wi-fi issues on Dell Vostro 3446 Ubuntu 14.04

I installed Ubuntu 14.04(Trusty Tahr) on my Dell Vostro 3446 and it seems to work fine barring a glitch. The wi-fi does not work. When I click the wi-fi button on the top right, it does not show ...
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Ubuntu x64 14.04 WPA2 only wifi not connecting

My wifi connection, a WPA2 only one (checked router) with a vodafone router is not recognized properly, Ubuntu keeps asking me for the password which I know is correct, obviously checked caps on, etc. ...
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Fixed bit rate for usb-wifi dongle

I would like to do some measurements using wireless transmission at fixed bit rate. I know that this is possible using the command (for 1 Mbps) iwconfig wlan0 rate 1M This command takes effect when ...
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2answers
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Ubuntu 15.04, Asus Flipbook TP500LN No Internet and touchpad did use NDISwrapper [SOLVED]

So I installed Ubunutu 15.04 on my Asus Flipbook TP500LN, but I don't have acces to wi-fi (ethernet does work). Now I read about Ndiswrapper, I installed the program and used it to install my wi-fi ...
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14.04: Clicking a VPN connection in the network icon menu does nothing

This is identical to (Open VPN connection doesnt work after reboot Ubuntu 14.04) with the one exception that it is a PPTP connection and not OpenVPN. Usually when I click a connection in the menu the ...
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wifi won't stay connected

I have a HP Pavillion dv6000 with Ubuntu 14.04 LTS and a Broadcom wireless card (BCM4312). My Ethernet connection is fine. But when the wifi is turned on, it will stay connected for a short time and ...
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1answer
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Proxychain with static IP untill tor reload

I recently installed tor privoxy and proxychains on my 14.04lts works ok as intended. There is no acctualy problem with functioning, I have problem with setup. As I always used it with config ...
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No connection, network card drivers?

I'm new to Ubuntu and I've just installed Ubuntu 15.04 as a dual boot with my Windows 8.1 64-bit. After the installation I can't connect to my wifi and the system doesn't recognize any network. What ...
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1answer
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Wireless Driver for Broadcom BCM 4312 will not stay connected to a wireless network

I have a HP Pavillion dv6000 with Ubuntu 14.04 LTS and a Broadcom wireless card (BCM4312). My Ethernet connection is fine. But when the wifi is turned on, it will stay connected for a short time and ...
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VPN SSTP support in ubuntu network manager … [ubuntu 15.04, 64bits]

I've downloaded these DEB packages from http://sourceforge.net/projects/sstp-client/ libsstp-client0_1.0.9_amd64.deb sstp-client_1.0.9_amd64.deb network-manager-sstp_0.9.8.8-0ubuntu1_amd64.deb ...
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1answer
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ifconfig sets wrong broadcast until ran again

This issue is very confusing for me. ifconfig sets a different broadcast address then specified, until I run the same command again. I'm trying to change the eth0 interface: inet addr:172.23.5.1 ...
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Ubuntu 14.04 slow ethernet connection (40 kbytes/s)

I've just installed Ubuntu 14.04, and I have very slow internet. The download speed is very slow (around 35-45 kbytes/s). This is with wired ethernet. Windows didn't have this issue.
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Ubuntu 14.04 Wifi Unstable

This is Thinkpad X1 Carbon Gen 3. It connects to the wifi on campus perfectly. However, it has problems connecting the router in my apartment. The wifi disconnects every 4-5 minutes -- it still shows ...
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1answer
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Ubuntu 12.04 server no internet connection

I lost power briefly today, when my headless ubuntu server rebooted I could no longer SSH into it. I assumed the drive had failed or something. I took out the drive, put it into a USB SATA enclosure ...
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1answer
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Ubuntu uses all upload speed

So a couple days ago I received a complaint that there was really high latency on our network -- fine, easy fix. I open up our firewall to see that it's sending 100,000 packets per second! Our RAM and ...
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Can't connect specific WIFI network (Ubuntu 15.04) - I tried all solutions on the forum, but didn't work -

I'm using Ubuntu 15.04, My computer cannot connect to a specific WIFI network, but it's connecting to this network using an ethernet port. Also when I open my computer with Windows 7, it can connect ...
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Where can i find complete documentation of managing network with only command line? [duplicate]

Where can i find complete documentation of managing network with only command line? Is there any kind of risk ? Note: Last time when i try command line, the graphical network manager create problem, ...
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Ubuntu 14.04 spying? suspicious traffic at boot

Brand new install of Ubuntu 14.04. After I disabled all the web searches in Unity bar (all that I could find, amazon, various lenses ect.), I noticed that when Ubuntu boots there is suspicious ...
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Cannot connect to Internet unless I disable then enable interface (since upgrade to 15.04)

My computer has two network cards: - eth0 has a static IP address and connects to the LAN. It is not managed by NetworkManager. - eth1 has a dynamic address and connects to my cable modem. The ...
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1answer
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How do I reset network devices in Ubuntu 14.04

I just installed Ubuntu 14.04 Server (without a GUI) running as a virtual machine (Ubuntu host). Everything is fine so far but I changed some settings regarding my networking devices. So now I tried ...
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“Learning” DNS server

I recently used a Raspberry Pi as a router, including services like DNS and DHCP in addition to nat. "dnsmasq" works really fine, resolving the IP addresses stored in /etc/hosts. But it can't ...
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1answer
31 views

No Network connection

I have just installed a new Asus 9750 motherboard and installed Ubuntu 15.04. My network says 'ethernet not managed'. I have set the ip address etc., and also added to /etc/network/etc. Windows ...
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1answer
11 views

VPN Basic setup help

Can anyone tell me a few steps to set-up a simple VPN, to secure my email.I have tried various servers/PPTP none work.The connection keeps getting disconnected.
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2answers
28 views

Cisco Packet Tracer install file backs up my home directory?

