Managing and using network connectivity on a Ubuntu system

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Ubuntu Server Network Setup

Hello All I am new to the community, sorry if I break some of the questioning precedents. I am trying to set up an ssh server and I just installed the 14.04 Ubuntu Server on a desktop. I was not ...
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1answer
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Unable to connect to internet behind proxy using terminal in ubuntu 14.04

I am having trouble while running sudo apt-get update. It is asking for proxy authentication, even ping google.com not working. Though I have updated apt.conf file at /etc/apt/ location but still not ...
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LTSP server and clients no longer able to access internet

The network setup in my school is identical to the second image on this page ("A setup with internet connection"). Server + fat clients with wired connections to the switch, which is connected to a ...
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1answer
35 views

Ubuntu and proxy

I have Ubuntu 15.10 and I can't get updates using sudo apt-get. I tried setting up a proxy using GUI settings and using this command in the terminal: export http_proxy="http://user:password@host:port ...
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1answer
43 views

Kinda newish to Ubuntu, and I need some internet help

I've Ubuntu on a dual boot, and I primarily use Windows. I was having an issue where my machine would completely crash when I tried to log in with the GUI. So I figured that I could get an update from ...
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5answers
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Samba Share user/password error after update

this is the first time that I couldn't find an answer so this is my first question. I will provide as much information as possible. I have an ASUS router that has 2 HDDs. There is only 1 ...
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Acer_wmi blocking my wifi

Every time I log in I have to type "sudo rmmod acer_wmi" to get wifi to work. How do I get this to run on startup or permanantly delete acer_wmi. Thx
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Connect android ftp server and filezilla

Wanna connect android phone via ftp to my filezilla on ubuntu. I've installed ftp server on android and run it, it's ip is 192.168.1.103 and port 2221. But I've got an error while trying to connect: ...
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Can't connect to wifi. Lenovo ideapad 500-15ACZ Ubuntu 14.04.03LTS [duplicate]

Freshly installed (coming from Windows 10) checked lenovo's site and I'm afraid there might not be a driver out there that's compatible with this version of Ubuntu yet.. Please tell me I'm wrong.. $ ...
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1answer
25 views

In file browser: connect to ssh server via other ssh server

in my file browser I have problems connecting remotely to a machine which sits behind a nasty firewall. Usually in a terminal our procedure to connect to that server goes via an ssh connection within ...
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1answer
278 views

Unable to connect to the Internet using wired connection, even when its plugged in

I recently clean installed Ubuntu without dual boot, so everything was erased, but now I'm unable to connect to the Internet, even using wired connection. On "Connection Information", it says it is ...
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Cant connect to LAN after moving to an optical fiber connection

I use Ubuntu Server via VirtualBox. We have just changed the office internet to an optical fiber connection and the internet on UBUNTU stopped getting recognized, even though when I open the browser ...
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1answer
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Ubuntu 14.04 waiting for network configuration on ESXi

I'm running Ubuntu 14.04.4 LTS on VMWare ESXi 5.5 with 2x E1000 Adapters (tried VMXNET 3 aswell, but no changes on the issue below) I'm using 2 static public IP's, but the server is continuesly ...
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ssh connection timeout event though I'm connected in the separate terminal

Problem does not occur during first few minutes after restart of the client machine. I'm accessing via ssh using key my remote server. I cannot connect to this machine from other terminals. When I ...
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Ubuntu 15.10 make a hotspot… Again

I've used to share the internet from my computer to a tablet by manually setting the wifi connection mode to ap, as described in numerous places. Here for example: Create WiFi hotspot on ubuntu ...
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200 views

No networking: Failed to bring up eth0

The networking service fails to start / doesn't start on reboot. Restarting networking (via systemctl): networking.serviceJob for networking.service failed because the control process exited with ...
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2answers
24 views

Unable to SSH to a host within my home LAN by using the hostname or local IP address

I want to access the SSH server on a Raspberry Pi (with Raspbian OS) from an SSH client on a X86_64 computer with Ubuntu 14.04, both located inside the same home LAN. I am able to SSH from the ...
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2answers
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Lenovo G50 cannot connect to Wi-Fi

I am new to Ubuntu. ^^ It seems I cannot connect to Wi-Fi. When I click on the Networking logo on the top bar, it only shows "Ethernet Network" and "disconnected". Version of Ubuntu is 14.04 LTS. I ...
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Understand the differences between two network configurations for MAAS

I am trying to understand the differences between two network configurations for MAAS. My understanding is that the both achieve the same tasks where the first network connects to the internet and the ...
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what does this error mean?