Using the install script for packet tracer from here backs up the data in my home directory for some reason, before the install starts. Does anyone know why? Here's the script - ...
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Using Multiple IPs for the same interface for different application?

I want to do some IP aliasing, but I want my browser to use a different IP from the IP for BitTorrent. For example: I want the browser to use this IP for example 192.168.1.45 and BitTorrent to use ...
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15.04 vivid vervet intermittent selective network outages

I recently upgraded from 14.10 to 15.04 and immediately after the upgrade was finished, I began having network problems. At first I thought the errors were related to my squid3 cache, but I have ruled ...
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1answer
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How to use DSL connection and ethernet Network concurrently

In my university, we use a dial up network for internet. Apart from that we are also connected with Ethernet network. By this we can access shared folders of other friends. But In windows we did it ...
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15.04 can't connect to WiFi when not password protected, but has login page

This has happened more than once with me, so I decided to ask. If the WiFi network is password protected my laptop connects fine. If the WiFi is completely open it connects fine as well. The problem ...
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1answer
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Mozilla NSS building

In this instruction :"In order to start the build process, use "cd nss" and execute "make nss_build_all". By default this will produce a build in debug mode and for a 32-bit architecture. You may set ...
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Ubuntu 14.04 OpenVPN no internet

Hi I have an OpenVPN server on my VPS machine. I can successfully connect to my VPN but I have not internet connection. openvpn.log: Sat May 2 12:25:23 2015 OpenVPN 2.3.2 i686-pc-linux-gnu [SSL ...
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Disappeared Wifi interface after turning on Monitor Mode?

I have just got an used computer from my friend today. Beforehand he turned on the monitor mode of the Wifi Interface in Kali but then forgot about it. I have just installed Ubuntu but I cannot find ...
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1answer
25 views

Can't connect to wireless, broadcom doesn't work

I have broadcom drivers but it doesn't work, when I hit apply change noething happens. I have only WIFI and can't connect to networks. Output of: lspci -vnn | grep Network : Network controlles ...
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wireshark crushes when using flow graph feature ubuntu 14.04

Using the flow graph feature on wireshark Version 1.10.6 causes wireshark to crush. Iam running wireshark on ubuntu 14.04,
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Ubuntu Port Scan , Security concerns

Scan results of my ubuntu 14.04 $ nmap 127.0.0.1 Starting Nmap 6.40 ( http://nmap.org ) at 2015-05-02 08:43 IST Nmap scan report for localhost (127.0.0.1) Host is up (0.0021s latency). Not shown: ...
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LAN problems accessing Ubuntu 10.04 LTS [on hold]

"Firefox can't access the server ..." on Ubuntu 10.04 LTS with ASUS P7H55-M. Ping also. (LAN, line, rights are OK) I found the solution: http://askubuntu.com/a/146669/48364
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2answers
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No WiFi after upgrade to 15.04

After upgrading to 15.04, wifi doesn't enable an internet connection. The interface connects to the router,however. I saw a similar question, where the solution was to delete two iwlwifi files - tried ...
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How can I block one or more websites from the command line, especially for Google Chrome?

I teach in a school and have a cart of laptops that I set up with Edubuntu 12.04. I am using LanSchool to monitor their screens, remotely control them, blank their screens, etc. The functionality is ...
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2answers
59 views

No wireless networks listed since upgrade from Ubuntu 14.10 to 15.04

PVC is a Dell 1545. dual booting Windows 7 & Ubuntu. I upgraded from 14.04 to 14.10 yesterday morning, all worked ok including wireless connection. Then a few hours later upgraded from 14.10 to ...
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How to setup LBaaS with Openstack and Juju?

We have our Openstack deployed via Landscape and Juju and are trying to setup Load Balancer as a Service within the cloud. We have found that we need to configure openstack-dashboard to show the ...
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Restore Network Manager to Global Menu Bar?

Just upgraded to Ubuntu 15.04 and now I no longer have the option to manage he network from my global menu bar. I need this o connect to my VPNs. Any thoughts on how to restore this? Thanks
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1answer
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How do I add an additional IPv6 address to /etc/network/interfaces?

this question How do I add an additional IP address to /etc/network/interfaces? mostly asks what i want except that i want to add more IPv6 addresses in the same interface eth0 without incrementing to ...
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WiFi connected but won't load

I've had Ubuntu 14 installed for the past 3 - 4 months & its been pretty good but in the past week or so I keep getting WiFi problems. The WiFi just stops working every few minutes but shows that ...
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0answers
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cat: /var/lib/misc/dnsmasq.leases: No such file or directory

I've searched all over the internet, but couldn't find any answers of my problem.. I want to connect my Raspberry Pi to my laptop. But whenever i try to check the ip address of my raspberry, i get ...