Waf: Leaving directory `/home/nlab/ns-3-allinone/ns-3-dev/build' Build failed -> task in 'nlabmini' failed (exit status 1): {task 139729806595728: cxx nlabmini.cc -> nlabmini.cc.2.o} ...
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36 views

Skype shows most contacts as offline

Skype only shows that 2 people in my contacts list are online but when I check on my phone/computer it shows that a lot more are actually online. Also I think this is somehow related but when I open ...
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Port Access through VPN

I'm trying to access a PC from behind a VPN (PIA) using the Network Mgr on Ubuntu 14.04.4 but having some issues. Without the VPN up, I can access WANIP:8022 which port forwards to 192.168.1.10:22, ...
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Ubuntu 14.04 unstable wifi connection with Intel wifi card

I have problem with my Intel wireless card. Connection is very unstable and very often gets lost. I've tried to disable IPv6 settings but it doesn't help. $ lspci -nn | grep 0280 01:00.0 Network ...
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2answers
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What are alternative reasons for low network connectivity?

Excluding this, as I have tried all methods listed on this site. And excluding this and this, they are in the aforementioned site. What are possible causes for a software based slowdown of internet. ...
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1answer
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Ubuntu 15.10 having troubles with internet connection (first time boot)

This is my first time that I've installed Ubuntu on this machine and I'm running the 15.10 version (most recent one). I installed Ubuntu and all seemed fine. I went ahead and connected to my home ...
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How do I get wireless internet working after duel booting Ubuntu/mac OS X [duplicate]

I just successfully installed Ubuntu 14.04.4 along side the mac operating system. The only problem now is my computer is not detecting any kind of wireless networks while using ubuntu I'm not that ...
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Error while sniffing packets using scapy

arp = ARP(pdst=ip1,psrc=ip2,op="is-at") packet = ethernet / arp while True: sendp(packet, iface=iface) time.sleep(10) And the Error is - File "/home/darshan/.local/lib/python2.7/site- ...
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1answer
45 views

Is there another place to host/machine name?

I have a cloned VirtualBox machine that I've asked to clear MAC address after cloning. The machine name was changed from "node01" to "new-host-7.home" and I changed to "node02" by using conventional ...
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Ubuntu 16.04 - Seeing my wireless card as wired [closed]

After installing Ubuntu 16.04, there is weird, intermittent behavior after random reboots. I'll boot everything up, and I won't be able to connect to WiFi. When I click on the network icon, or go into ...
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Is it ok to kill lightdm and related processes in lubuntu to reduce load as I use terminal?

I'm running Lubuntu 14 in my old PC. I have connected it to my router via ethernet and access it with putty, it has no dedicated monitor. I think the GUI is not needed any more, can I kill the ...
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24 views

Wifi not working after resume

I have problem my wifi doesnt work after resume. I already tried lot of solution over google. What currently I have: cat /etc/pm/sleep.d/wakenet.sh #!/bin/bash case "$1" in thaw|resume) nmcli nm ...
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2answers
29 views

VPN in non-browser applications?

I am at a boarding university with restricted internet access (most broad-band using sites (YT, other video sites, gaming content sites) are blocked). I can bypass the YT blockade easily in browsers ...
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1answer
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How to Assign an I.P. address to a Virtualbox Appliance?

How do I configure a VirtualBox appliance to have its own I.P. address when running on a host Ubuntu machine? I've tried following the solution for this question but am not having any luck: Getting ...
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39 views

No wireless network option

I just downloaded 14.04 and can not figure out how to get my wireless adaptor working. I have tried the b43 installer and still nothing. Right now I am using a USB between a working computer and the ...
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2answers
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Cannot find tcpprobe in ubuntu

I want to use tcpprobe to record the state of a TCP connections but I cannot find tcpprobe in /proc/net. Is tcpprobe not present by default? tcpprobe
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Is it possible to host multiple domains on one ip address with Haproxy?

With apache2, it's possible to host multiple domains on one ip address with virtual hosts. For example, I need xxx.local, yyy.local, and zzz.local all linked to my computer's ip address. Is this ...
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New Linux Install. After competion on reboot the Internet connection icon has disappeared

I am a new user to Linux. I have completed a fresh installation (removed windows) onto a HP Nx7300 Laptop Standard 1gb of RAM with Ethernet card inside using a WIRED connection. Everything seemed fine ...
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Can not connect to any WiFi network other than my office WiFi. I am able to connect to hotspot connection.

I am able to connect to mobile phone hotspot networks. Network manager asks for WiFi password repeatedly. None of the following solutions work. Solution1, Solution2 Outputs of few commands $ sudo ...
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1answer
30 views

Ubuntu 15.10 connect to VPN server on port 443 without certificate

I need to connect to a VPN server from Ubuntu 15.10. I know gateway, port 443 username and password. Usually I connect from Windows using Forticlient, but there is no version of this software for ...
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Best solution for backing up network drive to external hdd using Ubuntu 14.04

I've just recently installed 14.04 on my laptop, having previously suffered a hdd failure and having no recovery disks/partition I decided to get a cheap HDD & try to have Ubuntu as my only OS. ...
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1answer
48 views

Ubuntu 14.04 unable to establish Ethernet or WiFi connection

I recently installed Ubuntu 14.04 on dual boot with Windows 7 on separate HDD. I went through several threads regarding connection problems but I didn't understand them much as I have never used Linux ...
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I installed a fresh ubuntu 14.04. wlan0 is not showing up in the ifconfig but wifi is working correctly. How to fix it?

Tried everything mentioned on this thread but it is still not working http://ubuntuforums.org/showthread.php?t=2239747
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1answer
22 views

Does MAAS Cluster Controller API URL need to setup to Internal Network and not LAN Network

MAAS 1.9 - Ubuntu 14.04.4 Wondering if the MAAS Cluster Controller API URL need to setup to Internal Network and not LAN Network..... My Internal network is 10.x.x.x on eth1 and not accessible from ...
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1answer
169 views

MAAS interface eth0 (External) and eth1 (internal)

I have two interfaces configured in MAAS under Cluster eth0 - external IP VLAN 10 eth1 - internal (10.x.x.x) VLAN 20 - DHCP-DNS Managed I am going to add a node in MAAS.....I have setup the node ...
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1answer
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MAAS 1.9.1 GUI Taskbar missing Network TAB on Ubuntu 14.04.4

I deployed MAAS 1.9.1 on Ubuntu 14.04.4 but all the install guides showing MASS GUI having Network Tab ie Nodes-Cluster-Images-Zones-Network-Settings but i am seeing the GUI Taskbar option below ...
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1answer
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iptables is blocking only some connections to port 80

I'm running a Ubuntu 15.10 server with an nginx webserver on it. I've used the following iptables configuration to allow port 80 and port 443 connections: *filter # Allow all loopback (lo0) traffic ...
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1answer
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MaaS Node cant ping external servers

I have setup a MaaS server with eth0 going to the internet and eth1 an internal switch connecting the the MaaS nodes. I and can commission and deploy nodes on Trusty Ubuntu but those nodes can only ...
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2answers
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Network configuration | apt can't download anything

I'm having some issues with the FTP server I'm currently setting up for my company. I installed the server completly, updated everything and the server works fine now. I installed everything behind a ...
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2answers
63 views

Next problem with wlan0

I have installed Ubuntu 14 and can't connect to WiFi. Tried to find solutions by myself but still things don't work out. Steps I have taken: Went to Software And Updates -> additional Drivers and ...
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50 views

Install Qualcomm Atheros QCA61x4 drivers without Internet access

I am trying to install Ubuntu 14.04 LTS and having problems with my wifi card. As it reads in the title, i dont have any internet access on my Laptop and cannot install any packages via api-get. I ...